{"type":"analysis","id":"analysis:research-claude-marks-supported-text-worldwide-it-is-not-a-stamp-on-every-output","slug":"research-claude-marks-supported-text-worldwide-it-is-not-a-stamp-on-every-output","title":"Claude marks supported text worldwide; it is not a stamp on every output","description":"Anthropic is rolling out imperceptible SynthID-style text watermarks and C2PA file credentials under the EU AI Act. The policy is real and global, but it does not cover every model or file type, and the public still cannot check text.","published_at":"2026-10-26T08:00:00.000Z","updated_at":"2026-10-26T08:00:00.000Z","record_date":"2026-10-26","topics":["claude","anthropic","google","research"],"source_urls":["https://support.claude.com/en/articles/16266773-how-claude-marks-ai-generated-content","https://digital-strategy.ec.europa.eu/en/policies/code-practice-ai-generated-content","https://digital-strategy.ec.europa.eu/en/news/strong-backing-code-practice-transparency-ai-generated-content","https://www.anthropic.com/news/claude-text-watermark","https://docs.anthropic.com/en/release-notes/overview","https://www.nature.com/articles/s41586-024-08025-4","https://ai.google.dev/responsible/docs/safeguards/synthid","https://www.theverge.com/ai-artificial-intelligence/980869/anthropic-claude-watermarks-synthid-text-system","https://techcrunch.com/2026/08/15/anthropic-shares-more-details-about-how-claudes-new-watermarks-will-work/","https://docs.anthropic.com/en/docs/agents-and-tools/tool-use/code-execution-tool","https://docs.anthropic.com/en/docs/build-with-claude/files","https://claude.com/check-content","https://digital-strategy.ec.europa.eu/en/library/how-sign-code-practice-transparency-ai-generated-content"],"language":"en","routes":{"html":"https://newruntime.com/analysis/research-claude-marks-supported-text-worldwide-it-is-not-a-stamp-on-every-output/","markdown":"https://newruntime.com/analysis/research-claude-marks-supported-text-worldwide-it-is-not-a-stamp-on-every-output.md","json":"https://newruntime.com/analysis/research-claude-marks-supported-text-worldwide-it-is-not-a-stamp-on-every-output.json"},"author":{"role":"author","name":"Andrey Reshetnikov","profile":"https://newruntime.com/owner-profile.md","profile_json":"https://newruntime.com/owner-profile.json","same_as":["https://www.linkedin.com/in/reshetnikov1/","https://t.me/lapetuse"]},"editorial_provenance":{"desk":"authorial","target_ref":"deep_research:7586ac0a-11bb-45eb-8f0d-2d165dda246d","authorial_article_id":"7586ac0a-11bb-45eb-8f0d-2d165dda246d"},"next_reads":[{"type":"topic","path":"/topics/claude/","url":"https://newruntime.com/topics/claude/","title":"Claude","reason":"Explore the claude topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/claude.md","json_url":"https://newruntime.com/topics/claude.json"},{"type":"topic","path":"/topics/anthropic/","url":"https://newruntime.com/topics/anthropic/","title":"Anthropic","reason":"Explore the anthropic topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/anthropic.md","json_url":"https://newruntime.com/topics/anthropic.json"},{"type":"topic","path":"/topics/google/","url":"https://newruntime.com/topics/google/","title":"Google","reason":"Explore the google topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/google.md","json_url":"https://newruntime.com/topics/google.json"},{"type":"collection","path":"/analysis/","url":"https://newruntime.com/analysis/","title":"Analysis","reason":"Open the latest authorial analysis.","media_type":"text/html","json_url":"https://newruntime.com/analysis.json"},{"type":"collection","path":"/source-ledger.json","url":"https://newruntime.com/source-ledger.json","title":"Source Ledger","reason":"Inspect the public source evidence graph.","media_type":"application/json"}]}