Upload a proof bundle and every hash in it is recomputed here, in your browser, and compared. If a payload was edited, a link was rewritten, or records were reordered, it fails. Runs entirely in your browser. No account required.
The bundle contains a SHA-256 hash chain over RFC 8785 canonical payloads. Any standard cryptography library can verify these, DarkMatter does not need to exist for the math to work.
Check a full set of records in one pass and quickly spot any failures. Upload multiple proof bundles to verify them together.