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 0x5f9e52641a85da28e0b394aaf1f22682f8263db52415b7d749264807ba558f97. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/209b8eaa-9bf4-4e0c-afdd-c968cfed7df8.json and https://artists.proofprofile.net/proofs/artist/209b8eaa-9bf4-4e0c-afdd-c968cfed7df8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
O Vasilis Soukas Kai To Klarino Tou, Vol. 5