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 0x43db8ec2f9fc97e1b64bc63fa70356417dd682b14a0e3cc26652e4f3a6688488. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9bde9527-5bf9-40e2-947b-f2be470ef7e2.json and https://artists.proofprofile.net/proofs/artist/9bde9527-5bf9-40e2-947b-f2be470ef7e2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).