(trading as Takara Tomy in Asia and Tomy elsewhere) is a Japanese toy company. It was established in 1924 by Eiichirō Tomiyama as , became known for creating popular toys like the B-29 friction toy
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 0x3d530e28f02d148a429e736101a98df12f571f0368fe8c289f2b80139c8ddee7. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d90b5f7f-6287-46ee-8316-e94ab704aefe.json and https://artists.proofprofile.net/proofs/artist/d90b5f7f-6287-46ee-8316-e94ab704aefe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).