Antioch was a city located in northern Syria at the site of modern Antakya, Turkey. Founded in 300 BC, Antioch became one of the most important cities of the ancient eastern Mediterranean. The capital
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 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 0x15135b45b61e85d9ac731d227eab7489dabc1984c19ec59374823830b8ce6dc3. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63be9fb2-f7f5-45d1-afd4-91e22edeade2.json and https://artists.proofprofile.net/proofs/artist/63be9fb2-f7f5-45d1-afd4-91e22edeade2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).