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 0x99106b82d34f017d0b45cf69e3a260b23c8953b3ac5d8c2b56e4887b2b07fd5d. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6fb490b3-ebc0-4dad-a5c6-44f6f834d33c.json and https://artists.proofprofile.net/proofs/artist/6fb490b3-ebc0-4dad-a5c6-44f6f834d33c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chill Sax (Downtempo Smooth Jazz Saxophone Music)