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 entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa467e0b5d14339f5284dc0b572d3a9ed76095336d7b0b1b3c18435fd7fd32f. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c5aa449-5e54-4632-ab50-46709e2ab96d.json and https://artists.proofprofile.net/proofs/artist/1c5aa449-5e54-4632-ab50-46709e2ab96d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Alexander's Ragtime Band -1st Trumpet Track
Alexander's Ragtime Band- 2nd Trumpet Track
Bop Duet No. 9 (Arr. E. Darvarova & H. Wall)
Bop Duet No. 8 (Arr. E. Darvarova & H. Wall)