The Alban Berg Quartett (ABQ) was a string quartet founded in Vienna, named after the composer Alban Berg. Active from 1970 to 2008, the group included first violinist Günter Pichler and cellist Valen
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39f7f2644d15b9ca1e07548ef9585db1712e3e2e14b5d9044030e717f6fc76b. 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/3f903a35-318e-4199-8188-bcb6a030964e.json and https://artists.proofprofile.net/proofs/artist/3f903a35-318e-4199-8188-bcb6a030964e.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Schubert, Dvořák, Brahms & Schumann: Piano Quintets
Brahms: String Quartet No. 1 in C Minor, Op. 51 No. 1: I. Allegro
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3941e1c6d431070a8b539b5c4c149f3e859bf43ab0c38f7bdd43a8ede02ea35. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9102583 — a six-check JSON result.
Schubert: String Quartets Nos. 9, 10, 12, 13 "Rosamunde", 14 "Death and the Maiden" & 15, Trout Quintet & String Quintet
Schubert: String Quintet in C Major, Op. 163, D. 956: I. Allegro ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39517b59578923f923632c4e29dbb053cbb477768f463336bcd18264576b0ed0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8200126 — a six-check JSON result.
Schubert: String Quintet in C Major, Op. 163, D. 956: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0f61e57536c45ca6ced7f140f8f290f1ac92d992a659ee79a28a5034ea6bb6. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8200127 — a six-check JSON result.
Schubert: String Quintet in C Major, Op. 163, D. 956: III. Scherzo. Presto - Trio. Andante sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa902718fdf7441c13f42b73dd36dad88e09cbfad1b07c742571c75635271783a. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8200128 — a six-check JSON result.
Schubert: String Quartet No. 14 in D Minor, D. 810 "Death and the Maiden": I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728653bcc6c5abd896f75e9ba1ab5744d9f5eb86b1527ac1bd4c9bc6f56a4bc8. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8400889 — a six-check JSON result.
Schubert: String Quartet No. 14 in D Minor, D. 810 "Death and the Maiden": IV. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe479de0955f850674eb55f3857cf615870574b2c6172c6ae42cb2ce83c79172a. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8400892 — a six-check JSON result.
Schubert: String Quartet No. 13 in A Minor, Op. 29, D. 804 "Rosamunde": I. Allegro ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24975fc54baa1efead62db242def377840b17cc93ecfe5a1902db7efdbe79b90. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8400894 — a six-check JSON result.
Beethoven: String Quartet No. 1 in F Major, Op. 18 No. 1: I. Allegro con brio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd95e9659b3951dc9277cb8386a6b199a8baf0dbcfd7147ad239e69831928fe. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8500516 — a six-check JSON result.
Beethoven: String Quartet No. 2 in G Major, Op. 18 No. 2: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5eab3568966e0a48f5ed400dc440b957041e326bb466262fad2a26a6006bce. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8500521 — a six-check JSON result.
Beethoven: String Quartet No. 3 in D Major, Op. 18 No. 3: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28b25ce1f1a232c2de1a54f1291faa628c97811ed395d01b65d1ad160c4b835. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8500526 — a six-check JSON result.
Beethoven: String Quartet No. 4 in C Minor, Op. 18 No. 4: I. Allegro ma non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98cee9bb2e7dbe55fe6f6d408ea9332ff387d866ae311c03a7fb4e5e71a1b273. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8500531 — a six-check JSON result.
Beethoven: String Quartet No. 8 in E Minor, Op. 59 No. 2 "Razumovsky": I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117d466fd47dbf8b7ee3d6ac85d805276382472ab12f8c1476c712a1fa4eaf95. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC7900111 — a six-check JSON result.
Beethoven: String Quartet No. 1 in F Major, Op. 18 No. 1: II. Adagio affettuoso ed appassionato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5352bb064566e5d980bd9d3a4e9d90373bd9b112c2e71949da26fe3280437dff. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8500517 — a six-check JSON result.
Beethoven: String Quartet No. 3 in D Major, Op. 18 No. 3: II. Andante con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c24d75fc973773f27c2e86bb050cdca784125c1da680980ef1b35709d2dba54. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8500527 — a six-check JSON result.
Beethoven: String Quartet No. 4 in C Minor, Op. 18 No. 4: II. Scherzo. Andante scherzoso quasi allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefd0b1afe624e790af20c134863e8227bc5383c0f8c8098a795a5bbaa7cdeb9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8500532 — a six-check JSON result.
Beethoven: String Quartet No. 8 in E Minor, Op. 59 No. 2 "Razumovsky": II. Molto adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6a60312d652bad6755804c097c023f50e5bb165c2ee3d1f0259c16cdda9fed. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC7900112 — a six-check JSON result.
Beethoven: String Quartet No. 1 in F Major, Op. 18 No. 1: III. Scherzo. Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e70df86596010a6bc7569cece310a474d2d997d9669d738c0b623f6b3c9e93. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8500518 — a six-check JSON result.
Beethoven: String Quartet No. 2 in G Major, Op. 18 No. 2: III. Scherzo. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f54fb2497433689a092dbea4cbefe24be15adb87e071a6e9a08e49b59c5698. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8500523 — a six-check JSON result.
Beethoven: String Quartet No. 3 in D Major, Op. 18 No. 3: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b149eca33f637411c2037da3872c9bfda4d0e9be7b92d8355a96f5e3b7d7aa. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8500528 — a six-check JSON result.
Beethoven: String Quartet No. 4 in C Minor, Op. 18 No. 4: III. Menuetto. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa1a136363a777b6c4b57feef1e910bbadf95f4b78ca273ffef0150a11a9a08. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8500533 — a six-check JSON result.
Beethoven: String Quartet No. 1 in F Major, Op. 18 No. 1: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a57d632ed4fbd73bd3dfdbb6e10f9906dccd4f402ab111226655252c1fed65. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8500519 — a six-check JSON result.
Beethoven: String Quartet No. 2 in G Major, Op. 18 No. 2: IV. Allegro molto quasi presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e37f98237f710aa4dd6963f783300a30ef2eca163f49a51a2d0f89fcf94f0e. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8500524 — a six-check JSON result.
Beethoven: String Quartet No. 3 in D Major, Op. 18 No. 3: IV. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801c8cb689fcfe096b413c769ba01017bdd9c88dfd8b40462bcbf82e6e5d23d6. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8500529 — a six-check JSON result.
Beethoven: String Quartet No. 4 in C Minor, Op. 18 No. 4: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef36ed7b104829055096fe4def869945ab80761eb6f83d3f4572633e0c6afb31. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8500534 — a six-check JSON result.
Beethoven: String Quartet No. 6 in B-Flat Major, Op. 18 No. 6: I. Allegro con brio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa304f09a9abf79c1df5c99ec036856a680b5e7b9352dcecf3a5bc1823cdba784. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8500541 — a six-check JSON result.
Beethoven: String Quartet No. 5 in A Major, Op. 18 No. 5: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67ff59438579630fec6e9b1a367ab0d36523085995a1a1fbbd7b12290f4c456. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8500536 — a six-check JSON result.
Beethoven: String Quartet No. 13 in B-Flat Major, Op. 130: I. Adagio ma non troppo - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e9e1b7206e9e5b860a27bd93db398db7edcb222f38ab9358303a1262f8cc5a. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8200463 — a six-check JSON result.
Beethoven: String Quartet No. 7 in F Major, Op. 59 No. 1 "Razumovsky": II. Allegretto vivace e sempre scherzando
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbf6b4cff84f831b7385821cf93507ef0d2f11649907d253b0348a49c0e0a15. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1201017 — a six-check JSON result.
Beethoven: String Quartet No. 6 in B-Flat Major, Op. 18 No. 6: II. Adagio ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7189dbaf76c7ed1b6b31a86bddba11aafdf157cfe4c31ecd0acc4f9167710359. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8500542 — a six-check JSON result.
Beethoven: String Quartet No. 5 in A Major, Op. 18 No. 5: II. Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a63d6916faf2c9a6215c52541c4cc46d06d40162b31ca02cf8e7b2c0f16f69e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8500537 — a six-check JSON result.
Beethoven: String Quartet No. 13 in B-Flat Major, Op. 130: II. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6b02b23fa39686dd02190ce7a1e2164b7334751e64bb94b1669b4a0e2e5222. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8200464 — a six-check JSON result.
Beethoven: String Quartet No. 12 in E-Flat Major, Op. 127: II. Adagio ma non troppo e molto cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e0938843f8dc233acac79f958a630b8c8b51eb7c4471647e071df2bbf1af5b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8100144 — a six-check JSON result.
Beethoven: String Quartet No. 7 in F Major, Op. 59 No. 1 "Razumovsky": III. Adagio molto e mesto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8c64889c96b702d163061496d658409afe65379cdbfb091c4bed8c02bf4af0. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1201018 — a six-check JSON result.
Beethoven: String Quartet No. 6 in B-Flat Major, Op. 18 No. 6: III. Scherzo. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe9eb163ae5c81f47e261c3286be93f009cb28b5f744cd5d54b1c954e743ee2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8500543 — a six-check JSON result.
Beethoven: String Quartet No. 5 in A Major, Op. 18 No. 5: III. Andante cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ecf5185ad211a632d3ba5deffd10faa8e443441e6cacb29955d1458d6c61870. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8500538 — a six-check JSON result.
Beethoven: String Quartet No. 7 in F Major, Op. 59 No. 1 "Razumovsky": IV. Thème russe. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd768cf93bd13c9afd76861bf7f2fcc217a1df9b630036ab3475461465579cf99. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1201019 — a six-check JSON result.
Beethoven: String Quartet No. 6 in B-Flat Major, Op. 18 No. 6: IV. La malinconia. Adagio - Allegretto quasi allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793aca9c7daee3f6dbca381afe7c74b1852e6e6bbd026b18aa07bf6ff39af8a6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8500544 — a six-check JSON result.
Beethoven: String Quartet No. 5 in A Major, Op. 18 No. 5: IV. Allegro
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Beethoven: String Quartet No. 16 in F Major, Op. 135: I. Allegretto
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Beethoven: String Quartet No. 11 in F Minor, Op. 95 "Quartetto serioso": I. Allegro con brio
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Beethoven: String Quartet No. 13 in B-Flat Major, Op. 130: V. Cavatina. Adagio molto espressivo
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Beethoven: String Quartet No. 16 in F Major, Op. 135: II. Vivace
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Beethoven: String Quartet No. 11 in F Minor, Op. 95 "Quartetto serioso": II. Allegretto ma non troppo
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Beethoven: Grosse Fuge in B-Flat Major, Op. 133
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Beethoven: String Quartet No. 16 in F Major, Op. 135: III. Lento assai, cantante tranquillo
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Beethoven: String Quartet No. 11 in F Minor, Op. 95 "Quartetto serioso": III. Allegro assai vivace, ma serioso
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Beethoven: String Quartet No. 16 in F Major, Op. 135: IV. Grave ma non troppo tratto - Allegro
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Beethoven: String Quartet No. 11 in F Minor, Op. 95 "Quartetto serioso": IV. Larghetto espressivo - Allegretto agitato
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Janácek: String Quartets & Dvorák: Piano Quintet in A - Dumka
Alban Berg Quartet - The Teldec Recordings
Mozart: String Quartet No. 15 in D Minor, Op. 10 No. 2, K. 421: III. Menuetto. Allegretto
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Beethoven: String Quartet No. 7 in F Major, Op. 59 No. 1 "Razumovsky": I. Allegro
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Smetana: String Quartet No. 1 in E Minor "From My Life": I. Allegro vivo appassionato
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Ravel: String Quartet, M. 35: I. Allegro moderato - Très doux
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Haydn: String Quartet in C Major, Op. 76 No. 3, Hob. III:77 "Emperor": I. Allegro
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Smetana: String Quartet No. 1 in E Minor "From My Life": II. Allegro moderato à la Polka
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Ravel: String Quartet, M. 35: II. Assez vif - Très rythmé
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Haydn: String Quartet in C Major, Op. 76 No. 3, Hob. III:77 "Emperor": II. (a) Poco adagio, cantabile
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Smetana: String Quartet No. 1 in E Minor "From My Life": III. Largo sostenuto
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Ravel: String Quartet, M. 35: III. Très lent
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Haydn: String Quartet in C Major, Op. 76 No. 3, Hob. III:77 "Emperor": II. (b) Variation I
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Smetana: String Quartet No. 1 in E Minor "From My Life": IV. Vivace
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Ravel: String Quartet, M. 35: IV. Vif et agité
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Haydn: String Quartet in C Major, Op. 76 No. 3, Hob. III:77 "Emperor": II. (c) Variation II
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Mendelssohn: String Quartet No. 2 in A Minor, Op. 13, MWV R22: I. Adagio - Allegro vivace
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String Quartet No. 2, 'Intimate Letters': I. Andante
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Haydn: String Quartet in C Major, Op. 76 No. 3, Hob. III:77 "Emperor": II. (d) Variation III
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Mendelssohn: String Quartet No. 2 in A Minor, Op. 13, MWV R22: II. Adagio non lento
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String Quartet No. 2, 'Intimate Letters': II. Adagio
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Haydn: String Quartet in C Major, Op. 76 No. 3, Hob. III:77 "Emperor": II. (e) Variation IV
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Mendelssohn: String Quartet No. 2 in A Minor, Op. 13, MWV R22: III. Intermezzo. Allegretto con moto - Allegro di molto
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String Quartet No. 2, 'Intimate Letters': III. Moderato
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Berg: Lyric Suite for String Quartet: III. Allegro misterioso - Trio estatico
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Haydn: String Quartet in C Major, Op. 76 No. 3, Hob. III:77 "Emperor": III. Menuetto. Allegro
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Mendelssohn: String Quartet No. 2 in A Minor, Op. 13, MWV R22: IV. Presto
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String Quartet No. 2, 'Intimate Letters': IV. Allegro
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Haydn: String Quartet in C Major, Op. 76 No. 3, Hob. III:77 "Emperor": IV. Finale. Presto
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Bartók: String Quartet No. 4 in C Major, Sz. 91: I. Allegro
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Mozart: String Quartet No. 20 in D Major, K. 499 "Hoffmeister": I. Allegretto
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Bartók: String Quartet No. 4 in C Major, Sz. 91: II. Prestissimo, con sordino
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Mozart: String Quartet No. 20 in D Major, K. 499 "Hoffmeister": II. Menuetto. Allegretto
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Bartók: String Quartet No. 4 in C Major, Sz. 91: III. Non troppo lento
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Stravinsky: Double Canon for String Quartet "Raoul Dufy in memoriam"
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Mozart: String Quartet No. 20 in D Major, K. 499 "Hoffmeister": III. Adagio
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Mozart: String Quartet No. 20 in D Major, K. 499 "Hoffmeister": IV. Allegro
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Bartók: String Quartet No. 4 in C Major, Sz. 91: IV. Allegretto pizzicato
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Rihm: String Quartet No. 4: I. Agitato, allegro - Alla marcia, allegro ma non troppo (Live at Vienna Konzerthaus, 1990)
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Hoffstetter: String Quartet in F Major, Op. 3 No. 5: II. Andante cantabile "Serenade" (Formerly Attributed to Haydn as Hob. III:17)
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Bartók: String Quartet No. 4 in C Major, Sz. 91: V. Allegro molto
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Beethoven: String Quartet No. 16 in F Major, Op. 135: I. Allegretto (Live at Konzerthaus, Wien, 1989)
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Beethoven: String Quartet No. 16 in F Major, Op. 135: II. Vivace (Live at Konzerthaus, Wien, 1989)
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Beethoven: String Quartet No. 16 in F Major, Op. 135: III. Lento assai, cantante tranquillo (Live at Konzerthaus, Wien, 1989)
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Beethoven: String Quartet No. 16 in F Major, Op. 135: IV. Grave ma non troppo tratto - Allegro (Live at Konzerthaus, Wien, 1989)
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Beethoven: Streichquartette Nr. 12, Op. 127 & Nr. 16, Op. 135
String Quartet No.12 in E Flat, Op.127: I. Maestoso - Allegro
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String Quartet No.15 in A Minor, Op.132: I. Assai sostenuto - Allegro
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String Quartet No.12 in E Flat, Op.127: II. Adagio ma non troppo, molto cantabile
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String Quartet No.14 in C Sharp Minor, Op.131: I. Adagio ma non troppo e molto espressivo
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String Quartet No.15 in A Minor, Op.132: II. Allegro ma non tanto
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String Quartet No.12 in E Flat, Op.127: III. Scherzando vivace
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String Quartet No.14 in C Sharp Minor, Op.131: II. Allegro molto vivace
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String Quartet No.15 in A Minor, Op.132: III. Molto adagio
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String Quartet No.12 in E Flat, Op.127: IV. Finale
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String Quartet No.14 in C Sharp Minor, Op.131: III. Andante moderato
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String Quartet No.15 in A Minor, Op.132: IV. Alla marcia, assai vivace
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String Quartet No. 13 in B Flat Major, Op.130: I. Adagio ma non troppo - Allegro
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String Quartet No.14 in C Sharp Minor, Op.131: IV. Andante ma non troppo e molto cantabile
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String Quartet No.15 in A Minor, Op.132: V. Allegro appasionato
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String Quartet No. 13 in B Flat Major, Op.130: II. Presto
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String Quartet No.14 in C Sharp Minor, Op.131: V. Presto
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String Quartet No. 16 in F Major, Op.135: I. Allegretto
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String Quartet No. 13 in B Flat Major, Op.130: III. Andante con moto, ma non troppo
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String Quartet No.14 in C Sharp Minor, Op.131: VI. Adagio quasi un poco andante
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String Quartet No. 16 in F Major, Op.135: II. Vivace
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String Quartet No. 13 in B Flat Major, Op.130: IV. Alla danza tedesca (Allegro assai)
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String Quartet No.14 in C Sharp Minor, Op.131: VII. Allegro
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String Quartet No. 16 in F Major, Op.135: III. Lento assai e cantante tranquillo
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String Quartet No. 13 in B Flat Major, Op.130: V. Cavatina (Adagio molto espressivo)
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String Quartet No. 16 in F Major, Op.135: IV. Grave ma non troppo tratto - Allegro
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String Quartet No. 13 in B Flat Major, Op.130: VI. Finale (Allegro)
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Beethoven: The Late String Quartets (Live at Konzerthaus, Wien, 1989)
Piazzolla: 5 Tango Sensations: No. 3, Anxiety
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Beethoven: String Quartets, Op. 18 (Live, 1989)
Beethoven: String Quartet No. 1 in F Major, Op. 18 No. 1: I. Allegro con brio (Live at Konzerthaus, Wien, VI.1989)
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Beethoven: String Quartet No. 4 in C Minor, Op. 18 No. 4: I. Allegro ma non tanto (Live at Konzerthaus, Wien, VI.1989)
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Beethoven: String Quartet No. 1 in F Major, Op. 18 No. 1: II. Adagio affettuoso ed appassionato (Live at Konzerthaus, Wien, VI.1989)
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Beethoven: String Quartet No. 4 in C Minor, Op. 18 No. 4: II. Scherzo. Andante scherzoso quasi allegretto (Live at Konzerthaus, Wien, VI.1989)
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Beethoven: String Quartet No. 1 in F Major, Op. 18 No. 1: III. Scherzo. Allegro molto (Live at Konzerthaus, Wien, VI.1989)
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Beethoven: String Quartet No. 1 in F Major, Op. 18 No. 1: IV. Allegro (Live at Konzerthaus, Wien, VI.1989)
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Beethoven: String Quartet No. 4 in C Minor, Op. 18 No. 4: IV. Allegro (Live at Konzerthaus, Wien, VI.1989)
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Beethoven: String Quartet No. 2 in G Major, Op. 18 No. 2: I. Allegro (Live at Konzerthaus, Wien, VI.1989)
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Beethoven: String Quartet No. 5 in A Major, Op. 18 No. 5: I. Allegro (Live at Konzerthaus, Wien, VI.1989)
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Beethoven: String Quartet No. 2 in G Major, Op. 18 No. 2: II. Adagio cantabile - Allegro (Live at Konzerthaus, Wien, VI.1989)
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Beethoven: String Quartet No. 5 in A Major, Op. 18 No. 5: II. Menuetto (Live at Konzerthaus, Wien, VI.1989)
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Beethoven: String Quartet No. 2 in G Major, Op. 18 No. 2: III. Scherzo. Allegro (Live at Konzerthaus, Wien, VI.1989)
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Beethoven: String Quartet No. 5 in A Major, Op. 18 No. 5: III. Andante cantabile (Live at Konzerthaus, Wien, VI.1989)
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Beethoven: String Quartet No. 2 in G Major, Op. 18 No. 2: IV. Allegro molto quasi presto (Live at Konzerthaus, Wien, VI.1989)
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Beethoven: String Quartet No. 5 in A Major, Op. 18 No. 5: IV. Allegro (Live at Konzerthaus, Wien, VI.1989)
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Beethoven: String Quartet No. 3 in D Major, Op. 18 No. 3: I. Allegro (Live at Konzerthaus, Wien, VI.1989)
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Beethoven: String Quartet No. 6 in B-Flat Major, Op. 18 No. 6: I. Allegro con brio (Live at Konzerthaus, Wien, VI.1989)
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Beethoven: String Quartet No. 3 in D Major, Op. 18 No. 3: II. Andante con moto (Live at Konzerthaus, Wien, VI.1989)
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Beethoven: String Quartet No. 6 in B-Flat Major, Op. 18 No. 6: II. Adagio ma non troppo (Live at Konzerthaus, Wien, VI.1989)
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Beethoven: String Quartet No. 3 in D Major, Op. 18 No. 3: III. Allegro (Live at Konzerthaus, Wien, VI.1989)
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Beethoven: String Quartet No. 6 in B-Flat Major, Op. 18 No. 6: III. Scherzo. Allegro (Live at Konzerthaus, Wien, VI.1989)
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Beethoven: String Quartet No. 3 in D Major, Op. 18 No. 3: IV. Presto (Live at Konzerthaus, Wien, VI.1989)
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Beethoven: String Quartet No. 6 in B-Flat Major, Op. 18 No. 6: IV. La Malinconia. Adagio - Allegretto quasi allegro (Live at Konzerthaus, Wien, VI.1989)
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Haydn: String Quartets, Op. 33 No. 3 "The Bird", Op. 77 Nos. 1 & 2
Haydn: String Quartet in C Major, Op. 33 No. 3, Hob. III:39 "The Bird": I. Allegro moderato (Live at Wiener Konzerthaus, 1999)
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Haydn: String Quartet in C Major, Op. 33 No. 3, Hob. III:39 "The Bird": II. Scherzo. Allegretto - Trio (Live at Wiener Konzerthaus, 1999)
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Haydn: String Quartet in C Major, Op. 33 No. 3, Hob. III:39 "The Bird": III. Adagio (Live at Wiener Konzerthaus, 1999)
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Haydn: String Quartet in C Major, Op. 33 No. 3, Hob. III:39 "The Bird": IV. Finale. Rondo presto (Live at Wiener Konzerthaus, 1999)
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Haydn: String Quartet in G Major, Op. 77 No. 1, Hob. III:81: I. Allegro moderato
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Haydn: String Quartet in G Major, Op. 77 No. 1, Hob. III:81: II. Adagio
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Haydn: String Quartet in G Major, Op. 77 No. 1, Hob. III:81: III. Menuetto. Presto
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Haydn: String Quartet in G Major, Op. 77 No. 1, Hob. III:81: IV. Finale. Presto
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Haydn: String Quartet in F Major, Op. 77 No. 2, Hob. III:82: I. Allegro moderato
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Haydn: String Quartet in F Major, Op. 77 No. 2, Hob. III:82: II. Menuetto - Trio
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Haydn: String Quartet in F Major, Op. 77 No. 2, Hob. III:82: III. Andante
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Haydn: String Quartet in F Major, Op. 77 No. 2, Hob. III:82: IV. Finale. Vivace assai
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Mendelssohn: String Quartets, Op. 12 & Op. 13
Mendelssohn: String Quartet No. 1 in E-Flat Major, Op. 12, MWV R25: I. Adagio non troppo - Allegro non tardante
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Mendelssohn: String Quartet No. 1 in E-Flat Major, Op. 12, MWV R25: II. Canzonetta. Allegretto
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Mendelssohn: String Quartet No. 1 in E-Flat Major, Op. 12, MWV R25: III. Andante espressivo
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Mendelssohn: String Quartet No. 1 in E-Flat Major, Op. 12, MWV R25: IV. Molto allegro e vivace
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Dvořák: String Quartets, Op. 51 & 105 (Live at Wiener Konzerthaus, 1999)
Dvořák: String Quartet No. 10 in E-Flat Major, Op. 51, B. 92: II. Dumka. Andante con moto (Live at Wiener Konzerthaus, 1999)
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Ravel & Debussy: String Quartets & Stravinsky: 3 Pieces, Concertino & Double Canon
Debussy: String Quartet in G Minor, Op. 10, CD 91, L. 85: I. Animé et très décidé
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Debussy: String Quartet in G Minor, Op. 10, CD 91, L. 85: II. Assez vif et bien rythmé
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Debussy: String Quartet in G Minor, Op. 10, CD 91, L. 85: III. Andantino. Doucement expressif
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Debussy: String Quartet in G Minor, Op. 10, CD 91, L. 85: IV. Très modéré - Très mouvementé et avec passion
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Stravinsky: 3 Pieces for String Quartet: No. 1
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Stravinsky: 3 Pieces for String Quartet: No. 2
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Stravinsky: 3 Pieces for String Quartet: No. 3
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Mozart: String Quartets Nos 14-23, String Quintets Nos 3 & 4
Mozart: String Quartet No. 14 in G Major, Op. 10 No. 1, K. 387 "Spring": I. Allegro vivace assai
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Mozart: String Quartet No. 14 in G Major, Op. 10 No. 1, K. 387 "Spring": II. Minuetto. Allegro
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Mozart: String Quartet No. 14 in G Major, Op. 10 No. 1, K. 387 "Spring": III. Andante cantabile
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Mozart: String Quartet No. 14 in G Major, Op. 10 No. 1, K. 387 "Spring": IV. Molto allegro
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Mozart: String Quartet No. 15 in D Minor, Op. 10 No. 2, K. 421: I. Allegro moderato
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Mozart: String Quartet No. 15 in D Minor, Op. 10 No. 2, K. 421: II. Andante
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Mozart: String Quartet No. 18 in A Major, Op. 10 No. 5, K. 464: IV. Allegro
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Mozart: String Quartet No. 19 in C Major, Op. 10 No. 6, K. 465 "Dissonance": II. Andante cantabile
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Mozart: Klavierkonzert No. 12 & Klavierquartett No. 2
Haydn: String Quartets Op.76 Nos. 1, 5 & 6
Haydn: String Quartet in G Major, Op. 76 No. 1, Hob. III:75: I. Allegro con spirito
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Haydn: String Quartet in G Major, Op. 76 No. 1, Hob. III:75: II. Adagio sostenuto
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Haydn: String Quartet in G Major, Op. 76 No. 1, Hob. III:75: III. Menuetto. Presto
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Haydn: String Quartet in G Major, Op. 76 No. 1, Hob. III:75: IV. Finale. Allegro ma non troppo
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Haydn: String Quartet in D Major, Op. 76 No. 5, Hob. III:79: I. Allegretto
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Haydn: String Quartet in D Major, Op. 76 No. 5, Hob. III:79: II. Largo cantabile e mesto
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Haydn: String Quartet in D Major, Op. 76 No. 5, Hob. III:79: III. Menuetto. Allegro
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Haydn: String Quartet in D Major, Op. 76 No. 5, Hob. III:79: IV. Finale. Presto
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Haydn: String Quartet in E-Flat Major, Op. 76 No. 6, Hob. III:80: I. Allegretto
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Haydn: String Quartet in E-Flat Major, Op. 76 No. 6, Hob. III:80: II. Fantasia. Adagio
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Haydn: String Quartet in E-Flat Major, Op. 76 No. 6, Hob. III:80: III. Menuetto - Alternativo
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Haydn: String Quartet in E-Flat Major, Op. 76 No. 6, Hob. III:80: IV. Finale. Allegro spirituoso
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Brahms: Klarinettenquintett, Op. 115 & Streichquintett Nr. 2, Op. 111
Brahms: Clarinet Quintet in B Minor, Op. 115: I. Allegro
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Brahms: Clarinet Quintet in B Minor, Op. 115: II. Adagio
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Brahms: Clarinet Quintet in B Minor, Op. 115: III. Andantino
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Brahms: Clarinet Quintet in B Minor, Op. 115: IV. Con moto
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Brahms: String Quintet No. 2 in G Major, Op. 111: I. Allegro non troppo, ma con brio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c8248d095638b08677f25b26c0f9aac1fc64c271b688289f84ab745555ff54. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9802557 — a six-check JSON result.
Brahms: String Quintet No. 2 in G Major, Op. 111: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6109c21582466cf0977b7139123cfd526850951f15fbf5826d2944339c6b141. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9802558 — a six-check JSON result.
Brahms: String Quintet No. 2 in G Major, Op. 111: III. Un poco Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd9ef893cec5bbbb5f09f78996de80cb1f0623664855162b3949443f5afd59a. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9802559 — a six-check JSON result.
Brahms: String Quintet No. 2 in G Major, Op. 111: IV. Vivace ma non troppo presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166cc14ea1bf39aace69570658b4d33160dbfd12e3531b9266510b7e38d44245. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9802560 — a six-check JSON result.
Beethoven: String Quartet No.11/Schubert: String Quartet No.13
Schubert: Streichquartette Nos. 10 & 14 "Der Tod und das Mädchen"
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Schubert: String Quartet No. 14 in D Minor, D. 810 "Death and the Maiden": II. Andante con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d26663f7460d0fc8c46c73b7234fc944e7137bd6c6f1d8bf408e603bf58cbb. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9400245 — a six-check JSON result.
Schubert: String Quartet No. 14 in D Minor, D. 810 "Death and the Maiden": III. Scherzo. Allegro molto - Trio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417294a518bb118bb719f1359a709676787048cb85714651a3d20e264869fc97. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9400246 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90904f519c0c22a1fa85e1e20b7489c109ce6008890c0f1bc3c6b4a11af6fbce. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9400247 — a six-check JSON result.
Schubert: String Quartet No. 10 in E-Flat Major, Op. Posth. 125 No. 1, D. 87: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f64eff7ee465c9db1d42cb86d2456d5b4a4254420805d7d2e8dfdc3eb55d8e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9702092 — a six-check JSON result.
Schubert: String Quartet No. 10 in E-Flat Major, Op. Posth. 125 No. 1, D. 87: II. Scherzo. Prestissimo - Trio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e64b0d07626e02c9e8c73bbe1e688edecfaa6c167b9fa6720c494c85dc9425f. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9702093 — a six-check JSON result.
Schubert: String Quartet No. 10 in E-Flat Major, Op. Posth. 125 No. 1, D. 87: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20daadef65ab0a5900accf40ddbed2463176b0e41837dcbfccd1fa9f35755acc. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9702094 — a six-check JSON result.
Schubert: String Quartet No. 15 in G Major, Op. Posth. 161, D. 887: I. Allegro molto moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525a07da5d11f1361b778bf65b963840570d4f8a36c47fdf322b7c99dc1a505c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9702097 — a six-check JSON result.
Lutosławski: Streichquartett - Urbanner: Streichquartett No. 4 - Berio: Notturno
Beethoven: String Quartet No. 14 in C-Sharp Minor, Op. 131: I. Adagio ma non troppo e molto espressivo
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Beethoven: String Quartet No. 14 in C-Sharp Minor, Op. 131: II. Allegro molto vivace
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Beethoven: String Quartet No. 14 in C-Sharp Minor, Op. 131: III. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f023ab6e89fac3a00fadd6eeada291e60821b150fe6f74de9a752558db538e0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8300617 — a six-check JSON result.
Beethoven: String Quartet No. 14 in C-Sharp Minor, Op. 131: IV. Andante ma non troppo e molto cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b008de5837d3fc45a047eb3418c550e6e82e07b1628ac293001a5b1cab9421. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8300618 — a six-check JSON result.
Beethoven: String Quartet No. 14 in C-Sharp Minor, Op. 131: V. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305fd92ed64ed9e08c1165ed5e360ef60e9f7ef1af0d17bae6e835083e34df43. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8300619 — a six-check JSON result.
Beethoven: String Quartet No. 14 in C-Sharp Minor, Op. 131: VI. Adagio quasi un poco andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d9a55f469c8676d61f83c0f6976246380b3f91172c162d26bb6b50f6c3d71a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8300620 — a six-check JSON result.
Beethoven: String Quartet No. 14 in C-Sharp Minor, Op. 131: VII. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadccee2b1fc7e7538c8b7e9567ebb9c7f3a158bf262ab07b36834664f9aa692. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8300621 — a six-check JSON result.
Beethoven: String Quartet No. 15 in A Minor, Op. 132: I. Assai sostenuto - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e70aa0b1dff95a8dcdb7869c3906b9d5611217f7ccd088477af812353f6d7d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8300623 — a six-check JSON result.
Beethoven: String Quartet No. 15 in A Minor, Op. 132: II. Allegro ma non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210e4264ca50a1b689b99ef8cc1d465611c4fc83d4cd1926896ecc109a2b7d3b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8300624 — a six-check JSON result.
Beethoven: String Quartet No. 15 in A Minor, Op. 132: III. Molto adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9357d73e7668786b2eeeb0202cff07b4352122e193d78b92c4fdc9e603afe7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8300625 — a six-check JSON result.
Beethoven: String Quartet No. 15 in A Minor, Op. 132: IV. Alla marcia, assai vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b526591e1317c00e3c084bac2f7edcecef4141f861d7413781a68e0f6ab576e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8300626 — a six-check JSON result.
Beethoven: String Quartet No. 15 in A Minor, Op. 132: V. Finale. Allegro appassionato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78612d2ada627644f17f48166b4f02364707deaa396cdfbbe9cd0f630443a398. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8300627 — a six-check JSON result.
Haydn: String Quartet in D Minor, Op. 76 No. 2, Hob. III:76 "Fifths": I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f4e0ee44cfe742c33c0a4c57b45649eefd9b7f8be7908cdf82c919c0240a91. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9302007 — a six-check JSON result.
Haydn: String Quartet in D Minor, Op. 76 No. 2, Hob. III:76 "Fifths": II. Andante o più tosto allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5435dc7751c0fc2de2dfbd149e32250c704595ec48f56f3d6f0c12f9d3bfdb6c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9302008 — a six-check JSON result.
Haydn: String Quartet in D Minor, Op. 76 No. 2, Hob. III:76 "Fifths": III. Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec83ef8f50a5f1436f92739df4bc6a277eedabb22873a3c7d7b120fbef56ce0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9302009 — a six-check JSON result.
Haydn: String Quartet in D Minor, Op. 76 No. 2, Hob. III:76 "Fifths": IV. Finale. Vivace assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b6ff54737aff62e814c30c2d32fbc4e3fceb3b1b6da08b27780c45613cdeaf. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9302010 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042963ff69040ac49f83927925f8a07ad308a69972ce519c0d7b515c4cd59e6f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9401705 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde91b86d13c2e6e0327747dfc62f4999b83a6fd183820ea47bcee4588eb8ca2c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9401706 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f96d6bcdc34c904828c7e6192c37db455e765d9ddee6707d5d674b200bacbef. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9401707 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc243802a635b385f92f1d1809afce760d596340f07b3c0058ca480d79d0a0caa. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9401708 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2332898eca5e198eb514b68fc0b75db9689d9a74379499ab33886abfa0b86e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9401709 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d263805f216f9ead2d50a5facb3dd5add1db534354170ebef4798f73e573775. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9401710 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc379eb0176acd740775eeab20b3d78b42d5be7d81c1875d83f97eeaff4cd3849. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9401711 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3db4244426d4341c9a8624f5f23163e53ff7caaadd8d389a6e8ca440ae704d5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9401712 — a six-check JSON result.
Haydn: String Quartet in B-Flat Major, Op. 76 No. 4, Hob. III:78 "Sunrise": I. Allegro con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d91f9ce24c960d094325be67e98cf225c89b58942ae5032104848a5a6d8fa6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9401691 — a six-check JSON result.
Haydn: String Quartet in B-Flat Major, Op. 76 No. 4, Hob. III:78 "Sunrise": II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf0036ec2adaa08938f1af5483d58cece52bab7905b2cedcd9add0ae373e154. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9401692 — a six-check JSON result.
Haydn: String Quartet in B-Flat Major, Op. 76 No. 4, Hob. III:78 "Sunrise": III. Menuetto. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd103940c47fda0d0ae97080563a057748b93993fac6b16df6a6eeef15d158e2e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9401693 — a six-check JSON result.
Haydn: String Quartet in B-Flat Major, Op. 76 No. 4, Hob. III:78 "Sunrise": IV. Finale. Allegro ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e7efe1bf1f561eb1ce2ddcbe7948e5949bf8a32aeacaf2bb95183e8dbad838. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9401694 — a six-check JSON result.
Beethoven: String Quartets, Op. 95 "Serioso", 130 & 133
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6818a7b37787a7326a07f527c493d158f6a7dc433b123690898814f529058d4e. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1201021 — a six-check JSON result.
Haydn: String Quartets, Op. 77 - Berio: Notturno (Quartetto III)
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String Quartet No. 1 'after Tolstoy's 'The Kreutzer Sonata' ': I. Adagio - Con moto
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String Quartet No. 1 'after Tolstoy's 'The Kreutzer Sonata' ': II. Con moto
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String Quartet No. 1 'after Tolstoy's 'The Kreutzer Sonata' ': III. Con moto - Vivo - Andante
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String Quartet No. 1 'after Tolstoy's 'The Kreutzer Sonata' ': IV. Con moto
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Brahms: String Quartet No. 2 in A Minor, Op. 51 No. 2: I. Allegro non troppo
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Brahms: String Quartet No. 1 in C Minor, Op. 51 No. 1: II. Romanze. Poco adagio
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Brahms: String Quartet No. 2 in A Minor, Op. 51 No. 2: II. Andante moderato
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Brahms: String Quartet No. 1 in C Minor, Op. 51 No. 1: III. Allegretto molto moderato e comodo
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Brahms: String Quartet No. 2 in A Minor, Op. 51 No. 2: III. Quasi minuetto, moderato
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Brahms: String Quartet No. 1 in C Minor, Op. 51 No. 1: IV. Allegro
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Brahms: String Quartet No. 2 in A Minor, Op. 51 No. 2: IV. Finale. Allegro non assai
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Brahms: String Quartet No. 3 in B-Flat Major, Op. 67: I. Vivace
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Brahms: String Quartet No. 3 in B-Flat Major, Op. 67: II. Andante
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Brahms: String Quartet No. 3 in B-Flat Major, Op. 67: III. Agitato. Allegretto non troppo
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Brahms: String Quartet No. 3 in B-Flat Major, Op. 67: IV. Poco allegretto con variazioni
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Debussy & Ravel: String Quartets & Stravinsky: 3 Pieces, Concertino & Double Canon
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Stravinsky: Concertino for String Quartet
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Rihm & Schnittke: String Quartets No. 4 (Live at Vienna Konzerthaus, 1990)
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Beethoven: Complete String Quartets, Vol. 2 (Live at Vienna Konzerthaus, 1989)
Beethoven: String Quartet No. 15 in A Minor, Op. 132: III. Molto adagio (Live at Konzerthaus, Wien, 1989)
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Beethoven: Complete String Quartets, Vol. 1 (Live at Vienna Konzerthaus, 1989)
Beethoven: String Quartet No. 12 in E-Flat Major, Op. 127: I. Maestoso - Allegro (Live at Konzerthaus, Wien, 1989)
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