fine-O/青葉 つむぎ(CV.石川 界人)、天祥院 英智(CV.緑川 光)、乱 凪砂(CV.諏訪部 順一)、巴 日和(CV.花江 夏樹)
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 0x561fe84b46d8a5aa2aa92acc12e828e4a0f2ee55a4022a6348301dbe6c1e799c. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/14fd6304-7c40-4d21-b5ce-dc4a2c1a1503.json and https://artists.proofprofile.net/proofs/artist/14fd6304-7c40-4d21-b5ce-dc4a2c1a1503.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
あんさんぶるスターズ！！ fine-O「Dawning Angels」 (Game Edit)