Anthropic has begun attaching machine-readable marks to the text and images that its Claude models generate, and will apply them to users worldwide rather than only in Europe, after signing a European Union code of practice tied to new transparency rules that took effect on 2 August 2026.
Source: [TNW](https://thenextweb.com/news/anthropic-watermarks-claude-output-eu-ai-act-article-50)