Providers
Claude, OpenAI, Gemini, and Adobe Firefly have sourced profiles. No card says a watermark is independently detectable here unless a working detector exists.
Provider
Anthropic documents a statistical text watermark for supported new models and C2PA Content Credentials on supported generated files. AI Watermark Center can inspect Unicode and embedded credentials; it cannot currently detect Claude’s keyed text watermark.
Provider
OpenAI documents layered image provenance (C2PA and SynthID) on supported ChatGPT, Codex, and API outputs, SynthID on supported generated audio, a public verifier, and a Content Provenance API. A current OpenAI text watermark is not established. Research profile and image cluster available; AWC inspects embedded C2PA only.
Provider
Google DeepMind documents SynthID across image, video, audio, and Gemini text. Gemini Apps add invisible SynthID and Content Credentials on generated or edited media. Gemini’s verifier identifies Google AI SynthID, not every company’s watermark.
Provider
Adobe documents automatic Content Credentials on fully Firefly-generated assets, with Adobe as issuer and optional cloud storage for recovery. SynthID use is not established from the documentation reviewed here.