thumb|220px|right|Chess initial position The game of chess is commonly divided into three phases: the opening, middlegame, and endgame.John Watson, Secrets of Modern Chess Strategy: Advances Since Ni
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 0xb3bc222547b238e8b1af4d8e3743fd9a14eb05eac4eadfad5730903b61d46387. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4f35f67-5e64-426c-b377-3e2c67e8bb5a.json and https://artists.proofprofile.net/proofs/artist/e4f35f67-5e64-426c-b377-3e2c67e8bb5a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).