is a Japanese actor born in Tokyo. He has appeared in a number of feature films, television series, and stage productions. His wife is actress Nana Eikura. Early life Kaku was born on July 3, 1988 a
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 0xb833a96dc6ea0ae551ded7f691ac99dd5b4c4c688a40e048cc25612a357de8e0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b28bf52-189d-4e68-a60c-13e02147c887.json and https://artists.proofprofile.net/proofs/artist/2b28bf52-189d-4e68-a60c-13e02147c887.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).