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 0x702f902b077664e6b0dcb1cc085f6fa63b1b5ecd406c7ab468da073ad1161396. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f5eb897d-179c-42ad-a3fb-d1ba18110198.json and https://artists.proofprofile.net/proofs/artist/f5eb897d-179c-42ad-a3fb-d1ba18110198.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Forbidden Temple (ThinkSpace Education x Jason Graves Scoring Competition)
Valkyrie Ascension (Original Video Game Soundtrack)
VERSO (Original Motion Picture Soundtrack)