Earle Brown (December 26, 1926 – July 2, 2002) was an American music composer, producer, and educator who, as a composer, was a close associate of John Cage, and established his own formal and notatio
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 0x8c5f9c7ddfeb85213206da45afd898f8539dc25ebdf090fd400573f4ea35a5c0. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29e91054-e967-4134-a8fb-38197d88fc57.json and https://artists.proofprofile.net/proofs/artist/29e91054-e967-4134-a8fb-38197d88fc57.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Earle Brown: Music Essays (Arr. for Guitar)