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Chimera GFX release export
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# Phase 0.9E-R official Y2JB release correlation
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Date: 2026-07-18
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Result: `OFFICIAL_RELEASE_NO_MATCH`
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Overall classification: `LOCAL_BACKUP_NOT_CORRELATED`
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This was a bounded host-side investigation. Public network access was limited
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to official `Gezine/Y2JB` GitHub repository, API, tag, release, asset metadata,
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and source-archive URLs. No PS5 address, request, connection, transfer,
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payload, target build, restore, or execution was used.
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## Local evidence captured before network access
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| Field | Value |
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|---|---|
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| path | `<local-download>/Y2JB-Autoloader-403-1240.zip` |
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| size | `504159435` |
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| SHA-256 | `805e3f87f0c371223619ffc7d3a7b3c0d41a1fae8a8b1171d9e2f162659e8291` |
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| creation UTC | `2026-06-23T14:10:39.0466596Z` |
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| modification UTC | `2026-06-23T14:11:10.6992328Z` |
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| ZIP comment | empty |
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| first 64 bytes | `504b030414000000000041abca5c000000000000000000000000040000005053352f504b030414000000000041abca5c0000000000000000000000000b000000` |
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| last 64 bytes | `76652e6461740a0020000000000001001800c065678d17f9dc0100000000000000000000000000000000504b050600000000050005000a020000abda0c1e0000` |
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| Zone.Identifier | 327 bytes; SHA-256 `70928a3d66cbb9f584596414c4fe535b498dd5ed7c5f55bbeae4efeb146ea841` |
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| local download indication | `ReferrerUrl` and `HostUrl` are MediaFire; exact volatile signed URL is retained only in the original ADS |
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| browser records | exact filename absent from five bounded Chrome/Edge/Brave/Firefox history candidates |
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The MediaFire marker is local provenance evidence, not evidence about the
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bytes hosted there and not an official-source match.
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### ZIP entries
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The four directory entries use method 0, CRC `00000000`, flag bits 0, and
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zero sizes. Central-directory metadata was captured without normalization:
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| Name | Method | Compressed | Uncompressed | CRC32 | DOS timestamp | Header offset | External attr |
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|---|---:|---:|---:|---|---|---:|---:|
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| `PS5/` | 0 | 0 | 0 | `00000000` | `2026-06-10 21:26:02` | 0 | 16 |
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| `PS5/EXPORT/` | 0 | 0 | 0 | `00000000` | `2026-06-10 21:26:02` | 34 | 16 |
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| `PS5/EXPORT/BACKUP/` | 0 | 0 | 0 | `00000000` | `2026-06-10 21:26:54` | 75 | 16 |
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| `PS5/EXPORT/BACKUP/202606102126_00/` | 0 | 0 | 0 | `00000000` | `2026-06-10 21:27:24` | 123 | 16 |
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| `PS5/EXPORT/BACKUP/202606102126_00/archive.dat` | 8 | 504158629 | 504365056 | `522808c8` | `2026-06-10 21:27:28` | 187 | 32 |
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All five entries use general-purpose flag bits 0. The archive entry reports
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create system 0, create version 63, and extraction version 20.
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The inner first 64 bytes are
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`5349454341460000010000000000000001000000000000000300000000000000c6ff138694ca1d2701779aae67de1525e5158700e6158700e715870000000000`.
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Only the `SIECAF` magic and bounded header were inspected. No new parsing,
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decryption, or reverse engineering was attempted. Its previously established
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SHA-256 remains
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`6439834e8856d45b6d6fe699b74c35ca6985a199ea8ecf3e398c018d37be2d55`.
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## Official inventory
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Metadata came from:
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- `https://api.github.com/repos/Gezine/Y2JB`;
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- `https://api.github.com/repos/Gezine/Y2JB/releases?per_page=100`;
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- `https://api.github.com/repos/Gezine/Y2JB/tags?per_page=100`.
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The official API returned three releases and five tags.
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| Version | Official state | Tag commit | Release publication | Source tree |
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|---|---|---|---|---|
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| 1.2 | changelog text only; no current tag or release | unknown; not guessed | none | no exact release tree |
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| 1.2.1 | tag `Y2JB-1.2.1`; no current release | `6210f98c23552e6eb3c4c8981f72a200bb6121b2` | none | `928ceb979881a063457270dde4961ea4a06bc1fa` |
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| 1.3 | release `Y2JB 1.3 (deprecated)`, tag `1.3` | `82e6bbf1935d5f41c3bd5bd9e6598cf90bb2e022` | `2026-05-25T14:29:41Z` | `df29ffe4d8131b5f8b0da1874e34b95a41f0660d` |
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| 1.4 | tag `1.4`; no current release | `02eda2e772df629ecfe5a46459769bd8c994ef3e` | none | `ec06403b45f7b68e01eb5053f81277dee4910dd2` |
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| 1.5 | release `Y2JB 1.5 (deprecated)`, tag `1.5` | `5fa556e6281229057dace3254b099f95261df386` | `2026-05-22T15:06:30Z` | `db364529c347f34b8ddb186f57bb61dab91113db` |
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| 1.6 | release `Y2JB 1.6`, tag `1.6` | `0dbbf4e7e0203af7e5d101a3256c634edf4e3ba2` | `2026-06-09T14:54:35Z` | `c4344f43af7c268337437e6419548dba6f6bc211` |
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The 1.6 release body contains the historical 1.2 through 1.5 changelogs. That
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does not create missing release objects or identify an exact 1.2 commit.
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## Metadata-first asset comparison
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GitHub supplied SHA-256 digests for every current official asset. Each digest
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and size excludes the local outer ZIP, so no large release asset was
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downloaded.
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| Tag | Asset ID | Official asset | Official size | Size delta vs local | Official SHA-256 | Result |
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|---|---:|---|---:|---:|---|---|
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| 1.6 | 442805805 | `Y2JB_backup_1.6.12.20.zip` | 498991521 | -5167914 | `9c097ed9000792507bcf307eff0802f40ee64dc047ab6de3d38acccc62d39dcc` | `NO_MATCH` |
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| 1.6 | 442358421 | `Y2JB_backup_1.6.4.03.zip` | 504395044 | +235609 | `b01b4f442327f9eca90ffc4506dfa58249e4ac70cb9d7488c856c9e8dfaf37b4` | `NO_MATCH` |
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| 1.6 | 442358388 | `Y2JB_download0_1.6.zip` | 315229037 | -188930398 | `d032954033c17acda47c41179a22fa09016ddd40a274f4e9afbb051e5d08d3bd` | `NO_MATCH` |
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| 1.5 | 429350761 | `Y2JB_backup_1.5.zip` | 503863926 | -295509 | `91bc9fb38e62d2b34d0009dbfd6a46dffb379277eef3915dd0a1956f65462a45` | `NO_MATCH` |
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| 1.5 | 429351154 | `Y2JB_download0_1.5.zip` | 336514975 | -167644460 | `f7e5debb2e4c6b3fe7224e549c4aaf9b273a178543cd0bfe84e37bc0521d590a` | `NO_MATCH` |
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| 1.3 | 429415428 | `Y2JB_backup_1.3.7z` | 488117068 | -16042367 | `e63a6b8fe134ad93b8a6a3b332b98810598aff7dfb6703a226523143c3844dfb` | `NO_MATCH` |
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| 1.3 | 429415862 | `Y2JB_download0_1.3.zip` | 336789664 | -167369771 | `c64ef5bc508e4d81395928a8a54b2832f2b37c9cd1603ec9e7e3bd6f5ad6b526` | `NO_MATCH` |
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Asset creation/update times recorded by GitHub were:
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- 1.6 `12.20`: `2026-06-09T14:52:35Z` / `14:53:10Z`;
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- 1.6 `4.03`: `2026-06-09T03:33:57Z` / `03:34:40Z`;
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- 1.6 `download0`: `2026-06-09T03:33:55Z` / `03:34:30Z`;
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- 1.5 backup: `2026-05-25T12:46:49Z` / `12:47:34Z`;
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- 1.5 `download0`: `2026-05-25T12:47:34Z` / `12:47:56Z`;
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- 1.3 backup: `2026-05-25T14:27:41Z` / `14:28:29Z`;
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- 1.3 `download0`: `2026-05-25T14:28:29Z` / `14:29:18Z`.
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The 1.6 release labels its `4.03` backup for firmware 4.03 through 12.40 and
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its `12.20`-named backup for 12.60 and later. Releases 1.3 and 1.5 are marked
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deprecated. Their release bodies, and the 1.6 historical changelog, were
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retained as descriptive metadata only; they do not establish local identity.
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No asset has the local name, size, or SHA-256. An exact byte match is therefore
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mathematically impossible for the inventoried assets without downloading
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them. Downloading a digest-excluded 315–504 MB object would add no evidence and
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would violate the metadata-first rule.
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## Decision
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- correlation: `OFFICIAL_RELEASE_NO_MATCH`;
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- identified local release: none;
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- local outer-to-release association: none;
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- large backup assets downloaded: zero;
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- local backup classification: `LOCAL_BACKUP_NOT_CORRELATED`;
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- Phase 0.9F offline design allowed: `false`.
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This does not prove that the local package contains no official-derived
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content. It proves that its outer bytes are not any current official
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`Gezine/Y2JB` release asset.
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