is a Japanese manga series written and illustrated by Yū Koyama. It was serialized in Shogakukan's manga magazine Big Comic Superior from 1994 to 2008, with its chapters collected in 48 volumes. 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 0x627ccf15539e8c5bfb53f6c9e905720593360cea41e09aaac761ad59dbeb3791. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2316961-199d-4e5a-a520-2db8c35237cc.json and https://artists.proofprofile.net/proofs/artist/e2316961-199d-4e5a-a520-2db8c35237cc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).