Watermarking

Watermarking embeds a hidden, machine-readable signal into digital content — text, images, audio, or video — to mark its origin or history. As AI-generated material spreads online, watermarking has become a key tool for provenance and disclosure, and regulators such as the EU are starting to require it. This hub tracks how companies and lawmakers are putting watermarking into practice.

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Anthropic Adds Invisible Watermarks to All Claude Outputs

13 August 2026

Anthropic is embedding machine-readable marks in Claude's text and files worldwide, meeting new EU AI Act transparency rules that took effect on August 2.

The California State Capitol building in Sacramento, seat of the legislature that passed the AI Transparency Act

What Is California's AI Transparency Act — and Who Must Comply?

6 August 2026

California now requires large AI image, video, and audio tools to watermark their output and offer a free way to check it. Here's what the law requires, and who it covers.

The California State Capitol building in Sacramento, where lawmakers passed the state's AI Transparency Act.

California's AI Transparency Act Takes Effect, Mandates Watermarks

2 August 2026

California's AI Transparency Act took effect August 2, requiring major AI image, video, and audio generators to offer free detection tools and embed hidden origin watermarks.