On Tueday, Anthropic announced invisible watermarks in Claude's output. Within 24 hours, a "watermarks-remover" repo was live on GitHub. Version 0.3.0, CI passing, MIT license, and it doesn't stop at Claude: it targets Gemini's SynthID, OpenAI's provenance surfaces, and C2PA file metadata in one package, framed politely as "hygiene on content you own."
I'd call this the "token washing economy": every marking scheme creates a market for unmarking, and the economics run entirely one-way. Marking text costs the labs engineering effort, legal review, and EU coordination. Unmarking it costs one rewrite pass through any other model (the statistical signature doesn't survive paraphrasing, which Anthropic's own documentation concedes).
Three things follow for anyone building on or around this:
→ Provenance marks are evidence for cooperative actors only. They'll catch the lazy and the honest, never the motivated.
→ Any workflow that treats a watermark check as a control (hiring, publishing, education) is now auditing for effort, not authorship.
→ The compliance layer and the detection layer are officially separate markets. The first is mandatory and works. The second is voluntary and doesn't.
None of this makes the EU AI Act's transparency rules pointless. It makes them what they always were: disclosure obligations for the labs, not truth machines for the rest of us.