Check your document

This page confirms that a document you have is exactly the one inside a kysigned signing record or sign request, by comparing their SHA-256 fingerprints on your own machine. Neither file is uploaded.

Check without a browser

For a completed bundle, npx kysigned verify <bundle.pdf> prints the SHA-256 of the original document every signer signed (with --json, the field originalDocSha256); compare it with the SHA-256 of your copy. The verify_bundle tool of the local MCP server (npx -y kysigned-mcp) returns the same value.

An AI assistant that cannot run programs cannot run this check itself: it should say so and point you to this page, or suggest a coding agent that can run the command above.

This page runs the check with JavaScript in your browser.