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 0x174ac4d0da76e96b8cb37e0fa0869af7a75270aa2bdf25fbfeb4604656e101d6. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96bc9e15-2ca8-4096-8611-c0e48dd681ab.json and https://artists.proofprofile.net/proofs/artist/96bc9e15-2ca8-4096-8611-c0e48dd681ab.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).