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 0xdd2905b34475353213c6627f9708274c15f76b4a0e611bdfc8ddc2329226f6d4. Chain 2 (Bitcoin): anchored in block 954573 (2026-06-20T15:45:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b46141d4-6dba-441b-9e07-a41db16638e6.json and https://artists.proofprofile.net/proofs/artist/b46141d4-6dba-441b-9e07-a41db16638e6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
カンテレ ドラマ「MADDER その事件、ワタシが犯人です」オリジナル・サウンドトラック
TV series「MADDER: I Am the Culprit in That Case」ORIGINAL SOUNDTRACK