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 0x370f0e35d6372c0c026e2e4200b5ad6c062e40ae42411f5f993caf622bce3fe3. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c083fe64-f43d-45df-aa3a-1bffa1329dfb.json and https://artists.proofprofile.net/proofs/artist/c083fe64-f43d-45df-aa3a-1bffa1329dfb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Organ Power! - Alan Morrison Plays the Heefner Memorial Organ
Morrison, Alan: Cathedral Basilica of the Sacred Heart
Celebration: 25 Years of the Albert Schweitzer Memorial Organ