thumb|Franklyn Baur,1925Franklyn Baur (April 5, 1903 – February 24, 1950) was a popular tenor vocal recording artist.Gracyk, Tim with Frank Hoffman, Popular American Recording Pioneers: 1895--1925, Ha
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 0x5f5c7be2a045d04e36886e2aaca8072c8bab57ac555889c106b2765f99baf091. Chain 2 (Bitcoin): anchored in block 953895 (2026-06-16T05:46:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ebf4692-a0e2-4386-9f01-8a8d58286795.json and https://artists.proofprofile.net/proofs/artist/0ebf4692-a0e2-4386-9f01-8a8d58286795.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Popular 1920's Jazz Vocals (Recorded 1925-1929)