thumb|Atlantic winds (green), currents (blue) and approximate Portuguese sailing routes (red) during Henry the Navigator's (c.1430–1460) lifetime. The further south ships went, the wider off sailing r
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0a8e4544f9b02377ec177c2ac48e6ce93d94378bfffbf1053b223caca26dfa. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9261a629-e80b-47e6-b830-749b664197ca.json and https://artists.proofprofile.net/proofs/artist/9261a629-e80b-47e6-b830-749b664197ca.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
LIVE AT THE COOLER LOUNGE / LAS VEGAS NV / JULY 17TH 2002