gilesb 43a9a1cd64 Store full provenance on IPFS with provenance_cid ...

Provenance records are now stored on IPFS before the DB transaction.
The provenance CID is included in both:
- The provenance stored in the asset record
- The ActivityPub activity object

This enables:
- Immutable, content-addressed provenance
- Bitcoin timestamping of provenance for cross-L2 dispute resolution
- Verifiable chain of custody: inputs → recipe → output

Provenance structure on IPFS:
{
  "inputs": [...],
  "output": {"content_hash": "...", "ipfs_cid": "..."},
  "recipe": {...},
  "recipe_cid": "Qm...",
  "provenance_cid": "Qm...",  // self-reference for verification
  ...
}

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

2026-01-09 02:31:03 +00:00

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