Hellsing is a Japanese manga series written and illustrated by Kouta Hirano. It was serialized in Shōnen Gahōsha's manga magazine Young King OURs from April 1997 to September 2008, with its chapters
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 0x9f40cb8cfd0eb0411d00a0dd741244d57d15779869f89378304f96c60ad26e39. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad5088dd-96d7-42b1-9dd7-43e413a8a122.json and https://artists.proofprofile.net/proofs/artist/ad5088dd-96d7-42b1-9dd7-43e413a8a122.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).