John Everett Sandlin Jr. (April 16, 1945 – September 19, 2017) was an American recording engineer and record producer. He is best known for producing albums by bands such as the Allman Brothers Band,
{"copyright_id":"0x4010db0dcb077053b4afebc02394ed2e0fa0712c80dd324ed2fee051a44687ca","name":"Johnny Sandlin","registered_at":"2026-06-21T01:50:33Z","symbol":"NIM1782239","token_address":"0xd45ab7ec0e9a6f7cdbf55ebec22cc75c9a1ca649","type":"artist","uuid":"d25fea76-2faa-4cff-bd5f-ef5b35a0aaf9"}
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 0x4010db0dcb077053b4afebc02394ed2e0fa0712c80dd324ed2fee051a44687ca. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d25fea76-2faa-4cff-bd5f-ef5b35a0aaf9.json and https://artists.proofprofile.net/proofs/artist/d25fea76-2faa-4cff-bd5f-ef5b35a0aaf9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).