OpenAI Joins C2PA, Adds SynthID Watermarks, Launches Public Image Verification Tool

Summary

OpenAI announced on May 19, 2026 that it has become a C2PA Conforming Generator Product, integrated Google DeepMind's SynthID invisible watermarking into images generated by ChatGPT, Codex, and the OpenAI API, and launched a preview public verification tool that lets anyone check whether an image was generated by OpenAI's models. OpenAI also joined the C2PA Steering Committee. The combined approach pairs C2PA's signed cryptographic metadata (provenance trail of who created/edited content) with S