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 0xc20641e05a7f4e1ebfb16d75746d43abf638de5060eb690aa52b9e25ffff8b3e. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa8b1503-dd8b-4d43-86b5-7ad9c85ea31b.json and https://artists.proofprofile.net/proofs/artist/aa8b1503-dd8b-4d43-86b5-7ad9c85ea31b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).