Provenance
Anthropic publishes a technical account of how Claude's text watermark works
The post appeared on 14 August, twelve days after EU rules began requiring machine-readable marks on AI-generated content shown to European users.
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The short version
- Anthropic published 'How Claude's text watermark works' on 14 August 2026.
- The timing follows the EU AI Act's machine-readable marking obligation, which took effect on 2 August.
The post appeared on 14 August, twelve days after EU rules began requiring machine-readable marks on AI-generated content shown to European users.