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 entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ade01393b63062f24b783d34fc88988b56a5e238cf302d4d2297a471802f73. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/49a746b4-9c1d-42c1-b341-0e6cc24c9892.json and https://artists.proofprofile.net/proofs/artist/49a746b4-9c1d-42c1-b341-0e6cc24c9892.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Colne Valley Male Voice Choir (Yorkshire)