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 0x6925575cd805c4d83aefa9c3e7e76c7ddc71c7ad4d3bbdccd7f9fe94adf57649. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7d3c3c5-603c-4a76-a71e-3109b45e1a6a.json and https://artists.proofprofile.net/proofs/artist/b7d3c3c5-603c-4a76-a71e-3109b45e1a6a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).