Prepare v0.7.0 with recording times, work identities and clearer repository navigation (#71)

- Prepare v0.7.0 release notes and validation receipts (79a11f6029ed9f23a09542499120e7eb779bd5c6)
- Bind v0.7.0 release manifest to exact critical-file revision (1671aca9a115e379febc66c5eab0e81e1b282261)
- Include observed per-record timing in the v0.7.0 release draft (a756837790a02ca72da3c685b8759edd59cdd4b0)
- Bind v0.7.0 manifest to the final timing and release files (a9f81501f04b0a5b26bc2b863df9268494f3095a)
- Group release receipts and supporting documentation into folders (0e21e3ab804882b3980443729101aef1a984ed51)
- Bind the v0.7.0 release manifest to the reorganized repository tree (cb5f2941098f3536c6a6bf62a3336f1520780c51)

CHANGELOG.md

@@ -2,6 +2,64 @@
 
 ## Unreleased
 
+## v0.7.0 — Release (2026-09-19)
+
+This release freezes the verified content at `521f4ee62ee3843cf36394499c10bf33f07dcaae`:
+703 Standard and 128 Pre-Standard video records, with an optional registry of
+37 creator-confirmed drawings and 360 recording links. Relative to v0.6.0,
+74 unchanged-source recordings are added: 73 prospective fragments across four
+complete drawing sequences and one historical August 20 Rec02. The recordings
+add 68,125,363,425 bytes and 9,830.501363 seconds of encoded playback.
+
+### Repository navigation
+
+- Grouped the six release manifests under `releases/` and supporting archive,
+  validation and Viewer-migration documents under `docs/`, reducing the root
+  from 22 entries to 15. Folder indexes and active links point to their new homes.
+- Preserved prior manifest bytes and immutable release/tag paths. Receipt paths
+  inside historical manifests still refer to their declared historical revisions.
+  Canonical media, metadata, schema, checksums and evidence packets stay in place.
+
+### Per-record timing evidence
+
+- Added the optional Recording Timing v2 table for all 339 prospective recordings
+  across 33 owner-confirmed works. All 339 have retained MP4 format creation
+  timestamps; 316 also have matching retained video-stream tags. Filename-based
+  starts are available for 163 recordings, while 176 starts remain unknown.
+- Published a projection from 13 retained ingest audits, checksum-bound source
+  receipts, field definitions, a validator and regression tests. The validator
+  preserves the frozen cohort when unrelated later index rows are added.
+- Kept creation/finalization observations separate from filename-derived starts
+  and canonical group-finish labels. Observed intervals are not validated capture
+  durations. No model-estimated starts are inserted into this table.
+
+### Work identity and compatibility
+
+- Added the optional `Work_Identity/` registry with opaque permanent work IDs,
+  revision-pinned record joins, and owner-confirmation evidence. Coverage remains
+  partial: 471 indexed records are unlinked; an absent link means unknown.
+  Different IDs are not independently verified negative pairs for benchmarking.
+- Preserved all previous record IDs and media bytes. The documented September 1
+  correction renames 12 active paths from `02:13` to `14:13` and updates their
+  time labels; the correction ledger preserves the historical path joins.
+- Backfilled repository-ingest provenance for 12 August 3–9 records from commit
+  history. These updates describe repository history without asserting capture origin.
+- Clarified file, recording, work, playback-rate, and source-origin semantics,
+  including the limits of file-size comparisons. The 29-field canonical schema
+  remains compatible; the work registry adds a separate optional identity layer.
+- Preserved all earlier fragment packets, Recording Timing v1, physical-reference
+  data, release manifests, and the v0.5.1 DOI snapshot. Timing validation retains
+  the documented correction and verifies the later Rec02 exclusion when
+  reconstructing the original pinned snapshot.
+
+Release preparation adds the five-file Recording Timing v2 packet and its
+validator/tests, updates the release documents, groups supporting documents and
+release receipts into folders, and binds the final tree in
+`releases/RELEASE_MANIFEST_V0.7.0.json`. It preserves all media, canonical
+indexes, work assignments, dated relationship packets and checksum entries.
+The final manifest is added alone after all other release bytes are fixed.
+The detailed entries below retain the scope and evidence of each earlier change.
+
 ### August 20 Rec02 historical backfill
 
 - Preserved filename sorting and the exact historical timing snapshot with a checksum-bound exclusion for this later ingest; 22 timing regression tests pass.

README.md

@@ -315,7 +315,7 @@ or drawing practices broadly.
 ## Status and coverage
 
 This card describes the current active data state represented at immutable
-repository revision `b0383afea4ceefe8c67ba5f3fc31f076c8a67858` and the separate immutable tagged and
+repository revision `521f4ee62ee3843cf36394499c10bf33f07dcaae` and the separate immutable tagged and
 DOI releases. The historical September 17 ingestion baseline remains preserved
 at metadata-bearing revision `21648a6a76b9174d32a4a3314cbe490219fc2151`;
 later documented corrections, the September 18 append, and the August 20
@@ -323,8 +323,9 @@ Rec02 backfill do not rewrite that historical receipt.
 
 | Snapshot | Standard | Pre-Standard | Indexed video files | Meaning |
 | --- | ---: | ---: | ---: | --- |
-| Current active data (revision pinned at `b0383afe…`) | 703 | 128 | **831** | Indexed media through 2026-09-18, including the August 20 Rec02 backfill; 2,176,788,154,698 bytes (approximately 2.18 TB), 1.98 TiB, and 61.102 encoded playback hours |
-| Current release [`v0.6.0`](https://huggingface.co/datasets/maxwellinked/time-lapse-artifacts/tree/v0.6.0) | 629 | 128 | **757** | Immutable tagged snapshot validated at `0f3e0559…`; indexed media through 2026-09-16, 2,108,662,791,273 bytes (approximately 2.11 TB), 1.92 TiB, and 58.371 encoded playback hours |
+| Current active data (revision pinned at `521f4ee6…`) | 703 | 128 | **831** | Indexed media through 2026-09-18, including the August 20 Rec02 backfill; 2,176,788,154,698 bytes (approximately 2.18 TB), 1.98 TiB, and 61.102 encoded playback hours |
+| Current release [`v0.7.0`](https://huggingface.co/datasets/maxwellinked/time-lapse-artifacts/tree/v0.7.0) | 703 | 128 | **831** | Immutable snapshot validated at `521f4ee6…`; 37 confirmed drawings and 360 recording links; 2,176,788,154,698 indexed video bytes and 61.102 encoded playback hours |
+| Previous release [`v0.6.0`](https://huggingface.co/datasets/maxwellinked/time-lapse-artifacts/tree/v0.6.0) | 629 | 128 | **757** | Immutable tagged snapshot validated at `0f3e0559…`; indexed media through 2026-09-16, 2,108,662,791,273 bytes (approximately 2.11 TB), 1.92 TiB, and 58.371 encoded playback hours |
 | DOI release [`v0.5.1`](https://huggingface.co/datasets/maxwellinked/time-lapse-artifacts/tree/v0.5.1) | 581 | 128 | **709** | Immutable, citable historical snapshot registered as [`10.57967/hf/10449`](https://doi.org/10.57967/hf/10449) |
 
 The Hub exposes two configurations, both using the split name `archive`:
@@ -396,7 +397,7 @@ To verify one Standard record without downloading its video, install
 
 ```bash
 python tools/download_verified.py tla-a66bdad6c903b89f \
-  --revision 'v0.6.0' \
+  --revision 'v0.7.0' \
   --check-only
 ```
 
@@ -458,6 +459,12 @@ not be flattened into the main 29-field table:
   identify 339 canonical fragments. They preserve grouping, order, completeness,
   and any noncanonical derivative relationship without adding derivative media
   to the active index.
+- [Recording Timing v2](Standard_Time_Lapses/Provenance/Recording_Timing_v2/README.md)
+  publishes observed MP4 creation timestamps for all 339 prospective recordings
+  across 33 confirmed works. Original device filenames support 163 local start
+  observations; 176 starts remain unknown. Creation/finalization timestamps and
+  filename-to-creation intervals do not establish exact capture duration or
+  active drawing time. This separate table preserves the canonical CSV schema.
 - [Recording Timing v1](Standard_Time_Lapses/Provenance/Recording_Timing/README.md)
   is an exploratory, revision-pinned layer for 186 fragments in six earlier
   dated manifests. It separates 22 direct filename-to-MP4-boundary observations
@@ -489,7 +496,7 @@ identity, authorship, and leakage-safe benchmark claims are not validated.
 Important biases remain: one creator and one evolving practice, different
 acquisition and documentation conditions across tiers, possible visual
 shortcuts from the workspace, and storage costs that make exhaustive inspection
-expensive. Consult [`Archive_Specifications.md`](Archive_Specifications.md) for
+expensive. Consult [`Archive_Specifications.md`](docs/Archive_Specifications.md) for
 acquisition details and known gaps.
 
 ## Integrity, rights, and license
@@ -528,20 +535,22 @@ incidental third-party content and ensure that downstream use complies with the
 [license notice](LICENSE). Commercial use outside those terms is not permitted.
 
 Validation procedures and current checks are documented in
-[`VALIDATION.md`](VALIDATION.md). Run the repository validators before
+[`VALIDATION.md`](docs/VALIDATION.md). Run the repository validators before
 publishing metadata, sidecar, checksum, or release changes.
 
 ## Citation and documentation
 
-The current `v0.6.0` release freezes a snapshot of 757 indexed video files validated at
-`0f3e0559ee3d6f5342b7043dd81c9b07ec123be1`. It is a separate immutable release and is not
-the object registered under the existing DOI.
+The current `v0.7.0` release freezes 831 indexed video files and the optional
+37-drawing, 360-link work registry validated at `521f4ee62ee3843cf36394499c10bf33f07dcaae`.
+The registry contains positive owner-confirmed memberships; 471 indexed records
+remain unlinked, and different work IDs are not independently verified negative
+pairs. This release is separate from the snapshot registered under the existing DOI.
 
 The DOI-backed `v0.5.1` release remains registered as
 [`10.57967/hf/10449`](https://doi.org/10.57967/hf/10449) and remains fixed at
 709 indexed video files. Cite the exact tag-resolved revision actually used. The BibTeX
 entry below intentionally describes the DOI-backed `v0.5.1` snapshot, not
-`v0.6.0`.
+`v0.7.0`.
 
 ```bibtex
 @dataset{maxwell_time_lapse_artifacts_2026_v0_5_1,
@@ -556,6 +565,10 @@ entry below intentionally describes the DOI-backed `v0.5.1` snapshot, not
 }
 ```
 
+Repository navigation: [supporting documentation](docs/README.md) and
+[release receipts](releases/README.md) are grouped in folders. Canonical media,
+metadata, schema, license and checksums retain their established paths.
+
 Core documentation:
 
 - [`metadata.csv`](metadata.csv) and
@@ -567,12 +580,13 @@ Core documentation:
 - [`Standard_Time_Lapses/Provenance/`](Standard_Time_Lapses/Provenance/README.md)
   and [`Physical_References/`](Physical_References/SCHEMA.md) — relationship
   evidence kept outside the active indexes.
-- [`Archive_Specifications.md`](Archive_Specifications.md) and
+- [`Archive_Specifications.md`](docs/Archive_Specifications.md) and
   [`Earlier_Archive_2012_2016/README.md`](Earlier_Archive_2012_2016/README.md)
   — acquisition scope, known gaps, and the offline holding.
-- [`VALIDATION.md`](VALIDATION.md), [`SHA256SUMS`](SHA256SUMS), and
-  [`RELEASE_MANIFEST_V0.6.0.json`](RELEASE_MANIFEST_V0.6.0.json) — validation,
-  fixity, and the current release receipt. The historical
-  [`RELEASE_MANIFEST_V0.5.1.json`](RELEASE_MANIFEST_V0.5.1.json) remains the DOI
+- [`VALIDATION.md`](docs/VALIDATION.md), [`SHA256SUMS`](SHA256SUMS), and
+  [`RELEASE_MANIFEST_V0.7.0.json`](releases/RELEASE_MANIFEST_V0.7.0.json) — validation,
+  fixity, and the current release receipt. Previous versioned manifests remain
+  unchanged. The historical
+  [`RELEASE_MANIFEST_V0.5.1.json`](releases/RELEASE_MANIFEST_V0.5.1.json) remains the DOI
   release receipt.
 - [`CHANGELOG.md`](CHANGELOG.md) — release history and post-release changes.

Standard_Time_Lapses/Provenance/Recording_Timing_v2/MANIFEST.json

@@ -0,0 +1,570 @@
+{
+  "schema": "recording-timing-observations/v2",
+  "dataset": "maxwellinked/time-lapse-artifacts",
+  "source_hub_revision": "521f4ee62ee3843cf36394499c10bf33f07dcaae",
+  "record_ids": [
+    "tla-00b52ab79e711cd7",
+    "tla-00cf93bdb9a0abbc",
+    "tla-01a7f190e090f433",
+    "tla-02320e062cb238ed",
+    "tla-026f9eaeaa7061d4",
+    "tla-02e93e4126081d1b",
+    "tla-03f59781f9953a45",
+    "tla-041001b3b207243c",
+    "tla-04e33e202f6f9811",
+    "tla-05c5c6e7b283d6ce",
+    "tla-0673777e4f27e1e9",
+    "tla-06b42c49789802b4",
+    "tla-07f8895f85d48261",
+    "tla-08603b7d034d579a",
+    "tla-0942d20c87a64fcf",
+    "tla-09499cb0c74b9e89",
+    "tla-09abec48aec96fa7",
+    "tla-0ad7ca82ee9e0081",
+    "tla-0b32e0e8155453e2",
+    "tla-0b39ac56b7e63539",
+    "tla-0dc5e3f65819948d",
+    "tla-0f8bad37a3982e85",
+    "tla-10c744cb86d89256",
+    "tla-110864db90ceef70",
+    "tla-11225f2077e490e9",
+    "tla-11747a288c538e27",
+    "tla-1275a1532ae4094a",
+    "tla-12c9c8d747984395",
+    "tla-12d89ac668e5ec67",
+    "tla-145c6dbffbc261a6",
+    "tla-14cb6e9872cf8a3a",
+    "tla-16851226c8132faa",
+    "tla-17368e60e182d164",
+    "tla-1834120f040c65c6",
+    "tla-1876f9a959f3fd45",
+    "tla-18b32fa72ca03e99",
+    "tla-18cd2a30e4e7113a",
+    "tla-18d5ff4a5e43ba8b",
+    "tla-194ef95f2cc4a7e2",
+    "tla-1b8df109b4192788",
+    "tla-1c4552ed0d031b79",
+    "tla-1d43d5f25376fbbe",
+    "tla-1d54b0764fe46efa",
+    "tla-1e02711fc268a776",
+    "tla-1e2d37355e0b5154",
+    "tla-1ef5d2196ca9ab84",
+    "tla-20af93d1d5136df9",
+    "tla-20bdc620313bd618",
+    "tla-211dcffd975c7737",
+    "tla-23b042f5846f84e6",
+    "tla-245fc4a6e141d2d1",
+    "tla-25fddf50105021ed",
+    "tla-26066542f17e7787",
+    "tla-262bfe2439260653",
+    "tla-2774b0b2aa1f86a1",
+    "tla-282b39525c86d624",
+    "tla-2979342d23ed96ef",
+    "tla-2b3cc71f11ea0151",
+    "tla-2c5d95b636c2f4cb",
+    "tla-2c6fc32bedddd950",
+    "tla-2f31f064cddb054e",
+    "tla-2f7eee1d712db8ff",
+    "tla-2f8b8e511e9967ed",
+    "tla-30bfd1088a90bc61",
+    "tla-30d4cc8e5bcb6415",
+    "tla-31bd5698398b9b7f",
+    "tla-32a834b3090db3a5",
+    "tla-32eb7cc954804a64",
+    "tla-3301210d35d1cefb",
+    "tla-34e870487eb436fd",
+    "tla-354fd1a7d9e4a251",
+    "tla-362785f3bb8defc4",
+    "tla-377a2836bcbb304b",
+    "tla-38105070dbce6908",
+    "tla-38d43af9e18859ab",
+    "tla-39beffdd6679c75e",
+    "tla-3a4ed6625d6aae32",
+    "tla-3ad1e302fb7d3988",
+    "tla-3adf012f9f23d1d4",
+    "tla-3b6f96e8af8870bd",
+    "tla-3ba764a8c7aa3e62",
+    "tla-3bc1cc553ba49f51",
+    "tla-3c3e53cf853c4a08",
+    "tla-3d92849a7d15acba",
+    "tla-3e01cce98d9d3ff3",
+    "tla-3ebe44bb17ce007a",
+    "tla-3ff09ca58e0008d8",
+    "tla-401f1726ba9f2aed",
+    "tla-4096364256e10d0f",
+    "tla-40a46d72343d54b1",
+    "tla-417064bc01850b05",
+    "tla-43696f23545c589c",
+    "tla-4475991d0615f3d8",
+    "tla-4496e6a8b66778ee",
+    "tla-44c4792cdfbd315c",
+    "tla-454c0845c7f0e755",
+    "tla-456a71e6401d5c14",
+    "tla-45d3ac2ddabd3408",
+    "tla-46456c57eab70512",
+    "tla-464bd05e82c56c21",
+    "tla-46790887b96058b1",
+    "tla-470481d9c7f58a19",
+    "tla-47a3a6ff70817119",
+    "tla-47dc41d1fb71b073",
+    "tla-483a63272a074941",
+    "tla-4900fcfa1a3fa1fe",
+    "tla-4929d1ca62fbdd7d",
+    "tla-4a1fcb9887d9e942",
+    "tla-4bed8123631947db",
+    "tla-4cdc4e83c07f8786",
+    "tla-4d12ccdb5ffafeec",
+    "tla-4db13002f09ad61e",
+    "tla-4e5f93cba9dfca5b",
+    "tla-508f85612815a7d5",
+    "tla-50a36e4ed2f507a6",
+    "tla-50eb0821356da91b",
+    "tla-513029f73b85e398",
+    "tla-5262a759aaff80f1",
+    "tla-53c843f22fb33003",
+    "tla-54319fdfab95d90f",
+    "tla-56470d01d9d3e2e8",
+    "tla-565c1c54724a97b0",
+    "tla-5698d3185835db4f",
+    "tla-56d81a0cc1a81233",
+    "tla-57fe7ceae2133b5a",
+    "tla-59a68e75bce1a3c6",
+    "tla-5a0ef709e9bc885a",
+    "tla-5a68a8fcab80d9ae",
+    "tla-5ad10ca2397ccaf1",
+    "tla-5b038a2727ab495a",
+    "tla-5c33f1aafdadd30c",
+    "tla-5c6b8329390d241c",
+    "tla-5e157f0ecb7d0f98",
+    "tla-5e2c99d8df5cb3c9",
+    "tla-5e5239cecc8b4326",
+    "tla-61018ac76b4a004c",
+    "tla-6246ce8807d333b4",
+    "tla-64ef02590a813dbf",
+    "tla-65062a6de4daffd3",
+    "tla-6512f4385f44f7a0",
+    "tla-65cbedac0ae6a1bc",
+    "tla-69c2987ba28ab638",
+    "tla-6a148955e1675888",
+    "tla-6a5ffe391360ab0e",
+    "tla-6bc19650a2e34adf",
+    "tla-6de53d09cd5e3a08",
+    "tla-6df25b7f11bf68b3",
+    "tla-6f513dbb4a91576b",
+    "tla-6f680d642f6572d5",
+    "tla-731496e7b09037d3",
+    "tla-7316b28bdb2d9d5b",
+    "tla-74167ccfc2d1743f",
+    "tla-7467f78476582d54",
+    "tla-7503f7079ae3c857",
+    "tla-75af198c44dae736",
+    "tla-7645d26722ce0c52",
+    "tla-77ba1756d1936eaa",
+    "tla-78906b7422a8cd86",
+    "tla-79a64f95d9cc73f0",
+    "tla-79ca8481c7b9320c",
+    "tla-7a0f8d8e35ee24bf",
+    "tla-7b6310d9ff7357cd",
+    "tla-7b85a01ca0e18169",
+    "tla-7ca6504e73db368d",
+    "tla-7e032b5da08a469a",
+    "tla-7e98dd2c559c1563",
+    "tla-7eeb039fbdd4ee00",
+    "tla-7f9cb7b068dcc8dd",
+    "tla-7fa709a53c1c9245",
+    "tla-7fd2e585803f88c6",
+    "tla-811a04bd1233342b",
+    "tla-81c1a9727ffea3c3",
+    "tla-81d5442a6ba64d99",
+    "tla-835902e6830028a9",
+    "tla-85474ea2a0a6ea02",
+    "tla-8617f3db8d71a151",
+    "tla-8632fb2b58b106ee",
+    "tla-86a7f03baaa005c4",
+    "tla-86ae323850427555",
+    "tla-86aed0b2d1ca0721",
+    "tla-87509964b3e7cba4",
+    "tla-8798576f14ef3da8",
+    "tla-87e810a2a3b2bc4d",
+    "tla-88182ce0f41a5ff8",
+    "tla-88b7ec1b70284231",
+    "tla-88e9733298d57ae5",
+    "tla-8a6267aff9e3e61b",
+    "tla-8aa4a4cd49f81df6",
+    "tla-8b40266d9be4785c",
+    "tla-8c4a7b81e2136dbf",
+    "tla-8c655ece3d27b2ce",
+    "tla-8d4e89f78b6cfb9d",
+    "tla-8e7d35b6f9f5130e",
+    "tla-8ef2a90ad59dda4a",
+    "tla-8f0af1d434763742",
+    "tla-8f4b376c08eac5a1",
+    "tla-8f9776522fa0b340",
+    "tla-910e4ec8ecee084a",
+    "tla-92bfd8fe55690270",
+    "tla-93df87ac61778141",
+    "tla-948ffd8b2d6643f8",
+    "tla-9564ec2637502bb3",
+    "tla-96dc7585f91aca1e",
+    "tla-9883ed1508acb4b0",
+    "tla-9a9d7688deaa4e6e",
+    "tla-9ac7520f5e562c78",
+    "tla-9ba7b5c7ecaa775d",
+    "tla-9d4ea22dcd409388",
+    "tla-9d57a779a635a985",
+    "tla-9dafd3263803f6b9",
+    "tla-9dcf6040d32ef2fb",
+    "tla-9e27cf3a56cf5680",
+    "tla-9f1f24aca1b3e674",
+    "tla-9f8e45e3127a731f",
+    "tla-9fc099b25a5a192b",
+    "tla-a09fe6c9a3857a32",
+    "tla-a0a9b5baf7a9812e",
+    "tla-a1ada0bd22aec824",
+    "tla-a24032b0de93ce43",
+    "tla-a35e389750db2f5f",
+    "tla-a3638f74fe972162",
+    "tla-a403a331a818fbc0",
+    "tla-a55d1f4ccc0f702f",
+    "tla-a5d5665d0e48d447",
+    "tla-a60a8c756450d3b9",
+    "tla-a7ab494da0850d11",
+    "tla-a87d454cb2652272",
+    "tla-a8843702bc3d141c",
+    "tla-a9ee206b06934c28",
+    "tla-acb051b894ce5eba",
+    "tla-ad95c0c67d1efc62",
+    "tla-aded8801ada0d700",
+    "tla-aecd8e8a26eed1d3",
+    "tla-aeff3b6b7a6e7038",
+    "tla-af4ebbafb56ce655",
+    "tla-b05c35689a6c53fe",
+    "tla-b1a7d42d457406fe",
+    "tla-b2424a7706bda7ab",
+    "tla-b34572c8517ac79e",
+    "tla-b35817d1ba2f4bb3",
+    "tla-b835b38a4181d6d5",
+    "tla-b887c8d3a90189f8",
+    "tla-ba4071a415e1b3c6",
+    "tla-bbb65ede9e37e03c",
+    "tla-bca17a285a5947ad",
+    "tla-bd8df38e9d392508",
+    "tla-be89de5264bb0e41",
+    "tla-bed24891b6405ece",
+    "tla-bedfd41a58c92d44",
+    "tla-bf58803f9ae43d74",
+    "tla-c0df274c30256a7b",
+    "tla-c0ebf26e94082e43",
+    "tla-c12483bf506121a3",
+    "tla-c2177350b31601dd",
+    "tla-c3f99556c51ee3e5",
+    "tla-c4f5e807e89a58b8",
+    "tla-c541f2e7d9dec5ff",
+    "tla-c6bd5251141e7b0d",
+    "tla-c8af83ccb0e77061",
+    "tla-c948695429017702",
+    "tla-c97640e61d262b7c",
+    "tla-c9c6674dfb2f1155",
+    "tla-c9f27606a616b6b0",
+    "tla-cb7dddd614179ee5",
+    "tla-cbaf902dfe2dd5a7",
+    "tla-cc3262374aea053f",
+    "tla-cc820b6e9e73e689",
+    "tla-d0db010424d477ad",
+    "tla-d2197ffa4161e514",
+    "tla-d24b6ae523e671d8",
+    "tla-d3124643912f294d",
+    "tla-d3a9e300c5a575ef",
+    "tla-d4ab6cee188b9215",
+    "tla-d611b60118251c73",
+    "tla-d66db2070080cfe3",
+    "tla-d68b9f644038c625",
+    "tla-d6994d03a567cb1c",
+    "tla-d69dbb9d240c956c",
+    "tla-d73fc6b8e61bb393",
+    "tla-d743458fa7a21dc6",
+    "tla-d743accc0cc418b4",
+    "tla-d7e47c3d42a56403",
+    "tla-d985c298e56b626b",
+    "tla-d9de4be69773da1c",
+    "tla-da40a4450a4f426a",
+    "tla-dab77d429267838b",
+    "tla-db8e5247b8ffbfcd",
+    "tla-dbaf64c190fc756a",
+    "tla-dbe19af92332214b",
+    "tla-dcf04f455d2a9e36",
+    "tla-dd25929bfc03e0f3",
+    "tla-ddddbbef44ba66a1",
+    "tla-dfa938d46e9a04fe",
+    "tla-dfeb6702936333a5",
+    "tla-e015b4313f37e64c",
+    "tla-e19f0677fc330491",
+    "tla-e1a8b76fd1594d16",
+    "tla-e1c799958f3cf010",
+    "tla-e26143a32358d010",
+    "tla-e31f5059a75da52c",
+    "tla-e5257635351063dc",
+    "tla-e58e2028e5d54c2f",
+    "tla-e6314ca067353edc",
+    "tla-e7bc7bffd35a1444",
+    "tla-e9f705e9d7a51947",
+    "tla-ea0a1d7303fc824a",
+    "tla-ea2fee303e235c2b",
+    "tla-ea32a9a1da6befb7",
+    "tla-eb614457b8f6c8f0",
+    "tla-ebb3ad040a00641e",
+    "tla-ebbce867454d61ea",
+    "tla-ec24daaa3a4aeb7e",
+    "tla-ed8a317bfe550db7",
+    "tla-ee82a7aea89506e2",
+    "tla-ef01d04a8a49092a",
+    "tla-ef3be26a77e1cc8a",
+    "tla-efaed2ac03dc2830",
+    "tla-f0a283b93c83e0dd",
+    "tla-f0cf9d4396d95b7e",
+    "tla-f15bb9f1079aa292",
+    "tla-f26a33cb42e6a4f0",
+    "tla-f4177a8e599895a7",
+    "tla-f44008804f060fc7",
+    "tla-f4659f0da42cf8e6",
+    "tla-f4d8d1ab6ac76973",
+    "tla-f538f285d08ad1c8",
+    "tla-f58a3f3919c3bf82",
+    "tla-f72deb54ecab1034",
+    "tla-f766bfcd569963c5",
+    "tla-f7de3d070ae671be",
+    "tla-f92022de10e0e792",
+    "tla-f9c3600edc5d2227",
+    "tla-fb4dd4a2c9eb55d6",
+    "tla-fcfd8e78247c4dfc",
+    "tla-fde0d31d776e4aeb",
+    "tla-fdf87bb04f5e84ab",
+    "tla-feb83a44b3b6ef03",
+    "tla-fed45dc327f5b10e",
+    "tla-ffc8e45692100bf3"
+  ],
+  "filename_timezone": "America/New_York",
+  "created_date": "2026-09-19",
+  "counts": {
+    "recordings": 339,
+    "work_ids": 33,
+    "filename_starts": 163,
+    "unknown_starts": 176,
+    "format_creation_tags": 339,
+    "video_creation_tags": 316,
+    "creation_tag_matches": 316,
+    "creation_tag_mismatches": 0,
+    "clock_conflicts": 0
+  },
+  "scope": "Frozen prospective cohort; direct timestamp observations and filename interpretation only. Missing starts stay unknown. Historical Recording Timing v1 remains unchanged.",
+  "retained_local_audits": [
+    {
+      "source_audit_id": "ingest_20260827",
+      "size_bytes": 36337,
+      "sha256": "ddef8b59b14a491a6490d481d7acfd4f5f799c601247807268af0bda997bade6",
+      "retention": "original audit retained locally; timing fields projected in observations.json",
+      "total_rows": 27,
+      "included_rows": 22
+    },
+    {
+      "source_audit_id": "ingest_20260829",
+      "size_bytes": 27954,
+      "sha256": "fe89f2d0fe7b3cb1606f60d5772197fc1d0c57821a51782d3ecd3f18c47882d9",
+      "retention": "original audit retained locally; timing fields projected in observations.json",
+      "total_rows": 19,
+      "included_rows": 19
+    },
+    {
+      "source_audit_id": "ingest_20260830",
+      "size_bytes": 56981,
+      "sha256": "7d0cc82763bf8e2026fd7c8de078cb0ccba70b774ab65f0867b9b8a77a281d20",
+      "retention": "original audit retained locally; timing fields projected in observations.json",
+      "total_rows": 39,
+      "included_rows": 39
+    },
+    {
+      "source_audit_id": "ingest_20260831",
+      "size_bytes": 46851,
+      "sha256": "91f15a43af2346a302b66dde18fa96f8583c61b6de6dfb1389bb4ed01a92a6c8",
+      "retention": "original audit retained locally; timing fields projected in observations.json",
+      "total_rows": 32,
+      "included_rows": 32
+    },
+    {
+      "source_audit_id": "ingest_20260901",
+      "size_bytes": 19217,
+      "sha256": "8df0d8eb9a329e9d60dab9db9c2e375df1bb99343f8f26eed214f3ba1f48137b",
+      "retention": "original audit retained locally; timing fields projected in observations.json",
+      "total_rows": 13,
+      "included_rows": 13
+    },
+    {
+      "source_audit_id": "ingest_20260902",
+      "size_bytes": 46844,
+      "sha256": "4a94d412299388bc88cafd5c0a33b3383be04e30d0b03ead997370945df47c1c",
+      "retention": "original audit retained locally; timing fields projected in observations.json",
+      "total_rows": 32,
+      "included_rows": 32
+    },
+    {
+      "source_audit_id": "ingest_20260902_evening",
+      "size_bytes": 42498,
+      "sha256": "f6fe34c60f8e2295c1cd9fa7a489aa82bb9b314009276e9b2ff10b7688631043",
+      "retention": "original audit retained locally; timing fields projected in observations.json",
+      "total_rows": 29,
+      "included_rows": 29
+    },
+    {
+      "source_audit_id": "ingest_20260914",
+      "size_bytes": 58154,
+      "sha256": "c19704937d6ae1dcf5dbdc6d4af8905742b7ec915dc62958af77afef66c365d3",
+      "retention": "original audit retained locally; timing fields projected in observations.json",
+      "total_rows": 32,
+      "included_rows": 32
+    },
+    {
+      "source_audit_id": "ingest_20260915",
+      "size_bytes": 41128,
+      "sha256": "948797b20449b9c9ff100b3d220aa59a1590916e4bba20f32baeed95d6a69d45",
+      "retention": "original audit retained locally; timing fields projected in observations.json",
+      "total_rows": 23,
+      "included_rows": 23
+    },
+    {
+      "source_audit_id": "ingest_20260916",
+      "size_bytes": 38868,
+      "sha256": "3732b1e55ffd7ae0475583d0fb20a207e38f54d149f8301e9c03882a5ad156ee",
+      "retention": "original audit retained locally; timing fields projected in observations.json",
+      "total_rows": 25,
+      "included_rows": 25
+    },
+    {
+      "source_audit_id": "ingest_20260916_2043",
+      "size_bytes": 32933,
+      "sha256": "a0f696ed3db24af616af91b1e0b5158ee1310feaca2057dad8918b43e9e9fe2b",
+      "retention": "original audit retained locally; timing fields projected in observations.json",
+      "total_rows": 21,
+      "included_rows": 21
+    },
+    {
+      "source_audit_id": "ingest_20260917_1140",
+      "size_bytes": 37710,
+      "sha256": "d7a45836fd82f65abeec857a8ecfa1af22e846907bbd2e9a49f93c228a90c52a",
+      "retention": "original audit retained locally; timing fields projected in observations.json",
+      "total_rows": 23,
+      "included_rows": 23
+    },
+    {
+      "source_audit_id": "ingest_20260918",
+      "size_bytes": 42415,
+      "sha256": "c0fe98dce0e406ba21afedda7475f25a806445deeebd06b4e61bf49e35de4e58",
+      "retention": "original audit retained locally; timing fields projected in observations.json",
+      "total_rows": 29,
+      "included_rows": 29
+    }
+  ],
+  "source_files": [
+    {
+      "path": "metadata.csv",
+      "size_bytes": 569597,
+      "sha256": "5f2554c6ec20a137031bdfc180953530bcaef8d0baad35c7c222a42670b6ec6d"
+    },
+    {
+      "path": "SHA256SUMS",
+      "size_bytes": 121519,
+      "sha256": "c7eb7912698788eca2d64550f935e432106af2fb79c89fb778e946ccd46b06ff"
+    },
+    {
+      "path": "Work_Identity/works.csv",
+      "size_bytes": 18342,
+      "sha256": "a6b65ff2c0045d9e17861f9a7d06c86856a951a39e8edca7a67a4df1aeab311f"
+    },
+    {
+      "path": "Work_Identity/work_record_links.csv",
+      "size_bytes": 107157,
+      "sha256": "6fe0dace5366fda655e07c15a6370dcfb324f96a81eaebf973ad1282be559ded"
+    },
+    {
+      "path": "Standard_Time_Lapses/Provenance/2026-08-27/fragment_sequence_relationships.csv",
+      "size_bytes": 15322,
+      "sha256": "62b1fd9add3be03e3e7198df8f107a416741682c79878b7622c6ea1c34ec4ce8"
+    },
+    {
+      "path": "Standard_Time_Lapses/Provenance/2026-08-29/fragment_sequence_relationships.csv",
+      "size_bytes": 12748,
+      "sha256": "9648cf53ce35dd30b6c0c8c3c223c4ed68aea9a03d2e7f4843ad6f39e04c7bb7"
+    },
+    {
+      "path": "Standard_Time_Lapses/Provenance/2026-08-30/fragment_sequence_relationships.csv",
+      "size_bytes": 26023,
+      "sha256": "427b416c617c9bf9400ec574452902180fec94c8a0dbe8fc1526ece7a1bdb50c"
+    },
+    {
+      "path": "Standard_Time_Lapses/Provenance/2026-08-31/fragment_sequence_relationships.csv",
+      "size_bytes": 21413,
+      "sha256": "e006ba8b30f31b14f750992455c74459a88d50d40e9b4fe57623c5a8dd332272"
+    },
+    {
+      "path": "Standard_Time_Lapses/Provenance/2026-09-01/fragment_sequence_relationships.csv",
+      "size_bytes": 8821,
+      "sha256": "200d7f4e38d06caf7a472dbaec2b7bae62a3dd1b4fce808b638391b2060a957a"
+    },
+    {
+      "path": "Standard_Time_Lapses/Provenance/2026-09-02/fragment_sequence_relationships.csv",
+      "size_bytes": 40663,
+      "sha256": "066ababd2a40c2be23087588603dc680adadd54e7cbb6708ab238c22e216932e"
+    },
+    {
+      "path": "Standard_Time_Lapses/Provenance/2026-09-14/fragment_sequence_relationships.csv",
+      "size_bytes": 25195,
+      "sha256": "bbe3760b731134be34caaf70df463632578be1772ddbedf648889e0820f26195"
+    },
+    {
+      "path": "Standard_Time_Lapses/Provenance/2026-09-15/fragment_sequence_relationships.csv",
+      "size_bytes": 17572,
+      "sha256": "5c7d6a32ba3a9b2c3e6ab4da660da3e73601b0aa8a11067d75084a82c698c1ad"
+    },
+    {
+      "path": "Standard_Time_Lapses/Provenance/2026-09-16.2043/fragment_sequence_relationships.csv",
+      "size_bytes": 16585,
+      "sha256": "a0c8746421029d4ae53e03e9b58c32bfb37b61835b76239e95014629cf1e1d2e"
+    },
+    {
+      "path": "Standard_Time_Lapses/Provenance/2026-09-16/fragment_sequence_relationships.csv",
+      "size_bytes": 19653,
+      "sha256": "b54589508dea32461d793ab21e2f69d8b3fc2b708469e313b03f24017a46aa66"
+    },
+    {
+      "path": "Standard_Time_Lapses/Provenance/2026-09-17/fragment_sequence_relationships.csv",
+      "size_bytes": 18101,
+      "sha256": "018cbd288f151d5a770d96c1897bce9da6d0aff5afd1df10f1eb8c0c047aff4f"
+    },
+    {
+      "path": "Standard_Time_Lapses/Provenance/2026-09-18/fragment_sequence_relationships.csv",
+      "size_bytes": 19011,
+      "sha256": "927eac99a06556281824b1925f124e744f5b33684711b6d3a8851658a54504b7"
+    }
+  ],
+  "packet_files": [
+    {
+      "path": "README.md",
+      "size_bytes": 4396,
+      "sha256": "fc44f140c5c46f1980f72727a4413e687f7a6933a079dc8b899ea2bac7bc69d9"
+    },
+    {
+      "path": "SCHEMA.md",
+      "size_bytes": 3678,
+      "sha256": "0a62a408336573df2ce7011541ba68f3bfdd09317bdc53788713adf1b38db0b2"
+    },
+    {
+      "path": "observations.json",
+      "size_bytes": 147061,
+      "sha256": "aa2740a72b5068655e4d99e5c05c244a915ec22235293c970774d4fa936991d3"
+    },
+    {
+      "path": "recording_timing.csv",
+      "size_bytes": 207623,
+      "sha256": "c7258515aa3bc32e9336df7a17e0f4dd50e4060bc83acb54daaa803cc821f1d4"
+    }
+  ]
+}

Standard_Time_Lapses/Provenance/Recording_Timing_v2/README.md

@@ -0,0 +1,79 @@
+# Recording Timing v2: observed timestamps
+
+This optional sidecar brings the retained per-record timing evidence into the
+repository for **339 prospective Standard recordings across 33 confirmed works**.
+It is a frozen snapshot of the cohort at `521f4ee62ee3843cf36394499c10bf33f07dcaae`.
+The canonical 29-field metadata schema and the historical
+[Recording Timing v1](../Recording_Timing/README.md) packet are unchanged.
+
+Use [recording_timing.csv](recording_timing.csv), joined by `record_id`.
+Its `work_id` comes from the owner-confirmed registry; it does not create work
+assignments. Current paths include the documented September 1 `14:13` correction.
+The original v1 packet retains its historical paths, estimates and conflict.
+
+| Observation | Coverage |
+| --- | ---: |
+| Literal MP4 format creation timestamp | 339 |
+| Literal video-stream creation timestamp | 316 |
+| Format/video timestamps agree, where both were retained | 316 |
+| Start interpreted from an original `VID_YYYYMMDD_HHMMSS.mp4` filename | 163 |
+| Start unknown | 176 |
+
+The 23 September 17 audits retained a format creation tag without a separate
+video-stream creation tag. Those video-stream fields stay blank. No observed
+format/video disagreement or negative filename-to-creation interval occurs in
+this snapshot; that is not proof that the device clock was accurate.
+
+## What the times mean
+
+The `VID_...` filename supplies a local clock observation interpreted as a
+recording start in `America/New_York`. The CSV includes the explicit UTC offset
+and its UTC conversion. This is filename evidence, not an independently calibrated
+capture clock. Other source filenames do not establish a start.
+
+The embedded MP4 `creation_time` is a literal creation/finalization observation.
+It is **not a guaranteed recording-stop timestamp**. Where a filename start
+exists, `filename_to_creation_seconds` subtracts that start from the format tag.
+It is an observed clock interval, not a validated capture duration or drawing time.
+Missing starts and intervals remain blank. No start estimates are carried forward
+from v1, and neither encoded frame rate nor `com.android.capture.fps` is used
+to reconstruct elapsed time.
+
+Creator-supplied canonical date/time labels describe drawing/group completion;
+they remain in `metadata.csv` and are not substituted for per-record start/end
+times. This packet does not establish continuous capture, time spent actively
+drawing, or pen contact. Complete group membership does not imply gapless capture.
+Historical recordings outside the prospective cohort, including August 20 Rec02,
+are outside this packet's scope. Packet PTS/DTS are not wall-clock timestamps.
+
+## Evidence and reproduction
+
+[observations.json](observations.json) publishes the selected raw fields, source
+filenames and media SHA-256/size bindings. [MANIFEST.json](MANIFEST.json) binds
+that projection, this table and documentation, all pinned repository join inputs,
+and the exact SHA-256/size receipts of the 13 retained local ingest audits.
+The seven older audit receipts match v1's historical source manifest. The original
+local audit files are not bundled; the published projection is an evidence export,
+not a fresh probe of every remote video. Local absolute paths are omitted.
+
+Each observation was matched by permanent record ID, ordinary SHA-256 and size
+to canonical metadata, published checksum and relationship records; Xet identities
+were checked against the revision-bound remote inventory. Twelve corrected paths
+are joined through unchanged record IDs and fixity, without rewriting history.
+
+Run from a checkout containing this packet:
+
+```sh
+python tools/validate_recording_timing_v2.py --root .
+```
+
+The default checks the frozen cohort against current identity joins and reports
+how many complete source-file receipts still match; unrelated later ingests do not
+expand this packet. To require every exact historical input byte, additionally
+provide `--source-root` pointing to a checkout of `521f4ee62ee3843cf36394499c10bf33f07dcaae`.
+The validator recomputes all table fields from the published observations and
+checks frozen cohort and group membership. It does not re-read private audits,
+download the videos, or repeat their original decode checks.
+
+Field definitions are in [SCHEMA.md](SCHEMA.md). Release fixity also binds the
+validator and the rest of the repository through the release manifest.

Standard_Time_Lapses/Provenance/Recording_Timing_v2/SCHEMA.md

@@ -0,0 +1,39 @@
+# Recording Timing v2 schema
+
+UTF-8 CSV with one row per prospective canonical recording. Empty strings mean
+unknown or not observed, never zero. Rows are sorted by current canonical path.
+The packet is frozen at the source revision declared in `MANIFEST.json`.
+
+| Fields | Definition |
+| --- | --- |
+| `record_id`, `work_id` | Existing permanent recording identity and owner-confirmed work membership at the pinned revision. |
+| `file_path`, `source_hub_revision` | Canonical media path and the exact repository snapshot used for current metadata, registry and checksum joins. |
+| `relationship_path`, `relationship_source_revision` | Published fragment sidecar and its declared source revision. Historical sidecar paths may precede documented identity-preserving corrections. |
+| `sequence_position`, `sequence_count` | One-based position and group size copied from the relationship sidecar; every work in this packet has the complete 1..N membership. |
+| `sha256`, `size_bytes`, `hub_xet_hash` | Ordinary source SHA-256, byte length and separately identified Xet hash. These are not interchangeable hash algorithms. |
+| `source_audit_id`, `source_filename` | Logical retained-audit identifier and original local basename, without its absolute path. |
+| `filename_start_local` | Strict `VID_YYYYMMDD_HHMMSS.mp4` date/time interpreted in the manifest's IANA timezone; ISO 8601 with explicit offset. Nonmatching names leave this empty. Ambiguous or nonexistent local clock times are rejected. |
+| `filename_start_utc` | UTC conversion of the filename observation. |
+| `filename_start_basis` | `device_filename_interpreted_in_declared_timezone` or `unknown`. No inferred or modeled start is substituted. |
+| `format_creation_time_utc` | Normalized literal MP4 format `creation_time`. Required in this frozen packet; creation/finalization observation, not guaranteed capture stop. |
+| `video_creation_time_utc` | Normalized literal video-stream creation tag, when retained. A missing tag remains empty. |
+| `creation_tag_agreement` | `match`, `mismatch`, or `not_observed` when no video-stream tag was retained. |
+| `filename_to_creation_seconds` | Exact decimal difference: format creation UTC minus filename-start UTC. Empty when the start is unknown. This is an observed clock interval, not a validated capture duration. Negative differences remain negative. |
+| `timing_status` | `filename_start_and_creation_observed`, `creation_only`, or `clock_conflict` for tag mismatch or a negative interval. |
+
+The `observations.json` projection preserves raw timestamp strings alongside
+`record_id`, `source_audit_id`, `source_filename`, `source_sha256` and
+`source_size_bytes`. Different audit formats used nested `format_tags`/`video_tags`
+or named timestamp fields; only the literal retained values are projected.
+The format field also appeared as `embedded_creation_time_utc` in the September 18
+audit. That audit's video field was `video_stream_creation_time_utc`.
+
+`MANIFEST.json` contains the frozen record IDs, snapshot revision, filename timezone, coverage counts,
+retained-audit receipts, source-file receipts and packet-file receipts. It does
+not hash itself; the enclosing release manifest binds it. Public validation proves
+consistency with the exported observations and recording-level repository joins.
+An explicit `--source-root` also requires all original source-file receipts;
+default validation reports those matches separately and permits unrelated later
+index additions without changing the frozen cohort. Verifying
+the projection against the private original audits requires those retained files.
+The builder verified all 13 originals when producing this packet.

Archive_Specifications.md → docs/Archive_Specifications.md

@@ -1,7 +1,7 @@
-# Archive Specifications
-
-## Scope and Protocol Version
-
+# Archive Specifications
+
+## Scope and Protocol Version
+
 These specifications apply to recordings and drawings created beginning July
 13, 2025 unless a metadata row documents a deviation. Two protocol identifiers
 now distinguish the canonical workflows:
@@ -26,47 +26,47 @@ dates and `RecNN` alone are insufficient. Historical MP4s may represent one
 recording or may combine multiple recordings, including through InShot. This is
 a file-specific possibility, not a claim that every historical file is
 compiled. The distinction is illustrated by the prospective
-[`2026-08-27` packet](Standard_Time_Lapses/Provenance/2026-08-27/README.md)
+[`2026-08-27` packet](../Standard_Time_Lapses/Provenance/2026-08-27/README.md)
 and the separate
-[June 18–30 historical relationship](Standard_Time_Lapses/Provenance/Historical_Relationships/2026-06-18--2026-06-30-fountain-pen-30x40.md).
+[June 18–30 historical relationship](../Standard_Time_Lapses/Provenance/Historical_Relationships/2026-06-18--2026-06-30-fountain-pen-30x40.md).
 
 The identifier records the governing workflow. It does not imply that every
 published file has identical encoded dimensions, orientation, codec, audio, or
 post-processing history.
-
-## Capture Configuration
-
+
+## Capture Configuration
+
 The owner-confirmed capture default established under the earlier Standard
 workflow, and inherited by the prospective fragment-sequence workflow unless a
 row documents a deviation, is:
-
-- Device: Samsung Galaxy S23 Ultra, model `SM-S918U`
-- Application: Framelapse 2; observed current version 11.7
-- Logical camera: Rear (Main), 1.8x
-- Nominal capture interval: 0.2 seconds
-- Capture orientation intent: Landscape
-- Capture resolution class: 2160p UHD (4K)
-- Still-image size: 4000 × 3000
-
+
+- Device: Samsung Galaxy S23 Ultra, model `SM-S918U`
+- Application: Framelapse 2; observed current version 11.7
+- Logical camera: Rear (Main), 1.8x
+- Nominal capture interval: 0.2 seconds
+- Capture orientation intent: Landscape
+- Capture resolution class: 2160p UHD (4K)
+- Still-image size: 4000 × 3000
+
 The 0.2-second interval is a protocol-level nominal setting, not a confirmed
 measurement for every Standard recording. It does not by itself establish a
 calibrated real-time basis for any record. The separate exploratory
-[recording-timing sidecar](Standard_Time_Lapses/Provenance/Recording_Timing/README.md)
+[recording-timing sidecar](../Standard_Time_Lapses/Provenance/Recording_Timing/README.md)
 documents a narrower empirical calibration for one observable recording
 profile.
-
-AE/WB lock, autofocus, and stabilization are owner-reported for certainly the
-majority of this period, not confirmed as universal per-record facts. Deviations
-must be recorded prospectively and must not be filled retrospectively by guess.
-
-### Capture versus published encoding
-
-Capture orientation and stored pixel orientation are separate properties.
-`metadata.csv` fields `width_px`, `height_px`, and `orientation` describe the
-published encoded file. Many canonical files are stored as portrait video,
-including records that historical evidence identifies as rotations or crops of
-landscape sources.
-
+
+AE/WB lock, autofocus, and stabilization are owner-reported for certainly the
+majority of this period, not confirmed as universal per-record facts. Deviations
+must be recorded prospectively and must not be filled retrospectively by guess.
+
+### Capture versus published encoding
+
+Capture orientation and stored pixel orientation are separate properties.
+`metadata.csv` fields `width_px`, `height_px`, and `orientation` describe the
+published encoded file. Many canonical files are stored as portrait video,
+including records that historical evidence identifies as rotations or crops of
+landscape sources.
+
 Do not infer a rotation, crop, or transcode solely from dimensions. Such a
 transformation should be asserted only when supported by provenance evidence.
 
@@ -76,9 +76,9 @@ requires evidence about that file's origin. File size and container or stream
 metadata can corroborate provenance, but cannot independently prove drawing
 membership, direct-device origin, or an untouched source. Do not assign a cause
 to a smaller file without supporting comparisons.
-
-### Acquisition evidence and canonical representation
-
+
+### Acquisition evidence and canonical representation
+
 Under `standard-2026-08-27`, Framelapse source recordings are retained unchanged
 as acquisition evidence and each source file has its own canonical metadata
 row. Grouping, file order, retained-sequence completeness, and derivative
@@ -94,16 +94,16 @@ Under `standard-2026-08-27`, all `RecNN` members in one prospective grouping
 share the documented finish date and finish time of the complete
 grouping/physical work. That timestamp is not the individual end time of each
 fragment. `RecNN` records chronological position within the group.
-
+
 A 2160 × 3840 portrait H.264, 30-fps InShot processing profile is documented as
 a candidate. It does not become a canonical protocol boundary until one complete
 natural drawing passes fragment-order, join, duration, stream, hash, and manifest
 verification and receives explicit creator approval. Existing 60-fps canonical
 records remain unchanged. The encoded 30-fps value is a playback property, not
 the real capture interval.
-
-## Timing and Calibration Status
-
+
+## Timing and Calibration Status
+
 The current protocol documentation does not provide a complete calibrated time
 base for motor-control or physical-trajectory measurement. The nominal
 0.2-second setting records the intended protocol; the interval actually used
@@ -120,16 +120,16 @@ physical capture constant. Its two-second start allowance is an operational
 review threshold rather than a proven semantic error bound.
 
 In particular, the following may still be unknown for a recording:
-
-- confirmed per-record frame-capture interval
-- real drawing-session duration
-- time-lapse acceleration factor
-- source-frame timestamps
-- removed pauses or edit decisions
-- dropped-frame history
-- camera model, lens, and mount geometry
-- pixel-to-physical coordinate mapping or homography
-
+
+- confirmed per-record frame-capture interval
+- real drawing-session duration
+- time-lapse acceleration factor
+- source-frame timestamps
+- removed pauses or edit decisions
+- dropped-frame history
+- camera model, lens, and mount geometry
+- pixel-to-physical coordinate mapping or homography
+
 `encoded_frame_rate` is playback rate only. It must not be treated as original
 drawing-time sampling. The timing sidecar uses decoded frame count only inside
 its separately documented empirical model; it does not recover source-frame
@@ -139,40 +139,40 @@ Canonical `duration_seconds` remains encoded playback duration. The timing
 model uses separate timestamp-boundary evidence and probed frame counts; it
 does not reinterpret encoded duration or `encoded_frame_rate` as wall-clock
 time.
-
-## Drawing Surfaces
-
-### 9 × 12 in
-
-- Strathmore 300 Series Bristol
-- Smooth surface
-- 100 lb (270 g/m²)
-- Acid free
-
-### 11 × 14 in
-
-- Strathmore 300 Series Bristol
-- Smooth surface
-- 100 lb (270 g/m²)
-- Acid free
-
-### 14 × 17 in
-
-- Strathmore 500 Series Premium Bristol
-- Plate surface / ultra-smooth
-- 100% cotton
-- Acid free
-- 2-ply
-- Introduced in the Standard collection on August 19, 2026
-- Manufacturer packaging describes the paper as archival quality
-
-### 30 × 40 in
-
-- Strathmore 500 Series Illustration Board
-- Heavyweight vellum surface
-- 20-ply
-- White
-
+
+## Drawing Surfaces
+
+### 9 × 12 in
+
+- Strathmore 300 Series Bristol
+- Smooth surface
+- 100 lb (270 g/m²)
+- Acid free
+
+### 11 × 14 in
+
+- Strathmore 300 Series Bristol
+- Smooth surface
+- 100 lb (270 g/m²)
+- Acid free
+
+### 14 × 17 in
+
+- Strathmore 500 Series Premium Bristol
+- Plate surface / ultra-smooth
+- 100% cotton
+- Acid free
+- 2-ply
+- Introduced in the Standard collection on August 19, 2026
+- Manufacturer packaging describes the paper as archival quality
+
+### 30 × 40 in
+
+- Strathmore 500 Series Illustration Board
+- Heavyweight vellum surface
+- 20-ply
+- White
+
 The creator confirms that the fifteen June 18–30, 2026 `Rec01`–`Rec15`
 indexed video files use this Illustration Board support. Their paths and active
 metadata encode `IllustrationBoard`; the correction preserves all media bytes,
@@ -181,44 +181,44 @@ stable record IDs, Xet identities, sizes, and technical fields.
 Other support sizes and materials may appear when identified in the canonical
 filename and metadata. Future 30 × 40 in records must preserve any documented
 exception rather than assuming that dimensions alone establish support.
-
-## Drawing Instruments and Ink
-
-### Ballpoint
-
-- Pelikan 337 Giant Ballpoint Refill
-- Black and Blue
-- Medium, 1.0 mm
-- Document-proof ink conforming to ISO 12757-2
-
-Documented acquisition exception: `2026-08-23.1932.BallpointPen.Ink.Paper.14x17.Rec03.mp4`
-uses the standard Pelikan black refill until approximately `00:04:59`. Visible
-refill handling marks the transition to an unmarked, unknown-brand black refill
-for the remainder of the recording; the brand is not inferred.
-
-### Fountain pen
-
-- Pilot Custom 823
-- 14-karat gold nibs used in Fine, Medium, and Broad sizes
-- Aurora Black fountain pen ink
-
-The nib size used in an individual recording is not consistently documented and
-must not be inferred from line appearance alone.
-
-Additional tools and media are recorded at the individual-record level.
-
-## Audio
-
-Audio presence is a stored-file property, not a required part of the acquisition
-protocol. `has_audio` records whether an audio stream exists. It does not
-describe the stream's contents or establish redistribution rights for music,
-speech, notifications, or other incidental sound.
-
-## Exceptions and Evidence
-
-Known departures from the protocol should be documented in the affected
-metadata row. A deviation claim should identify its evidence in `notes` and,
-where applicable, provenance fields.
-
-When a property is not documented, it must remain unknown rather than being
-reconstructed from visual appearance alone.
+
+## Drawing Instruments and Ink
+
+### Ballpoint
+
+- Pelikan 337 Giant Ballpoint Refill
+- Black and Blue
+- Medium, 1.0 mm
+- Document-proof ink conforming to ISO 12757-2
+
+Documented acquisition exception: `2026-08-23.1932.BallpointPen.Ink.Paper.14x17.Rec03.mp4`
+uses the standard Pelikan black refill until approximately `00:04:59`. Visible
+refill handling marks the transition to an unmarked, unknown-brand black refill
+for the remainder of the recording; the brand is not inferred.
+
+### Fountain pen
+
+- Pilot Custom 823
+- 14-karat gold nibs used in Fine, Medium, and Broad sizes
+- Aurora Black fountain pen ink
+
+The nib size used in an individual recording is not consistently documented and
+must not be inferred from line appearance alone.
+
+Additional tools and media are recorded at the individual-record level.
+
+## Audio
+
+Audio presence is a stored-file property, not a required part of the acquisition
+protocol. `has_audio` records whether an audio stream exists. It does not
+describe the stream's contents or establish redistribution rights for music,
+speech, notifications, or other incidental sound.
+
+## Exceptions and Evidence
+
+Known departures from the protocol should be documented in the affected
+metadata row. A deviation claim should identify its evidence in `notes` and,
+where applicable, provenance fields.
+
+When a property is not documented, it must remain unknown rather than being
+reconstructed from visual appearance alone.

docs/README.md

@@ -0,0 +1,15 @@
+# Supporting documentation
+
+- [Archive specifications](Archive_Specifications.md): acquisition scope, formats,
+  known gaps and evidence limits.
+- [Validation report](VALIDATION.md): release and ingest checks with retained
+  historical receipts.
+- [Viewer migration](VIEWER_MIGRATION.md): hosted Dataset Viewer configuration history.
+
+The [canonical schema](../SCHEMA.md), [active index](../metadata.csv),
+[checksums](../SHA256SUMS) and [changelog](../CHANGELOG.md) remain at the repository
+root. [Release manifests](../releases/README.md) have their own folder.
+
+These documents moved from the root for v0.7.0. Their original paths remain
+available in earlier immutable revisions. Historical sections describe the paths
+and validation results at those revisions.

VALIDATION.md → docs/VALIDATION.md

@@ -1,5 +1,74 @@
 # Validation Report
 
+## v0.7.0 release-preparation receipt
+
+The validated content is the exact **960-path** tree at
+`521f4ee62ee3843cf36394499c10bf33f07dcaae`. Relative to the peeled v0.6.0 commit
+`4fa4c34ed87ecc35747668abcdd58c91650349d0`, the raw tree delta is 137 added, 12 modified,
+and 12 removed paths. Twelve added/removed media pairs are documented
+identity-preserving renames; the net addition is 74 recordings and 51 small files.
+All previous video payload bytes and record IDs are preserved. Exactly 24
+existing metadata rows change: 12 documented path/time corrections and 12
+commit-history provenance backfills. Pre-Standard metadata is byte-identical.
+
+| Check | Verified result at the content revision |
+| --- | --- |
+| Standard / Pre-Standard / active rows | 703 / 128 / 831 |
+| Active video bytes / encoded playback | 2,176,788,154,698 / 219,966.955344 seconds |
+| Earlier / prospective Standard protocol rows | 364 / 339 |
+| Fragment packets / canonical fragments / complete groups | 12 / 339 / 33 |
+| Work registry / linked records / unlinked indexed records | 37 / 360 / 471 |
+| Revision-pinned work-record joins | 360 verified across 10 source revisions |
+| Work-identity evidence | 23 checksum-pinned confirmation files and 27 revision-pinned evidence files |
+| Recording Timing v1 | 186 fragments / 25 groups; historical packet unchanged |
+| Recording Timing v2 | 339 observations / 33 works; 163 filename starts / 176 unknown starts |
+| Timing v2 creation tags | 339 format tags; 316 retained video tags, all matching |
+| Timing v2 evidence | 13 exact local audit receipts; 16 pinned repository input files; all media identities matched |
+| Physical-reference relationships | 309; checked against their declared source revision |
+| Published payloads / SHA256SUMS coverage | 836 MP4 + 1 ZIP / 837 of 837 |
+| Payload inventory bytes | 2,193,547,379,973 |
+| Repository tests | 86 of 86 passed, including 12 new timing-observation tests |
+| Prior v0.6.0 critical-file receipts | 71 of 71 matched its immutable snapshot |
+
+Ordinary SHA-256 and byte-size bindings were checked against the remote LFS
+inventory, with fresh revision-bound Xet/ETag/size HEAD checks for all MP4s.
+Release preparation does not download, decode, or rehash the full media corpus;
+the original ingest receipts retain their local source and decode evidence.
+Dataset Viewer row and aggregate checks are recorded separately at the exact
+validated content revision in the release manifest. The Viewer is a derived
+current-main cache, not an immutable-tag fixity service.
+
+The release draft adds Recording Timing v2 as five packet files and two tool/test
+files, alongside the release documents. Supporting documents are grouped in
+`docs/` and all six release manifests in `releases/`; the root shrinks from 22
+entries to 15. Two folder indexes provide navigation, active Markdown links are
+updated, and the semantic consistency test reads the relocated specification.
+All five prior manifest files retain their exact bytes. Old release tags and
+revision-pinned URLs retain their original paths; current-main root URLs for
+the moved documents and manifests change to the listed folder paths.
+
+The revised manifest lists all **132** non-MP4/non-ZIP files at the final
+content/documentation commit with exact byte sizes and SHA-256 values. That
+commit excludes the draft's earlier manifest; the regenerated
+`releases/RELEASE_MANIFEST_V0.7.0.json` is then added alone. The final release tree
+must contain **970** paths and differ from the declared critical-files revision
+only by that manifest. Post-merge/tag receipts bind the actual published revisions.
+
+The timing table is derived from the literal retained audit fields. Every one of
+the 339 observations joins by existing record ID, ordinary SHA-256 and size;
+canonical metadata, sidecars, checksum entries and revision-bound remote Xet
+identities agree. All seven older audit hashes still match the v1 source manifest.
+Twelve September 1 path corrections resolve through stable IDs and fixity.
+The strict timing validation checks all 16 original input-file receipts and
+recomputes the table. Default future validation keeps this cohort frozen and
+reports input-file receipts separately, permitting unrelated later index additions.
+No video is re-read for this projection and no exact capture-stop claim is made.
+
+The release preparation preserves every media object, active index, checksum
+entry, work assignment, confirmation, historical sidecar, canonical schema,
+previous release manifest, and existing tag. The DOI `10.57967/hf/10449` remains attached
+to the historical 709-record v0.5.1 snapshot. Website publication is separate.
+
 ## August 20 Rec02 ingest, reviewed September 19
 
 One owner-confirmed historical Rec02 is added under its exact filename and
@@ -19,8 +88,8 @@ preserved. Only the existing work's pending-ingest note is resolved.
 
 The canonical CSV remains sorted by filename, with every prior row value preserved. The timing validator checks this later-ingested record by its ID, path, ordinary SHA-256, Xet identity, byte size, and protocol before excluding it from reconstruction of the original 549-row timing snapshot. That snapshot still matches its original byte size and SHA-256; the historical timing packet and its receipts are unchanged. All 22 timing regression tests pass, including rejection of identity/hash drift and unregistered historical backfills. All 74 repository regression tests pass, with the historical RecNN count updated from 19 to 20.
 
-See the [ingest evidence and limits](Standard_Time_Lapses/Provenance/Ingests/2026-09-19-rec02/README.md) and
-[validation receipt](Standard_Time_Lapses/Provenance/Ingests/2026-09-19-rec02/ingest_validation.json). Release tags and the
+See the [ingest evidence and limits](../Standard_Time_Lapses/Provenance/Ingests/2026-09-19-rec02/README.md) and
+[validation receipt](../Standard_Time_Lapses/Provenance/Ingests/2026-09-19-rec02/ingest_validation.json). Release tags and the
 website mirror are unchanged.
 
 ## Unreleased 2026-09-18 two-drawing ingest candidate
@@ -72,7 +141,7 @@ asserted.
 
 The exact record-ID, old/new path, old/new finish timestamp, and unchanged
 identity mapping is in
-[`finish_time_correction.csv`](Standard_Time_Lapses/Provenance/Corrections/2026-09-01.1413-finish-time/finish_time_correction.csv).
+[`finish_time_correction.csv`](../Standard_Time_Lapses/Provenance/Corrections/2026-09-01.1413-finish-time/finish_time_correction.csv).
 The 12 media objects are renamed server-side; the corpus is not downloaded or
 re-uploaded.
 

releases/README.md

@@ -0,0 +1,20 @@
+# Release receipts
+
+Versioned manifests bind the files at their declared immutable revisions.
+The current release receipt is [v0.7.0](RELEASE_MANIFEST_V0.7.0.json).
+
+| Receipt | Scope |
+| --- | --- |
+| [v0.7.0](RELEASE_MANIFEST_V0.7.0.json) | 831 indexed recordings, confirmed work identity and observed recording times. |
+| [v0.6.0](RELEASE_MANIFEST_V0.6.0.json) | Historical release; exact original manifest bytes retained. |
+| [v0.5.1](RELEASE_MANIFEST_V0.5.1.json) | Historical 709-record snapshot identified by DOI `10.57967/hf/10449`. |
+| [v0.5.0](RELEASE_MANIFEST_V0.5.0.json) | Historical release; exact original manifest bytes retained. |
+| [v0.4.0](RELEASE_MANIFEST_V0.4.0.json) | Historical release; exact original manifest bytes retained. |
+| [Original unversioned receipt](RELEASE_MANIFEST.json) | Legacy receipt preserved under its original filename. |
+
+The five earlier manifests moved here without changing their contents.
+Paths inside them refer to their declared historical repository revisions,
+not to this folder. Existing release tags retain their original trees and root
+manifest locations. The v0.7.0 manifest records the reorganized current tree.
+
+See the [validation report](../docs/VALIDATION.md) and [changelog](../CHANGELOG.md).

releases/RELEASE_MANIFEST_V0.7.0.json

@@ -0,0 +1,1008 @@
+{
+  "manifest_schema": "time-lapse-artifacts-release-manifest/v1",
+  "release_version": "v0.7.0",
+  "release_status": "final",
+  "release_tag": "v0.7.0",
+  "dataset_id": "maxwellinked/time-lapse-artifacts",
+  "created_date": "2026-09-19",
+  "validated_content_revision": "521f4ee62ee3843cf36394499c10bf33f07dcaae",
+  "critical_files_revision": "0e21e3ab804882b3980443729101aef1a984ed51",
+  "prior_release": {
+    "tag": "v0.6.0",
+    "commit": "4fa4c34ed87ecc35747668abcdd58c91650349d0",
+    "annotated_tag_object": "b202e3e2e115cc2d7e5e15d345c73b2344e087c3"
+  },
+  "revision_roles": {
+    "validated_content_revision": "Pinned main baseline for media, canonical metadata, work identities and the new timing observation joins.",
+    "critical_files_revision": "Final reorganized documentation, timing packet and validator/test bytes; the release manifest is added alone under releases/ afterward.",
+    "final_tag": "The tag must resolve to a tree differing from critical_files_revision only by addition of releases/RELEASE_MANIFEST_V0.7.0.json."
+  },
+  "release_delta_from_prior_release": {
+    "active_rows_added": 74,
+    "active_rows_removed": 0,
+    "canonical_standard_rows_added": 74,
+    "active_video_bytes_added": 68125363425,
+    "encoded_playback_seconds_added": "9830.501363",
+    "existing_active_index_rows_modified": 24,
+    "finish_time_correction_rows": 12,
+    "repository_provenance_backfill_rows": 12,
+    "existing_record_ids_preserved": true,
+    "existing_media_bytes_preserved": true,
+    "existing_media_paths_renamed": 12,
+    "identity_preserving_renames": [
+      {
+        "record_id": "tla-bed24891b6405ece",
+        "old_path": "Standard_Time_Lapses/2026-09-01.0213.BallpointPen.Ink.Paper.9x12.Rec01.mp4",
+        "new_path": "Standard_Time_Lapses/2026-09-01.1413.BallpointPen.Ink.Paper.9x12.Rec01.mp4",
+        "sha256": "d8e6df65eda81e16240d883ab6eb6f731a3d9b7fd6546959efdd6b1b43818393"
+      },
+      {
+        "record_id": "tla-20bdc620313bd618",
+        "old_path": "Standard_Time_Lapses/2026-09-01.0213.BallpointPen.Ink.Paper.9x12.Rec02.mp4",
+        "new_path": "Standard_Time_Lapses/2026-09-01.1413.BallpointPen.Ink.Paper.9x12.Rec02.mp4",
+        "sha256": "26a535d47e54b828826023083374acfee2abd862da864b8c0ce4309cfaa84443"
+      },
+      {
+        "record_id": "tla-00cf93bdb9a0abbc",
+        "old_path": "Standard_Time_Lapses/2026-09-01.0213.BallpointPen.Ink.Paper.9x12.Rec03.mp4",
+        "new_path": "Standard_Time_Lapses/2026-09-01.1413.BallpointPen.Ink.Paper.9x12.Rec03.mp4",
+        "sha256": "5b9a86a764216cbdd115b620d45a1d356b5797154df4021916bbccedbe8dbdad"
+      },
+      {
+        "record_id": "tla-11747a288c538e27",
+        "old_path": "Standard_Time_Lapses/2026-09-01.0213.BallpointPen.Ink.Paper.9x12.Rec04.mp4",
+        "new_path": "Standard_Time_Lapses/2026-09-01.1413.BallpointPen.Ink.Paper.9x12.Rec04.mp4",
+        "sha256": "34651d7caff475bc0870a2f63817af96bad3b4afa4add1cf53766414804ef93d"
+      },
+      {
+        "record_id": "tla-f26a33cb42e6a4f0",
+        "old_path": "Standard_Time_Lapses/2026-09-01.0213.BallpointPen.Ink.Paper.9x12.Rec05.mp4",
+        "new_path": "Standard_Time_Lapses/2026-09-01.1413.BallpointPen.Ink.Paper.9x12.Rec05.mp4",
+        "sha256": "67aa7a04a1f983a5e251a554702efac9e90670eb27850e32d24e7661150635f8"
+      },
+      {
+        "record_id": "tla-f4d8d1ab6ac76973",
+        "old_path": "Standard_Time_Lapses/2026-09-01.0213.BallpointPen.Ink.Paper.9x12.Rec06.mp4",
+        "new_path": "Standard_Time_Lapses/2026-09-01.1413.BallpointPen.Ink.Paper.9x12.Rec06.mp4",
+        "sha256": "8a011dacab8a873b1091ad3b06bf4114c29d8c8a6180070c17e3a79fa4cb6042"
+      },
+      {
+        "record_id": "tla-f92022de10e0e792",
+        "old_path": "Standard_Time_Lapses/2026-09-01.0213.BallpointPen.Ink.Paper.9x12.Rec07.mp4",
+        "new_path": "Standard_Time_Lapses/2026-09-01.1413.BallpointPen.Ink.Paper.9x12.Rec07.mp4",
+        "sha256": "d560e979a380d3985edb6d175c43ce7d4b6f5e5704b599228cd8f4eb719adb3b"
+      },
+      {
+        "record_id": "tla-5e5239cecc8b4326",
+        "old_path": "Standard_Time_Lapses/2026-09-01.0213.BallpointPen.Ink.Paper.9x12.Rec08.mp4",
+        "new_path": "Standard_Time_Lapses/2026-09-01.1413.BallpointPen.Ink.Paper.9x12.Rec08.mp4",
+        "sha256": "9807ccce565f261837aaa032ccb995586667f86e82f92dfc6054374a8d699108"
+      },
+      {
+        "record_id": "tla-0b32e0e8155453e2",
+        "old_path": "Standard_Time_Lapses/2026-09-01.0213.BallpointPen.Ink.Paper.9x12.Rec09.mp4",
+        "new_path": "Standard_Time_Lapses/2026-09-01.1413.BallpointPen.Ink.Paper.9x12.Rec09.mp4",
+        "sha256": "9a04bea9be1f8d156f69a186214b48946b6639ad6351cff07bc9ac719c3268aa"
+      },
+      {
+        "record_id": "tla-ea32a9a1da6befb7",
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+      "sha256": "5ae205adbe67c24b5fd3ebb0aea30b37771c1154f0ffeb2795d7b6fe9bd4bcf6"
+    },
+    {
+      "path": "tools/test_physical_references.py",
+      "size_bytes": 15832,
+      "sha256": "df8edd636b00520d4c29f3cf90380216a980cae26e94f647216424b10b8f24d4"
+    },
+    {
+      "path": "tools/test_recording_timing.py",
+      "size_bytes": 25519,
+      "sha256": "66d99ebfff387faa6fc07244ab67d65ffbd3d32e3fa13c4cb158a939b826e80b"
+    },
+    {
+      "path": "tools/test_recording_timing_v2.py",
+      "size_bytes": 4559,
+      "sha256": "d8b310148654a1ce8f4da1de55e8cd502aded35dd21b91ac889aea9dfdb43bd3"
+    },
+    {
+      "path": "tools/test_semantic_consistency.py",
+      "size_bytes": 13691,
+      "sha256": "ae53462aba399abd7b68d760b3dce903b927e62537fa53b580d194d4edcf6587"
+    },
+    {
+      "path": "tools/test_sha256sums.py",
+      "size_bytes": 4041,
+      "sha256": "1897a3a66ffd92253905d88a2cf6c2409b2eb68eac4755537937b1e82294fc19"
+    },
+    {
+      "path": "tools/validate_fragment_relationships.py",
+      "size_bytes": 15307,
+      "sha256": "a6710f3eb3ef2893333c3d794e092d44cb15ea514c1a9827027274de7b384b79"
+    },
+    {
+      "path": "tools/validate_metadata.py",
+      "size_bytes": 31295,
+      "sha256": "2c21922e9f2614ce73c9b69e4fd4216582470633bcd3834d02ae624afe7eea2b"
+    },
+    {
+      "path": "tools/validate_physical_references.py",
+      "size_bytes": 20527,
+      "sha256": "0254c7b4047a512c4a2b3a44a1f7f01e68ca04b661b67b3894ef3cd74f9eb652"
+    },
+    {
+      "path": "tools/validate_recording_timing.py",
+      "size_bytes": 78700,
+      "sha256": "9ba4f28cfd79123b0d895ff3b7f0646863f9e4cb9478d9bb0b9ff232788ad0dc"
+    },
+    {
+      "path": "tools/validate_recording_timing_v2.py",
+      "size_bytes": 11584,
+      "sha256": "7cda0369e9906237e74c221a1887347e1060fee91b13f34e838a4c837ef97005"
+    },
+    {
+      "path": "tools/validate_sha256sums.py",
+      "size_bytes": 6248,
+      "sha256": "e46dca54154fad66fc1aae9e4c7fa88d5c002ddbcbb024c21bbe2b9e0f5ee1f3"
+    }
+  ],
+  "recording_timing_v2": {
+    "recordings": 339,
+    "work_ids": 33,
+    "filename_starts": 163,
+    "unknown_starts": 176,
+    "format_creation_tags": 339,
+    "video_creation_tags": 316,
+    "creation_tag_matches": 316,
+    "creation_tag_mismatches": 0,
+    "clock_conflicts": 0,
+    "source_revision": "521f4ee62ee3843cf36394499c10bf33f07dcaae",
+    "source_audit_receipts": 13,
+    "pinned_source_file_receipts": 16,
+    "table_path": "Standard_Time_Lapses/Provenance/Recording_Timing_v2/recording_timing.csv",
+    "evidence": "Literal format/video creation tags and filename starts interpreted in America/New_York; no modeled starts and no exact capture-stop claim.",
+    "historical_timing_v1_unchanged": true
+  }
+}

tools/test_recording_timing_v2.py

@@ -0,0 +1,95 @@
+import copy
+import json
+import shutil
+import tempfile
+import unittest
+from pathlib import Path
+
+from validate_recording_timing_v2 import PREFIX, build_rows, filename_start, timing_values, validate
+
+ROOT = Path(__file__).resolve().parents[1]
+
+
+class TimingObservationTests(unittest.TestCase):
+    def observation(self, name='VID_20260917_211605.mp4', fmt='2026-09-18T01:23:18.000000Z', video=''):
+        return dict(source_filename=name, format_creation_time_raw=fmt, video_creation_time_raw=video)
+
+    def test_start_uses_explicit_timezone(self):
+        row = timing_values(self.observation())
+        self.assertEqual(row['filename_start_local'], '2026-09-17T21:16:05-04:00')
+        self.assertEqual(row['filename_start_utc'], '2026-09-18T01:16:05Z')
+        self.assertEqual(row['filename_to_creation_seconds'], '433')
+
+    def test_shared_finish_name_is_not_a_start(self):
+        row = timing_values(self.observation('2026-09-18.0244.BallpointPen.Ink.Paper.9x12.Rec01.mp4'))
+        self.assertEqual(row['filename_start_utc'], '')
+        self.assertEqual(row['filename_to_creation_seconds'], '')
+        self.assertEqual(row['timing_status'], 'creation_only')
+
+    def test_missing_video_tag_is_not_inferred(self):
+        row = timing_values(self.observation())
+        self.assertEqual(row['video_creation_time_utc'], '')
+        self.assertEqual(row['creation_tag_agreement'], 'not_observed')
+
+    def test_tag_conflict_is_retained(self):
+        row = timing_values(self.observation(video='2026-09-18T01:23:19Z'))
+        self.assertEqual(row['creation_tag_agreement'], 'mismatch')
+        self.assertEqual(row['timing_status'], 'clock_conflict')
+
+    def test_negative_interval_is_not_clamped(self):
+        row = timing_values(self.observation(fmt='2026-09-18T01:16:04Z'))
+        self.assertEqual(row['filename_to_creation_seconds'], '-1')
+        self.assertEqual(row['timing_status'], 'clock_conflict')
+
+    def test_naive_embedded_time_is_rejected(self):
+        with self.assertRaisesRegex(ValueError, 'timezone'):
+            timing_values(self.observation(fmt='2026-09-18T01:23:18'))
+
+    def test_dst_ambiguous_and_missing_times_are_rejected(self):
+        for name in ['VID_20261101_013000.mp4', 'VID_20260308_023000.mp4']:
+            with self.subTest(name=name), self.assertRaises(ValueError):
+                filename_start(name, 'America/New_York')
+
+    def test_private_source_path_is_rejected(self):
+        with self.assertRaisesRegex(ValueError, 'basename'):
+            filename_start('C:\\private\\VID_20260917_211605.mp4', 'America/New_York')
+
+    def test_published_packet(self):
+        result = validate(ROOT)
+        self.assertEqual(result['counts']['recordings'], 339)
+        self.assertEqual(result['counts']['unknown_starts'], 176)
+
+    def test_identity_mismatch_is_rejected(self):
+        packet = json.loads((ROOT / PREFIX / 'observations.json').read_text(encoding='utf-8'))
+        obs = copy.deepcopy(packet['observations'])
+        obs[0]['source_sha256'] = '0' * 64
+        with self.assertRaisesRegex(ValueError, 'SHA-256'):
+            build_rows(obs, ROOT, 'unused')
+
+    def test_missing_observation_is_rejected(self):
+        packet = json.loads((ROOT / PREFIX / 'observations.json').read_text(encoding='utf-8'))
+        with self.assertRaisesRegex(ValueError, 'coverage'):
+            build_rows(packet['observations'][:-1], ROOT, 'unused')
+
+    def test_later_unrelated_append_does_not_expand_frozen_scope(self):
+        with tempfile.TemporaryDirectory() as temp:
+            target = Path(temp)
+            shutil.copytree(ROOT / PREFIX, target / PREFIX)
+            manifest = json.loads((target / PREFIX / 'MANIFEST.json').read_text(encoding='utf-8'))
+            for receipt in manifest['source_files']:
+                p = target / receipt['path']
+                p.parent.mkdir(parents=True, exist_ok=True)
+                shutil.copyfile(ROOT / receipt['path'], p)
+            metadata = target / 'metadata.csv'
+            text = metadata.read_text(encoding='utf-8')
+            first = text.splitlines()[1].replace('tla-3f49a8917fe22676', 'tla-0000000000000000')
+            metadata.write_text(text + first + '\n', encoding='utf-8')
+            result = validate(target)
+            self.assertEqual(result['counts']['recordings'], 339)
+            self.assertEqual(result['matching_source_file_receipts'], 15)
+            with self.assertRaisesRegex(ValueError, 'Size mismatch|Checksum mismatch'):
+                validate(target, target)
+
+
+if __name__ == '__main__':
+    unittest.main()

tools/test_semantic_consistency.py

@@ -289,7 +289,7 @@ class SemanticConsistencyTests(unittest.TestCase):
         specifications = re.sub(
             r"\s+",
             " ",
-            (ROOT / "Archive_Specifications.md").read_text(encoding="utf-8"),
+            (ROOT / "docs" / "Archive_Specifications.md").read_text(encoding="utf-8"),
         )
         capture_protocol = re.sub(
             r"\s+",

tools/validate_recording_timing_v2.py

@@ -0,0 +1,225 @@
+#!/usr/bin/env python3
+"""Validate the frozen observation-only timing packet against its pinned inputs."""
+import argparse
+import csv
+import hashlib
+import io
+import json
+import re
+from collections import Counter
+from datetime import datetime, timezone
+from decimal import Decimal
+from pathlib import Path
+from zoneinfo import ZoneInfo
+
+PREFIX = 'Standard_Time_Lapses/Provenance/Recording_Timing_v2'
+FIELDS = [
+    'record_id', 'work_id', 'file_path', 'source_hub_revision',
+    'relationship_path', 'relationship_source_revision', 'sequence_position',
+    'sequence_count', 'sha256', 'size_bytes', 'hub_xet_hash', 'source_audit_id',
+    'source_filename', 'filename_start_local', 'filename_start_utc',
+    'filename_start_basis', 'format_creation_time_utc', 'video_creation_time_utc',
+    'creation_tag_agreement', 'filename_to_creation_seconds', 'timing_status',
+]
+UTC = timezone.utc
+
+
+def require(condition, message):
+    if not condition:
+        raise ValueError(message)
+
+
+def csv_rows(path):
+    return list(csv.DictReader(Path(path).read_text(encoding='utf-8-sig').splitlines()))
+
+
+def iso(value):
+    return value.isoformat().replace('+00:00', 'Z')
+
+
+def utc_tag(raw):
+    if not raw:
+        return None
+    result = datetime.fromisoformat(raw)
+    require(result.tzinfo is not None, 'Embedded timestamp lacks a timezone')
+    require(result.utcoffset().total_seconds() == 0, 'Expected literal UTC creation tag')
+    return result.astimezone(UTC)
+
+
+def filename_start(name, zone_name):
+    require(not any(c in name for c in '/\\:'), 'Source filename must be a basename')
+    match = re.fullmatch(r'VID_(\d{8})_(\d{6})\.mp4', name)
+    if not match:
+        return None
+    naive = datetime.strptime(''.join(match.groups()), '%Y%m%d%H%M%S')
+    zone = ZoneInfo(zone_name)
+    early, late = naive.replace(tzinfo=zone, fold=0), naive.replace(tzinfo=zone, fold=1)
+    require(early.utcoffset() == late.utcoffset(), 'Ambiguous or nonexistent local filename time')
+    require(early.astimezone(UTC).astimezone(zone).replace(tzinfo=None) == naive,
+            'Nonexistent local filename time')
+    return early
+
+
+def seconds(delta):
+    value = Decimal(delta.days * 86400 + delta.seconds) + Decimal(delta.microseconds) / 1000000
+    return format(value, 'f')
+
+
+def timing_values(observation, zone_name='America/New_York'):
+    start = filename_start(observation['source_filename'], zone_name)
+    boundary = utc_tag(observation['format_creation_time_raw'])
+    video = utc_tag(observation['video_creation_time_raw'])
+    require(boundary is not None, 'Format creation tag is required for this packet')
+    interval = seconds(boundary - start.astimezone(UTC)) if start else ''
+    agreement = 'not_observed' if video is None else ('match' if video == boundary else 'mismatch')
+    conflict = agreement == 'mismatch' or (interval != '' and Decimal(interval) < 0)
+    return dict(
+        filename_start_local=start.isoformat() if start else '',
+        filename_start_utc=iso(start.astimezone(UTC)) if start else '',
+        filename_start_basis='device_filename_interpreted_in_declared_timezone' if start else 'unknown',
+        format_creation_time_utc=iso(boundary),
+        video_creation_time_utc=iso(video) if video else '',
+        creation_tag_agreement=agreement,
+        filename_to_creation_seconds=interval,
+        timing_status='clock_conflict' if conflict else ('filename_start_and_creation_observed' if start else 'creation_only'),
+    )
+
+
+def build_rows(observations, source_root, revision, zone_name='America/New_York', expected_ids=None):
+    source_root = Path(source_root)
+    metadata_rows = csv_rows(source_root / 'metadata.csv')
+    metadata = {r['record_id']: r for r in metadata_rows}
+    require(len(metadata) == len(metadata_rows), 'Duplicate metadata record IDs')
+    links = {}
+    for r in csv_rows(source_root / 'Work_Identity/work_record_links.csv'):
+        require(r['record_id'] not in links, 'Duplicate work membership')
+        require(r['owner_confirmation_state'] == 'owner_confirmed', 'Unconfirmed work membership')
+        links[r['record_id']] = r
+    works = {r['work_id'] for r in csv_rows(source_root / 'Work_Identity/works.csv')}
+    relationships = {}
+    for p in sorted((source_root / 'Standard_Time_Lapses/Provenance').glob('*/fragment_sequence_relationships.csv')):
+        for r in csv_rows(p):
+            if r['object_role'] != 'canonical_fragment':
+                continue
+            require(r['record_id'] not in relationships, 'Duplicate fragment relationship')
+            relationships[r['record_id']] = (p.relative_to(source_root).as_posix(), r)
+    checksums = {}
+    for line in (source_root / 'SHA256SUMS').read_text(encoding='utf-8').splitlines():
+        digest, name = line.split(maxsplit=1)
+        checksums[name.lstrip('*')] = digest
+    result = []
+    seen = set()
+    for o in observations:
+        rid = o['record_id']
+        require(rid not in seen, 'Duplicate observation ID')
+        seen.add(rid)
+        m, link = metadata[rid], links[rid]
+        path, s = relationships[rid]
+        require(m['acquisition_protocol_version'] == 'standard-2026-08-27', 'Outside prospective cohort')
+        require(link['work_id'] in works, 'Unknown work ID')
+        require(o['source_sha256'] == s['sha256'] == checksums[m['file_name']], 'SHA-256 identity mismatch')
+        require(int(o['source_size_bytes']) == int(m['size_bytes']) == int(s['size_bytes']), 'Byte-size identity mismatch')
+        require(m['hub_xet_hash'] == s['hub_xet_hash'], 'Xet identity mismatch')
+        require(s['sequence_completeness'] == 'owner_confirmed_complete', 'Unexpected sequence status')
+        row = dict(record_id=rid, work_id=link['work_id'], file_path=m['file_name'],
+                   source_hub_revision=revision, relationship_path=path,
+                   relationship_source_revision=s['source_hub_revision'],
+                   sequence_position=s['sequence_position'], sequence_count=s['sequence_count'],
+                   sha256=o['source_sha256'], size_bytes=str(o['source_size_bytes']),
+                   hub_xet_hash=m['hub_xet_hash'], source_audit_id=o['source_audit_id'],
+                   source_filename=o['source_filename'])
+        row.update(timing_values(o, zone_name))
+        result.append(row)
+    expected = set(expected_ids) if expected_ids is not None else {r['record_id'] for r in metadata_rows if r['acquisition_protocol_version'] == 'standard-2026-08-27'}
+    require(seen == expected, 'Prospective cohort coverage mismatch')
+    groups = {}
+    for row in result:
+        groups.setdefault(row['work_id'], []).append(row)
+    for group in groups.values():
+        require({int(r['sequence_count']) for r in group} == {len(group)}, 'Group count mismatch')
+        require(sorted(int(r['sequence_position']) for r in group) == list(range(1, len(group) + 1)),
+                'Group sequence is incomplete or duplicated')
+    return sorted(result, key=lambda r: r['file_path'])
+
+
+def encode_rows(rows):
+    out = io.StringIO(newline='')
+    writer = csv.DictWriter(out, fieldnames=FIELDS, lineterminator='\n')
+    writer.writeheader()
+    writer.writerows(rows)
+    return out.getvalue().encode('utf-8')
+
+
+def summary(rows):
+    return dict(recordings=len(rows), work_ids=len({r['work_id'] for r in rows}),
+                filename_starts=sum(bool(r['filename_start_utc']) for r in rows),
+                unknown_starts=sum(not r['filename_start_utc'] for r in rows),
+                format_creation_tags=sum(bool(r['format_creation_time_utc']) for r in rows),
+                video_creation_tags=sum(bool(r['video_creation_time_utc']) for r in rows),
+                creation_tag_matches=sum(r['creation_tag_agreement'] == 'match' for r in rows),
+                creation_tag_mismatches=sum(r['creation_tag_agreement'] == 'mismatch' for r in rows),
+                clock_conflicts=sum(r['timing_status'] == 'clock_conflict' for r in rows))
+
+
+def check_receipt(root, receipt):
+    p = Path(receipt['path'])
+    require(not p.is_absolute() and '..' not in p.parts, 'Unsafe receipt path')
+    data = (Path(root) / p).read_bytes()
+    require(len(data) == receipt['size_bytes'], f'Size mismatch: {p}')
+    require(hashlib.sha256(data).hexdigest() == receipt['sha256'], f'Checksum mismatch: {p}')
+
+
+def validate(root, source_root=None):
+    root = Path(root)
+    strict_source = source_root is not None
+    source_root = Path(source_root or root)
+    packet = root / PREFIX
+    manifest = json.loads((packet / 'MANIFEST.json').read_text(encoding='utf-8'))
+    require(manifest['schema'] == 'recording-timing-observations/v2', 'Wrong timing schema')
+    for receipt in manifest['packet_files']:
+        check_receipt(packet, receipt)
+    matching_source_receipts = 0
+    for receipt in manifest['source_files']:
+        try:
+            check_receipt(source_root, receipt)
+            matching_source_receipts += 1
+        except ValueError:
+            if strict_source:
+                raise
+    evidence = json.loads((packet / 'observations.json').read_text(encoding='utf-8'))
+    require(evidence['schema'] == 'recording-timing-source-projection/v1', 'Wrong observation schema')
+    observations = evidence['observations']
+    counts = Counter(o['source_audit_id'] for o in observations)
+    audits = manifest['retained_local_audits']
+    require(len(audits) == len({a['source_audit_id'] for a in audits}), 'Duplicate audit receipt')
+    require(counts == {a['source_audit_id']: a['included_rows'] for a in audits}, 'Audit projection counts mismatch')
+    for audit in audits:
+        require(bool(re.fullmatch(r'[0-9a-f]{64}', audit['sha256'])), 'Invalid source audit digest')
+        require(audit['total_rows'] >= audit['included_rows'] > 0 and audit['size_bytes'] > 0, 'Invalid audit receipt')
+    require(len(manifest['record_ids']) == len(set(manifest['record_ids'])), 'Duplicate frozen cohort ID')
+    expected = build_rows(observations, source_root, manifest['source_hub_revision'], manifest['filename_timezone'], manifest['record_ids'])
+    require((packet / 'recording_timing.csv').read_bytes() == encode_rows(expected), 'Timing table differs from evidence and pinned joins')
+    result = summary(expected)
+    require(result == manifest['counts'], 'Timing coverage counts mismatch')
+    return dict(status='passed', schema=manifest['schema'], source_hub_revision=manifest['source_hub_revision'],
+                counts=result, source_file_receipts=len(manifest['source_files']),
+                matching_source_file_receipts=matching_source_receipts, strict_pinned_source=strict_source,
+                retained_local_audit_receipts=len(audits),
+                verification_scope='Published projection, frozen cohort identity joins and recomputed timing fields. Input file receipts are reported separately; --source-root additionally requires all pinned input bytes. Original local audits and video bytes are not re-read.')
+
+
+def main():
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument('--root', type=Path, default=Path(__file__).resolve().parents[1])
+    parser.add_argument('--source-root', type=Path, help='Require exact pinned source-file receipts from this checkout; otherwise check frozen IDs against current --root inputs')
+    parser.add_argument('--output', type=Path)
+    args = parser.parse_args()
+    result = validate(args.root, args.source_root)
+    text = json.dumps(result, indent=2) + '\n'
+    if args.output:
+        args.output.write_text(text, encoding='utf-8')
+    print(text, end='')
+
+
+if __name__ == '__main__':
+    main()