is a Japanese manga series written and illustrated by Gege Akutami. It was serialized in Shueisha's manga magazine Weekly Shōnen Jump from March 2018 to September 2024, with its chapters collected i
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 0x820d5f94b05eb0a19e78aa0474cb783c55515534af13c5539716078ad78a564f. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7539edc0-9969-4b9e-ab58-05bd27cb12cb.json and https://artists.proofprofile.net/proofs/artist/7539edc0-9969-4b9e-ab58-05bd27cb12cb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).