Kokei may refer to: Kōkei (monk) (c. 977 – 1049), Japanese Buddhist monk Kōkei (sculptor) (fl. 1175 – 1200), Japanese sculptor
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 0x1c337a3d98e967aacdb80b27d41b1f029580e10d678d2936f5020caf5148e183. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d00c6180-296c-42c5-bc90-a48bc926fe53.json and https://artists.proofprofile.net/proofs/artist/d00c6180-296c-42c5-bc90-a48bc926fe53.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).