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 0x3f872be2d1c0a496a0c2d78ca46d7a51435ffebffe26975f862bf2f09da2ca0b. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd0ed446-9b34-4615-82d8-8ae355dc536c.json and https://artists.proofprofile.net/proofs/artist/cd0ed446-9b34-4615-82d8-8ae355dc536c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
ROSE GUNS DAYS ~Music of 23city~ (SOUND TRACKS2)
トライアンソロジーオリジナルサウンドトラック 学園恋愛編
Red Soul (うみねこのなく頃に散 イメージサウンドトラック)
ROSE GUNS DAYS～23番市の音楽～ORIGINAL SOUND TRACK２