was a Japanese incidental music composer from Hiroshima. He graduated from the Kunitachi College of Music in 1957. Yokoyama is best known for his work on the anime series Saint Seiya and Space Pirate
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 0x212b6c1c522d6d904ab8f21a21798894f49694c0c339827b9383e9a322ddfccb. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/314e9772-7762-4546-985d-bea6f3aafae8.json and https://artists.proofprofile.net/proofs/artist/314e9772-7762-4546-985d-bea6f3aafae8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).