is a Japanese manga series written and illustrated by Junji Ito. It was serialized in Big Comic Spirits Zōkan Casual from September 2004 to July 2005, and published in one volume. Plot In a futurist
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 0xa54545ece51429da306d7b0833c850832c747b72812c8b18706b84204939ad76. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b122e9ac-2e05-47b8-903a-917c7013082f.json and https://artists.proofprofile.net/proofs/artist/b122e9ac-2e05-47b8-903a-917c7013082f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).