thumb|At the Norwich Festival, 1977:(l-r: Sue Kirkpatrick (Harris), Pennie Harris, John Kirkpatrick, Geoff Harris) thumb|Sue Harris and John Kirkpatrick on stage at Greenwich, London, 1982 thumb|Harri
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 0x87b5d751837a487e0468d5913595f4387513deda5c8cd10479b93ae944dcc791. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5943bee4-c221-4c25-9d80-e66b052c44b2.json and https://artists.proofprofile.net/proofs/artist/5943bee4-c221-4c25-9d80-e66b052c44b2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pastorela (Music of the Hammered Dulcimer)