MANKAI STAGE『A3!』ACT2! ~AUTUMN 2022~ オールキャスト
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 0xe729a49c2749a4d9b61a70af7c4a5b7df9bca0e617e312f1ab8b11c7a3f772aa. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c005adec-b9b7-4e1f-a3e7-5057ea611f2e.json and https://artists.proofprofile.net/proofs/artist/c005adec-b9b7-4e1f-a3e7-5057ea611f2e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).