is a singer born on January 11, 1980, in Soma, Fukushima Prefecture, Japan. See BabeStar Profile of Sayuri Horishita. Retrieved July 3, 2006. The music video for her song "Kaze no Tōri Michi" aired o
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 0x8af6963156dccb7bf2b98caac8eef3f64336440f27c3417f5c3202060e491a87. Chain 2 (Bitcoin): anchored in block 954500 (2026-06-20T04:47:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9cf70c81-67b3-4405-9e07-a5983fdeeac6.json and https://artists.proofprofile.net/proofs/artist/9cf70c81-67b3-4405-9e07-a5983fdeeac6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).