thumb|Sake bottle, Japan, thumb|Sake barrel offerings at the Shinto shrine Tsurugaoka Hachimangū in Kamakura Sake, , or saki, also referred to as Japanese rice wine, is an alcoholic beverage of Japa
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 0x7e524674accfe4fb7c18b214142581ccec60400730b1cfc84a41d73d1caa3a83. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/82ee296b-ac75-4400-85e6-58ee1f418785.json and https://artists.proofprofile.net/proofs/artist/82ee296b-ac75-4400-85e6-58ee1f418785.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).