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 0xfd182f18683333450d05d34c8bed4f640687abfbe1c538b0b37d172a974beec0. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1b9c521-5df6-47b2-b26a-437ac10ce5c1.json and https://artists.proofprofile.net/proofs/artist/d1b9c521-5df6-47b2-b26a-437ac10ce5c1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Jazz Ensemble and Chamber Orchestra 2017-2018
Grove City College 2014 Alumni Touring Choir (Live)