OpenAI Verify Review — C2PA + SynthID Dual Watermarking for AI Image Provenance

On May 19, 2026, OpenAI joined the C2PA steering committee and began embedding Google DeepMind's SynthID watermark in all images generated via ChatGPT, the API, and Codex. The Verify research preview tool lets anyone check whether an image carries these signals. We explain what it does, how C2PA and SynthID differ, and what the initiative actually accomplishes — and what it doesn't.