Nicolas Economou (; 11 August 1953 – 29 December 1993) was a Cypriot composer, pianist and conductor born in Nicosia, Cyprus. Economou came to international attention at the 1969 Tchaikovsky Competit
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 0xeea4f2328ec0e666e7b982c584f4f441d8e22b001661436e7da69f685f6564f5. 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/cef2e0d5-1e17-451c-bc01-c02fd388ca8a.json and https://artists.proofprofile.net/proofs/artist/cef2e0d5-1e17-451c-bc01-c02fd388ca8a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mussorgsky: Pictures At An Exhibition / Schumann: Kreisleriana, Op. 16
Bartók, Corea, Economou : "On two pianos" - L'art de Nicolas Economou, volume 7
Moussorgsky, Tchaïkovsky : L'art de Nicolas Economou, volume 3
Liszt & Shumann : L'Art de Nicolas Economou, volume 1