The aron quartet is a string quartet ensemble which was founded in 1998 by Ludwig Müller, Barna Kobori, and Christophe Pantillon, four musicians working in Vienna. Their artistic careers have been de
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 0x39c0bb0c0f00d1d473af3e8abd8b07dba24feb3101fc9410a620177ecbc1ef30. Chain 2 (Bitcoin): anchored in block 954019 (2026-06-16T23:44:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/373f3aa2-619b-4979-83b1-4c4a20bd070c.json and https://artists.proofprofile.net/proofs/artist/373f3aa2-619b-4979-83b1-4c4a20bd070c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Korngold: String Sextet, Op. 10 & Suite, Op. 23