Gordon Mumma (born March 30, 1935, in Framingham, Massachusetts) is an American composer. He is known most for his work with electronics, many devices of which he builds himself, and for his performan
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 0x76e348f6a045f30247e1fbcc194c6f512e8dbcbf73ce86d7cd532ce859d39fd0. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/704ec0ef-9b11-4c10-b840-c51dc7b92d8a.json and https://artists.proofprofile.net/proofs/artist/704ec0ef-9b11-4c10-b840-c51dc7b92d8a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Gordon Mumma: Music for Solo Piano (1960-2001)
Gordon Mumma: Electronic Music Of Theater And Public Activity