GPAI Ledger › Muse Spark (Meta)
Muse Spark
Public summary of training content · Article 53(1)(d), Regulation (EU) 2024/1689
Provider: Meta — status: Published
Meta publishes a public summary of training content for Muse Spark under the EU AI Act; every version this ledger has captured is archived below with its hash and timestamp proof.
AIAL metadata: summary dated 2026-07-08, model released 2026-04-08, eval page
Version difference observed: the newest live copy and the archived third-party copy of this summary currently differ in content (text similarity 0.99). The rows below serve both — compare the extracted text of the two document versions to see the difference.
Document versions
Rows may capture the same summary from different sources or formats (the provider's site, AIAL's archived copy); sizes and hashes are comparable only within one URL.
| Capture (UTC) | Source of copy | URL | SHA-256 | Bytes | Notes |
|---|---|---|---|---|---|
| 20260817T085600Z | provider site | scontent-mxp2-1.xx.fbcdn.net/m1/v/t0.841…oc=…&ccb=…&oh=…&oe=…&_nc_sid=… | fb8e4a1daaba1538… | 257,787 | Meta CDN-hosted PDF (signed URL) |
| 20260811T111428Z | AIAL archived copy | aial.ie/research/gpai-training-transpare…hive/Muse_Spark_2026_07_21.pdf | 6d0dce769e8b2edd… | 258,200 |
Watch-surface captures
Captures of the page(s) where the document is published (portals, hubs, docs pages) — monitored for change detection; not the document itself.
| Capture (UTC) | Source of copy | URL | SHA-256 | Bytes | Notes |
|---|---|---|---|---|---|
| 20260821T110926Z | provider site | transparency.meta.com/reports/regulatory-transparency-reports/ | d45e518728b3cbf7… | 837,600 | rendered page (captured with a browser); content changed vs the previous capture of this target |
| 20260817T082935Z | provider site | transparency.meta.com/reports/regulatory-transparency-reports/ | 12509e1d776336e2… | 873,685 | rendered page (captured with a browser); content changed vs the previous capture of this target |
| 20260811T105149Z | provider site | transparency.meta.com/reports/regulatory-transparency-reports/ | ccf86bc0fa73ebc5… | 256,793 | page as served without JavaScript — mostly empty shell; later captures store the fully rendered page |
Captures of superseded target URLs
Locations this ledger previously tracked for this source (per-row notes give the reason each was superseded) — kept as faithful records of what those URLs served at capture time.
| Capture (UTC) | Source of copy | URL | SHA-256 | Bytes | Notes |
|---|---|---|---|---|---|
| 20260820T110728Z | provider site | scontent-mxp1-1.xx.fbcdn.net/m1/v/t0.841…oc=…&ccb=…&oh=…&oe=…&_nc_sid=… | fb8e4a1daaba1538… | 257,787 | Meta CDN-hosted PDF (signed URL); bytes identical to 20260817T085600Z; duplicate target identity minted 20 Aug 2026 when Meta's CDN shard hostname rotated; bytes identical to the canonical target, which now tracks the content-addressed path only |
Last checked: 2026-08-21 (re-checked on the daily schedule — see Methodology). Seen a summary we missed? See the contact details.