OpenAI joins the steering committee of the Coalition for Content Provenance and Authenticity, the cross-industry group that maintains the Content Credentials standard for cryptographically signed metadata on media. Combined with announced plans to embed Content Credentials in Sora and DALL·E output, this is the moment provenance stops being an aspiration in white papers and becomes a default piece of the frontier-model stack. For AI filmmakers and the platforms distributing their work, it's the first concrete answer to "how do we tell where this came from."