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 0xba290fa8c4d6dac0c95c378548b308123af0fa7b0fe97a40b665db5c472308ad. Chain 2 (Bitcoin): anchored in block 953999 (2026-06-16T20:20:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3193fe45-b15a-4db4-bdd2-0d40e291d6b5.json and https://artists.proofprofile.net/proofs/artist/3193fe45-b15a-4db4-bdd2-0d40e291d6b5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).