Mack Kendree Harrell, Jr. (October 8, 1909 — January 29, 1960) was an American operatic and concert baritone vocalist who was regarded as one of the greatest American-born lieder singers of his genera
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 0x38fb6df65d678c51e2b5f788281aaf2ff3cf8c2a9a8cab0de74df67334fe9c1f. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c809e922-faee-4e2e-8366-740aaae2ac1a.json and https://artists.proofprofile.net/proofs/artist/c809e922-faee-4e2e-8366-740aaae2ac1a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Thomson: 3 Pictures for Orchestra & 5 Songs from William Blake (Remastered)