Verify a chain
Everything happens in your browser. The file is not uploaded; nothing leaves your machine. This page is an independent JavaScript implementation of the chain rules (SCHEMA.md), held to the same conformance vectors as the Python reference — and if you trust neither, read this page's verifier or run the Python one instead. That is the point.
Drop a chain file here, or click to choose one
Or paste chain JSON:
Pre-genesis note: the real chain does not exist yet — record 0 seals at the Genesis Window. Until then you can verify staging chains built by the test suite, or run the conformance battery against this implementation.