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 0x12381af4494194a6bb6e7e7cbab45b4a119175d3748776c7fc8adcca830bef18. Chain 2 (Bitcoin): anchored in block 953843 (2026-06-15T22:27:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00a085b5-8c7d-4c76-928e-ee5f0c03d0bd.json and https://artists.proofprofile.net/proofs/artist/00a085b5-8c7d-4c76-928e-ee5f0c03d0bd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).