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 0x32eaf0a98436ee001d1cbe5de0fb7ad816080d317740250186d7db77484e5920. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29ff4ed4-656d-479f-a9d9-87a1ce362308.json and https://artists.proofprofile.net/proofs/artist/29ff4ed4-656d-479f-a9d9-87a1ce362308.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
No I in Instrumental: A Tribute to Interpol
Say Hello to the Instrumentals: A Tribute to Interpol