Toshi may refer to: Toshi (given name), people with the given name Toshi Toshihiko Tahara (born 1961), Japanese idol singer, a solo vocalist Toshi (musician) (Toshimitsu Deyama, born 1965), a 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 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 0x5fb7800904e0e10d1431a1af4cdc186ef7b145c67b1d033ca45911779406f318. Chain 2 (Bitcoin): anchored in block 954580 (2026-06-20T17:48:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7f620db-02da-4138-8f74-08c7a0317e52.json and https://artists.proofprofile.net/proofs/artist/b7f620db-02da-4138-8f74-08c7a0317e52.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).