← Block #37

Verify block #37 against Bitcoin

This takes about a minute, needs no account and no command line, and at no point do you have to trust this server: the check happens against Bitcoin, on a site we do not run.

1. Download the two small files for this block.
   block-000037.json (the statement) block-000037.json.ots (the proof)
   The statement says what we claim — block number, hash, seal time, and the address of its block page. The proof is the path from that claim into Bitcoin.
2. Open opentimestamps.org (opens in a new tab; it is the home of the open OpenTimestamps project, not ours).
3. Drag the proof file (.ots) onto the page, and when it asks for the original, give it the statement (.json). It recomputes the fingerprint and follows the proof to Bitcoin in your browser.

What you should see: the verifier reports that Bitcoin attests this data existed as of Bitcoin block 966087, 966092. You can cross-check that block number on any Bitcoin explorer or node — not just the one we link.

Prefer the command line? With the open client installed: ots verify block-000037.json.ots (both files in the same folder). Any OpenTimestamps client works; none of them ask us anything.

Every block’s files are listed at /api/anchors.