1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa559701b1f80c6212a23d1b25b88d9904021ece17ea35e04af90eb169bf0d3c. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/524ac1b9-a715-4363-8d2c-16a114aa25de.json and https://artists.proofprofile.net/proofs/artist/524ac1b9-a715-4363-8d2c-16a114aa25de.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
British Church Composers, Vol. 7: Noel Rawsthorne
Psalm 150 "O Praise God in His Holiness" (1)
The Blackburn Service: V. The Acclamations
Psalm 150 "O Praise God in His Holiness" (2)