1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x88d3829fc44da049fc87da5007e6ab0e833ce5a073464b342f5519c00aa754ce. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e52b308-eaf7-48ed-a7a1-070409e05712.json and https://artists.proofprofile.net/proofs/artist/9e52b308-eaf7-48ed-a7a1-070409e05712.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
「拝啓、永田町」「たまゆら」オリジナルサウンドトラック2
「拝啓、永田町」「たまゆら」オリジナルサウンドトラック①
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Perfect adultery (Kanzen Furin-Kakusu Bigaku, Abaku Kakugo-) Original Soundtrack