Transaction Science d14be54e17 wai: live provenance, C2PA 2.4 §19 for room tracks and takes, tied to the JWP receipts ...

The extension live-provenance.md registers wai.live.provenance: the per-segment
C2PA Manifest Box method and the Verifiable Segment Info method, written as C2PA
2.4 §19 defines them for a CMAF track carried under draft-ietf-moq-cmsf-01, where a
segment less its C2PA boxes is its MoQ group's objects, so the segment's hard
binding and the group receipt's Merkle root commit to the same chunks. Session keys
rotate in a segment's manifest and also sign the group receipts.

wai-rs feature live_provenance writes and verifies it with no C2PA library: BMFF,
JUMBF, COSE_Sign1 with EdDSA, the claim signer's X.509 chain, and the receipts
through jwp_delivery. The corpus live-conformance/c2pa-live/ has five good streams
and a negative for each of the thirty reasons.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

2026-10-21 04:25:52 -04:00

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