The blog post from Anthropic on Aug 14, 2026 on how they watermark text in Claude output is very helpful.
“We’re implementing watermarking to comply with the EU AI Act. Anthropic, along with several other major AI model providers and around 190 total signatories, signed the EU Code of Practice on Transparency of AI-Generated Content in July 2026. This requires AI system providers to use methods of “marking” AI-generated text. We’re applying watermarking globally at launch because we don’t yet have a durable way to scope it by region.”
[My blog contains links to relevant readings in the style of an annotated bibliography, where I write a short note and link out to interesting articles. I generally refrain from providing my opinion, as these are very complex topics that require depth in discussion.]