The Pro Arte String Quartet is a string quartet founded in Belgium, which became affiliated with the University of Wisconsin-Madison in 1941. History Origins 1912-1941 The Pro Arte String Quartet w
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 0x58df9f06ad0fd11db8ab3417f50bd2b4b30c1bb2618a283b9d87b527dbbd678f. Chain 2 (Bitcoin): anchored in block 953899 (2026-06-16T06:37:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/117d6611-7a89-4cff-8bbb-35c48abf2545.json and https://artists.proofprofile.net/proofs/artist/117d6611-7a89-4cff-8bbb-35c48abf2545.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Schumann: Piano Quintet in Eb, Op. 44 - Dvorak: Piano Quintet in A, Op. 81
Beethoven, Stravinsky, Hagen & Luckhardt: Chamber Music for Strings
Kolisch-Pro Arte Rarities: Schoenberg – String Quartet No. 2, String Trio & Ode to Napoleon (Live Historical Recordings)
Kolisch-Pro Arte Rarities: Schubert & Schumann (Historical Recordings)
Kolisch-Pro Arte Rarities: Schubert – Piano Quintet, D. 667 & String Trio, D. 581 (Live Historical Recordings)
Kolisch-Pro Arte Rarities: Schubert – String Quartets, D. 112 & D. 804 (Live Historical Recordings)
Kolisch-Pro Arte Rarities: Mozart – String Quartets, K. 589 & 590 (Live Historical Recordings)
Kolisch-Pro Arte Rarities: Mozart – String Quartets, K. 465 & 575 (Live Historical Recordings)
Haydn & Schubert: String Quartets (Live 1947 & 1949)
Dvořák, Wolf & Shostakovich: Chamber Works
Debussy & Ravel: String Quartets (Recorded Live 1947-1948)
Brahms: String Quartets Opp. 51 & 67 (Live)
Beethoven: String Quartets Op. 18 Nos. 1, 3, 5 & 6
The Pro Arte Quartet: Centennial Anniversary Commissions
Schubert: String Quintet, in C, for two violins, viola and two cellos D956 & Piano Quintet, in A
Arnold Elston: String Quartet - Gordon Binkerd: Cello Sonata
Andrew Imbrie: Music for String Quartet and Violin & Piano Duo
Schubert: String Quintet in C Major, Op. 163, D. 956 - Brahms: String Sextet No. 1 in B-Flat Major, Op. 18
Schumann: Quintette pour piano et cordes & Scènes d'enfants (Mono Version)
Schubert: Quintette "La truite" (Recording in 1935, Mono Version)
Mozart: Quintette à cordes, K. 516 & Quatuor pour piano et cordes, K. 478 (Recording in 1934, Mono Version)
Roger Sessions: String Quartet No. 1 in E Minor & Second String Quartet
Beethoven: String Quartets, Op. 59 Nos. 1 & 2 (Live)
Beethoven: String Quartet No. 12, Op. 127 & Große Fuge, Op. 133
Leguerney: Quatuor à cordes (Stereo Version)