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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ba97a8f008302fc0227c563515d3562e154d01796d8d9b7f994b1225da6a17. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4c9dc2f-9ae6-4a06-b7da-ac0d45e0ee38.json and https://artists.proofprofile.net/proofs/artist/b4c9dc2f-9ae6-4a06-b7da-ac0d45e0ee38.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Voices Only 2012 College A Cappella, Volume One
Voices Only 2017, Vol. 2 (College & High School a Cappella)
Voices Only 2013 College A Cappella, Vol. 2