C2PA and PNG #542

Coalition for Content Provenance and Authenticity (C2PA) develops technical specifications that can establish content provenance and authenticity at scale.

It is proposed to add an (already deployed) chunk for C2PA, caBX, to the PNG specification.

Useful links:

• INTRODUCTION TO CONTENT CREDENTIALS by LEONARD ROSENTHOL (PDF)
• Presentations from IPTC Photo Metadata Conference 2025