Turkey! - Nagano Prefectural Ikkokukan High School Bowling Club - Mai Otonashi CV.Hana Hishikawa
{"copyright_id":"0x39e60dc0d68aaac6b0009c7c47f02633f4f9eb0c81e08d2980fecf7327d8463b","name":"Turkey! - Nagano Prefectural Ikkokukan High School Bowling Club - Mai Otonashi CV.Hana Hishikawa","registered_at":"2026-06-16T16:06:11Z","symbol":"NIM1104024","token_address":"0xe45f79f980201269ef78136b1392175ddd2cc09e","type":"artist","uuid":"4c31bf1c-c8ec-419d-a08f-6e5bd28432ce"}
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e60dc0d68aaac6b0009c7c47f02633f4f9eb0c81e08d2980fecf7327d8463b. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c31bf1c-c8ec-419d-a08f-6e5bd28432ce.json and https://artists.proofprofile.net/proofs/artist/4c31bf1c-c8ec-419d-a08f-6e5bd28432ce.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).