The Borodin Quartet is a string quartet that was founded in 1944 in the then Soviet Union. It is one of the world's longest-lasting string quartets, having marked its 70th-anniversary season in 2015.
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 0xac5dbc73d89cf55c569ce2f0a364647d117e071380d0a5f2fd59010f4d17dfb4. 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/d9e8e136-9544-4b0f-aba2-388f69b0c919.json and https://artists.proofprofile.net/proofs/artist/d9e8e136-9544-4b0f-aba2-388f69b0c919.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x1b5f48c5cb8e20bbc64550841c8b63b6af3c5fe5dc8ab8481e49f28d0c1f0181. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX761929801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96849baa8fbe4a181c95ad2b0f5abf5d4f3a31f46cd50cc2ef390530e0873393. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX761929802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6605598e59d444191275b62a9b9a84312acb56efc6f486c5ffcab3de8aea0c0. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX761929803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc5b4d9cd89d7cc5dff5a4f01fa200b6e5abd41fbb9160e8928bdb598564a05. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX761929804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a82654df7277b0e457b3d73b49fd5783a0c75de6868bf8f145d4a9db2a6d27a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX761929805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c8a6a0114b19207ef5390a26c67c93f16febe6d2d51b077d0e48f4f0ade881. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX761929806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa792cdae2b55b4bfda687bfda0caa60e84595e6a7cf23788b95c7590bdcf74b0. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX761929807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f0f819b691848a910b9744db25d2691301fdff1c6aad2432cb52b42217579d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX761929808.
Sviatoslav Richter plays Rakhmaninov & Prokofiev
Shostakovich - Quartet No.4 & Quartet No.8
String Quartet No. 1 in C Major, Op. 49: 1. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7355b33eb7d83b252867f91cb1eda1526ebef3f696f8836b4c59c9b5839b5174. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071500001.
String Quartet No. 1 in C Major, Op. 49: 2. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d06b20080c345577b824374e982cfc137c01124cfa06ee5be70c8ed737ebbc8. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071500002.
String Quartet No. 1 in C Major, Op. 49: 3. Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a071f91c32eb221c48772c5f7b145d379e9e27b908268a1205543cc8effeb2. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071500003.
String Quartet No. 1 in C Major, Op. 49: 4. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29e8644d5a8f9d210f9c22ec98c03a73c83389f5fe93e1b1a4dad075f76f165. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071500004.
String Quartet No. 2 in A Major, Op. 68: 1. Overture (Moderato con moto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a00271b2e5914d2344b74007a840a1fe490c007847d16e57d8f11c223d06c09. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA1800145.
String Quartet No. 2 in A Major, Op. 68: 2. Recitative & Romance (Adagio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7872926afb8d3bc6557d4f7ace96d5d251e1bb8929fd0981b133870bf029a1. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA1800146.
String Quartet No. 2 in A Major, Op. 68: 3. Valse (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1742322dbb416f4521904ddc909cedfd2fa5fd8318a13366db89bfaafa47e907. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA1800147.
String Quartet No. 2 in A Major, Op. 68: 4. Theme & Variations
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df5ba8e48005ee0cb15efcdc4efac5fbb04ecc5539b73332bedd48f5a98ff8f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA1800148.
String Quartet No. 3 in F Major, Op. 73: 1. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ffb6480f4944d21ee9a18c578235331a11ec4cbc379d906ba97af606f4f2b4f. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA1800149.
String Quartet No. 3 in F Major, Op. 73: 2. Moderato con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffccb5f5e8291851dd0805cd0f88f16aa19666c7e253df2e31dc1ab4b13a88a3. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA1800150.
String Quartet No. 3 in F Major, Op. 73: 3. Allegro non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a45d20e328667ede76c47da0db42bc1a5f02cb011c834b4bc611fe72d9fd9a. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA1800151.
String Quartet No. 3 in F Major, Op. 73: 4. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef95e64594f9ba092e40b21898a613dd7d4ae5b4d3b28441d15f75d5a959c65. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA1800152.
String Quartet No. 3 in F Major, Op. 73: 5. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703303dad94c4790f5d69cb6b741a2163b8856d4b7cc395ba899d0e2714155cc. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA1800153.
String Quartet No. 4 in D Major, Op. 83: 1. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6985eae15bb80256a830011fac76c19e78a0171b583c90d7ffeba8858a6d979. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA1800154.
String Quartet No. 4 in D Major, Op. 83: 2. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c066e1f6d7e4be08e818dde7889d91702d7e61ae63dc0ba280cdad6aa847692. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA1800155.
String Quartet No. 4 in D Major, Op. 83: 3. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d619ee1f6ef93c4a257941bf297a2009505aacaa430f820fd02d30eb8a1649. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA1800156.
String Quartet No. 4 in D Major, Op. 83: 4. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286a20286e527252518a2204bcbfe59d4a3da802681608b7e8750291458e43fa. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA1800157.
String Quartet No. 5 in B-Flat Major, Op. 92: 1. Allegro non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981091c991e8815cbe1dfba2b9a2b3e748454d8ec0490079ab6f85486ebd9e6b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA1800158.
String Quartet No. 5 in B-Flat Major, Op. 92: 2. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8e2d0ad88bc06db1dd4076542f8d93259b98427c53dc46ff041555094f5e3a. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA1800159.
String Quartet No. 5 in B-Flat Major, Op. 92: 3. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac59d340869063aa62ad7fefa8163e395829e3fe9cefbc83d26631cbb77f9c04. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA1800160.
String Quartet No. 6 in G Major, Op. 101: 1. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2234fd9d4283aa8e04fe9fc8ac7eef7ecac120c498de1d91618efee549d2b5. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA1800161.
String Quartet No. 6 in G Major, Op. 101: 2. Moderato con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7be90fe8aa705885c6953b1b1d44d4a20acc11c3defd34ab42e78c7cc83d35. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA1800162.
String Quartet No. 6 in G Major, Op. 101: 3. Lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61253dc3271d358005bc227331cb29e72e86724b054b1ef85dac6818eba124ea. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA1800163.
String Quartet No. 6 in G Major, Op. 101: 4. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf07a45ddfa31d92fa57327621876d51b5be828f6c88fc49f4178239d76001f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA1800164.
String Quartet No. 7 in F-Sharp Minor, Op. 108: 1. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60191200b8349e27bdf11c30b73e25d456ad63a92564a1f51ceb43029b0c46a2. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA1800165.
String Quartet No. 7 in F-Sharp Minor, Op. 108: 2. Lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8b4e3ee61a7c6632a4520786d73bc750ce8b198bc595302914122710297cae. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA1800166.
String Quartet No. 7 in F-Sharp Minor, Op. 108: 3. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf7457cdde22ff025ca7646e5ad90a1fd8eadada4dc425142d2ea4607010d99. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA1800167.
String Quartet No. 8 in C Minor, Op. 110: 1. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17da179a33d1aabb6cde9da8970d0b1d7c756f4edb7e97c79d3ab29acd1468a1. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071500011.
String Quartet No. 8 in C Minor, Op. 110: 2. Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f9796306315c8206d73e234019d60228a81a44a13c74c981b99dab7340d7c5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071500012.
String Quartet No. 8 in C Minor, Op. 110: 3. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88eb30a317e0028735244b3779c0126ab13edb3b1f099decab62adce7ebca121. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071500013.
String Quartet No. 8 in C Minor, Op. 110: 4. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2280d97e95a660da03c6124f16c5148da14182eeaac496600264f47b0980cf5b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071500014.
String Quartet No. 8 in C Minor, Op. 110: 5. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a052609e462001e67c15d726a35d406db210aefc786885cde9e4eaba8f2f22. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071500015.
String Quartet No. 9 in E-Flat Major, Op. 117: 1. Moderato con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979e6d389afe7bed48a16bdd9be2c47a3809c07528503c1315c55cac36b4005a. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA1800168.
String Quartet No. 9 in E-Flat Major, Op. 117: 2. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9212f3719e473886f6f6f18e6ff83077211a676228c5ac3a2b970cf733965013. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA1800169.
String Quartet No. 9 in E-Flat Major, Op. 117: 3. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3581471bfe1612ad8b3a3673c76785347e696f4d85b0f83109da353319f3003e. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA1800170.
String Quartet No. 9 in E-Flat Major, Op. 117: 4. Adagio
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String Quartet No. 9 in E-Flat Major, Op. 117: 5. Allegro
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String Quartet No. 10 in A-Flat Major, Op. 118: 1. Andante con moto
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String Quartet No. 10 in A-Flat Major, Op. 118: 2. Allegretto furioso
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String Quartet No. 10 in A-Flat Major, Op. 118: 3. Adagio
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String Quartet No. 10 in A-Flat Major, Op. 118: 4. Allegretto - Andante
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String Quartet No. 11 in F Minor, Op. 122: 1. Introduction: Andantino
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String Quartet No. 11 in F Minor, Op. 122: 2. Scherzo: Allegretto
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String Quartet No. 11 in F Minor, Op. 122: 3. Recitative: Adagio
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String Quartet No. 11 in F Minor, Op. 122: 4. Etude: Allegro
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String Quartet No. 11 in F Minor, Op. 122: 5. Humoresque: Allegro
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String Quartet No. 11 in F Minor, Op. 122: 6. Elegy: Adagio
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String Quartet No. 11 in F Minor, Op. 122: 7. Finale: Moderato
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String Quartet No. 12 in D-Flat Major, Op. 133: 2. Allegretto - Adagio - Moderato - Allegretto
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Brahms, Shostakovich & Ravel: String Quartets (Live)
Igor Raykhelson: Piano & Chamber Music, Vol. 1
Brahms: Piano Quintet Op.34 & Franck: Piano Quintet
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Dmitri Shostakovich: String Quartets Nos. 4, 6 & 9
Tchaikovsky: The String Quartets & Souvenir de Florence
Tchaikovsky: Trio pour piano, violon et violoncelle & Quatuor à cordes No. 3 (Les indispensables de Diapason)
Dmitri Shostakovich: String Quartets Nos. 1, 2 & 5
Haydn: Die 7 letzten Worte unseres Erlosers am Kreuze (The 7 Last Words of Christ)
String Quartet No. 8 in C Minor, Op. 110
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Tchaikovsky: String Quartet No. 2; Souvenir de Florence
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Borodin Quartet Play Haydn & Mozart Favorites
String Quartet in D Major, Op. 64 No. 5 "Lark"
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String Quartet No. 15 in D Minor, K421/417b
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Beethoven, Liszt & Schumann: Piano Works
Schubert: Trout Quintet; Sonata Arpeggione; Quartettsatz
Piano Quintet in A Major "The Trout" D667
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Shostakovich: String Quartets Nos. 1, 8 & 14
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String Quartet No. 14 in F-Sharp Major, Op. 142: 1. Allegretto
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String Quartet No. 14 in F-Sharp Major, Op. 142: 2. Adagio
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String Quartet No. 14 in F-Sharp Major, Op. 142: 3. Allegretto
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Two Pieces for String Quartet, Op. 36a: 1. Elegy
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Two Pieces for String Quartet, Op. 36a: 2. Polka
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Beethoven / Shostakovich: Streichquartette
String Quartet in B-Flat Major: Adagio misterioso - Allegro con moto
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Beethoven: String Quartets, Op. 95 "Quartetto serioso" & 132
Beethoven: String Quartet No. 11 in F Minor, Op. 95 "Quartetto serioso": I. Allegro con brio
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String Quartet in B Minor, Op. 33, No. 1: I. Allegro moderato
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String Quartet in B Flat, Op. 33, No. 4: I. Allegro moderato
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String Quartet in B Minor, Op. 33, No. 1: II. Scherzo. Allegro di molto
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String Quartet in B Flat, Op. 33, No. 4: II. Scherzo. Allegretto
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String Quartet in B Minor, Op. 33, No. 1: III. Andante
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String Quartet in B Flat, Op. 33, No. 4: III. Largo
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String Quartet in B Minor, Op. 33, No. 1: IV. Finale. Presto
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String Quartet in E Flat, Op. 33, No. 2, "The Joke": I. Allegro moderato
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String Quartet in E Flat, Op. 33, No. 2, "The Joke": II. Scherzo. Allegro
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String Quartet in E Flat, Op. 33, No. 2, "The Joke": III. Largo
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String Quartet in E Flat, Op. 33, No. 2, "The Joke": IV. Presto
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String Quartet in C, Op. 33, No. 3, "The Bird": I. Allegro moderato
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String Quartet in C, Op. 33, No. 3, "The Bird": II. Scherzo. Allegretto
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String Quartet in C, Op. 33, No. 3, "The Bird": IV. Finale. Rondo - Presto
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Borodin Quartet perform Borodin, Stravinsky & Myaskovsky
Richter Archives, Vol. 16: Poulenc & Reger
String Quartet No. 1 in C Major, Op. 49: I. Moderato
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String Quartet No. 8 in C Minor, Op. 110: I. Largo
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String Quartet No. 8 in C Minor, Op. 110: II. Allegro molto
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Borodin Quartet Performs Chamber Music, Vol. 2
Borodin - String Quartet No.2 in D major: I. Allegro moderato
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Borodin - String Quartet No.2 in D major: Scherzo: Allegro
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Borodin - String Quartet No.2 in D major: Notturno: Andante
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Borodin - String Quartet No.2 in D major: Finale: Andante-Vivace
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Tchaikovsky - String Quartet No.1 in D major, Op.11: Andante cantabile
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Rachmaninov - String Quartet No.1: Romance
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Schubert - String Quartet No.12 in C minor, D703: Quartettsatz
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Weinberg: String Quartet No. 8 & Piano Quintet, Op. 18
Borodin Quartet Performs Russian Chamber Music
Borodin Quartet Performs Chamber Music of the 20th Century
Beethoven: String Quartets, Vol. 2: String Quartets Nos. 8 and 10
String Quartet No. 2 in D Major: III. Notturno. Andante
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