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 0x4c4079182a72c8b26f5d32b169522f0cc825224e09a7d3c7abfea18056fe9fa8. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fbff29ca-e67a-4359-b1b4-9902bbf7c635.json and https://artists.proofprofile.net/proofs/artist/fbff29ca-e67a-4359-b1b4-9902bbf7c635.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
When the Wind Blows - The Songs of Townes Van Zandt