Introducing Credentio: Open Source C++ Library for C2PA Content Credentials from Google

Google has introduced Credentio, an open-source C++ library for locally validating Coalition for Content Provenance and Authenticity (C2PA) Content Credentials under specifications 2.2 and 2.4. Already used across nearly 40 conformant Google products handling tens of billions of media assets, the library is designed to verify provenance information for images, video, audio, documents, and other formats without uploading files to external services. Its local-first approach is intended to reduce latency, bandwidth use, and privacy risks, while its small memory footprint supports validation of both small files and multi-gigabyte assets in client, server, and edge environments. Credentio provides configurable support for official or custom trust lists, detailed parsing of manifests, assertions, signatures, and claims, and reports that identify verification results and integrity issues. The project currently focuses on validation but is planned to expand to generating and embedding Content Credentials, and Google has made its repository available for community contributions.

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