IZO is a 2004 Japanese surrealist period horror film directed by Takashi Miike. The main character of the film is Izo Okada (1832–1865), the historical samurai and assassin in 19th-century Japan who w
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 0x1e3a8cd918156e383b946a6cc66b3c6cda0de7ca80cbcf835c5fd993a339b93c. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a25b7160-4cf2-4032-b2b3-cfec6e1a1af7.json and https://artists.proofprofile.net/proofs/artist/a25b7160-4cf2-4032-b2b3-cfec6e1a1af7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).