Rex Jim Lawson (4 March 1938 – 16 January 1971), known as Cardinal Rex, was a singer, trumpeter and bandleader from Buguma in present Rivers State, Nigeria. He became one of the best-known highlife mu
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 0x4482cdf4c93ee6d0f9c98d13834ba8cf6e4c15259258e6bf27a63806bf093e5a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f70b47d8-8cc2-4243-9f58-83bac207936b.json and https://artists.proofprofile.net/proofs/artist/f70b47d8-8cc2-4243-9f58-83bac207936b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Aeolian Company: Original Compositions and Arrangements for Pianola
The Aeolian Company: Original Compositions & Arrangements for Pianola