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 0x98cc40914836736ddf13c86b7fb4664ee212bad33f1520341c43e0609fc6ad15. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d0e1818-34f1-4d59-bb0d-f0589beb4eaa.json and https://artists.proofprofile.net/proofs/artist/7d0e1818-34f1-4d59-bb0d-f0589beb4eaa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).