thumb|A black leather ankle boot with studded embellishments thumb|Ancient Greek pair of terracotta boots. Early geometric period cremation burial of a woman, 900 BC, Ancient Agora Museum, Athens. A b
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 0x4787677a98865015c0f5409439a1512cb501015cadc51aed75b008e596d3f53a. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b18cc3e8-7fef-4eb1-8fc4-58f20c2ba771.json and https://artists.proofprofile.net/proofs/artist/b18cc3e8-7fef-4eb1-8fc4-58f20c2ba771.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).