Tatsuo (written: , , , , , , , , , , , , , , , , , or ) is a masculine Japanese given name. Notable people with the name include: , Japanese actor , Japanese engineer Tatsuo Fukuda (福田達夫, born 1967)
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 0xae7cbdb915fd04c0e643ff0cf72a09294ba4eb051e75c03c2ce5fd48127048f4. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b26bbc6e-251f-4c1f-a86d-4f85ee5aac41.json and https://artists.proofprofile.net/proofs/artist/b26bbc6e-251f-4c1f-a86d-4f85ee5aac41.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).