Check if a file was made with Claude

Back to Devoured - September 03, 2026

DEVOURED

Check if a file was made with Claude

AI researchsecurity Claude

Anthropic released a browser-based tool that detects C2PA-compliant credentials to verify if a file was generated or modified by Claude.

What: The tool reads metadata embedded in files using the C2PA open standard to determine if Claude produced the content, though it cannot detect AI-generated text or verify the origin of content within a file.

Why it matters: This move aims to standardize provenance and transparency for AI-generated media, matching efforts by Google DeepMind and OpenAI, though its effectiveness relies entirely on the presence of voluntary metadata signatures.

Decoder

C2PA (Coalition for Content Provenance and Authenticity): An open technical standard that allows creators to embed cryptographically signed metadata into digital content to verify its origin and edit history.
Content credential: A digital record stored in a file's metadata that provides context about how that file was produced or altered.

Original article

This tool identifies the text watermark Claude uses to produce files.

Explore all 59 articles in today's digest