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 0x5b2f4e9596ff53486e3e04e850f45a95c892cbea23035636eba5f3dac877e3e5. Chain 2 (Bitcoin): anchored in block 953991 (2026-06-16T18:47:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ee5b707-b116-4767-a0f9-90c16120e5e6.json and https://artists.proofprofile.net/proofs/artist/2ee5b707-b116-4767-a0f9-90c16120e5e6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
SHIRAKABA ~YOTA TANAKA SONGBOOK~ (vol.2)
Symphonic Poem GINGA21 (Piano Concerto Version)