is a Japanese anime series written and directed by Junichi Sato. The initial four-episode original video animation (OVA) series was produced by Hal Film Maker and released over two Blu-ray Disc and D
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 0x78657304acbe87ddfdca750d4edc13855e25b81fae7917afe1242751fd5930b5. Chain 2 (Bitcoin): anchored in block 953877 (2026-06-16T02:39:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/038bd2f4-e69f-48c7-8efe-aa109e88c49c.json and https://artists.proofprofile.net/proofs/artist/038bd2f4-e69f-48c7-8efe-aa109e88c49c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).