The Belcea Quartet is a string quartet, formed in 1994, under the leadership of violinist Corina Belcea. History The quartet was formed while its members were studying at the Royal College of Music i
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 0xa978b74635677f7247eb10d8129b645a815060990c880bf169637a63eaa00cf0. 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/165350b9-789c-4d27-b3f7-f0e44fcf1705.json and https://artists.proofprofile.net/proofs/artist/165350b9-789c-4d27-b3f7-f0e44fcf1705.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
String Quartet No. 1 "Kreutzer Sonata": I. Adagio con moto
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 0xc25e1d41e75d739bf9edfa2410ab04449a4fb6f6f4f2877c4b57ade347fa9c4c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X1845401.
String Quartet No. 1 "Kreutzer Sonata": II. Con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4e55288cb95881682075d238f05fd157cd789058738ffea8eab68045a18819. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X1845402.
String Quartet No. 1 "Kreutzer Sonata": III. Con moto - Vivace - Andante - Tempo I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5891974105d3c82bb3780794fcdc0146980cb4c01fb69f667cb57cd85fc2ba2e. 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/FR50X1845403.
String Quartet No. 1 "Kreutzer Sonata": IV. Con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03315339909b06d347a431e7e0210436b66f7f369fdedda51b896e1f8f7456b4. 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/FR50X1845404.
String Quartet No. 2 "Intimate Letters": I. Andante - Con moto - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6973466d84be7c0bab4be0c9d9923ce9dbcc2774bc7e3f22a34adccc4c9a848. 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/FR50X1845405.
String Quartet No. 2 "Intimate Letters": II. Adagio - Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb107eafe20b49133ea97d1cb46e14874546239a5870b444913fc46b3ae34a1f2. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FR50X1845406.
Shostakovich: String Quartet No. 3 & Piano Quintet
Piano Quintet in G Minor, Op. 57: I. Prelude (Lento)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a97d9c19cec8402e2bc9802ca36c42dc8f94b1d1f44ef6b909fa527ec798ecb. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/FR50X1736001.
Piano Quintet in G Minor, Op. 57: II. Fugue (Adagio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa950af422df9f576b1a1d84700c2c3ddeacfac04396a013e78adee39a3266003. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X1736002.
Piano Quintet in G Minor, Op. 57: III. Scherzo (Allegretto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f4823b4b1c31aac1f6db7bedb8cf6809e5448eb7f871acb80b16279673c7ee. 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/FR50X1736003.
Piano Quintet in G Minor, Op. 57: IV. Intermezzo (Lento)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952727445e058cc094fa530fddf136557e1116dfd3e98d81078867a2ec2a645b. 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/FR50X1736004.
Piano Quintet in G Minor, Op. 57: V. Finale (Allegretto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289f1e518639eb59988f70013f83d3bba88fa06e4aaf5730173a44d9d48548a2. 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/FR50X1736005.
String Quartet No. 3 in F Major, Op. 73: I. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98dd5d321cf9793a96c8dd45ef83158aa62bf3701cede70e99a84db99c5ad619. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FR50X1736006.
String Quartet No. 3 in F Major, Op. 73: II. Moderato con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28cce8a6da29286a0f5fce92746ffdf5dc374424cecab9b8e1f25d21627c3ce. 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/FR50X1736007.
String Quartet No. 3 in F Major, Op. 73: III. Allegro non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b368c9964e6961c1aeb13cd2ff49d7512e71eccdf4fdd3d90e537384b289c0. 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/FR50X1736008.
String Quartet No. 3 in F Major, Op. 73: IV. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c9a27c9c480d28ed9c70598014bfdbad2b65a22de2d4abe37507c57b5ebe83. 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/FR50X1736009.
String Quartet No. 3 in F Major, Op. 73: V. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234d3fbf1fba8d2202ffd6e36e6979e111e3ec6f8f3475bfdf6696ab35cdd4fc. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X1736010.
String Sextet No. 1, Op. 18: I. Allegro ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603eb443f3105d2e8c980bc9e45e8938abd032dd8d9378fa61e8b34722fd26c0. 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/FR50X2179201.
String Sextet No. 1, Op. 18: II. Andante ma moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0912ddd0c9262433864936132729dc2cf4637ccb9b2e8f1257b84e0f7519127e. 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/FR50X2179202.
String Sextet No. 1, Op. 18: III. Scherzo. Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1ff463bda23e90de798c739b81d2430d6ef56652079d2e7cb87af741d3d35a. 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/FR50X2179203.
String Sextet No. 1, Op. 18: IV. Rondo. Poco allegretto e grazioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b88c8e0f816c2974ae971eebf64013f3ec36a028a9276b1373d154985152ae. 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/FR50X2179204.
String Sextet No. 2, Op. 36: I. Allegro non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10b9cc33d4ebf9743fadbb366d215cc2962b6b9689b30cf4a36fd2b17479158. 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/FR50X2179205.
String Sextet No. 2, Op. 36: II. Scherzo. Allegro non troppo — Presto giocoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c65c29f1e2a04a0fb4ab81522d9c10aebdf102ffcf1ba71fd8ce13fb4b3c102. 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/FR50X2179206.
String Sextet No. 2, Op. 36: III. Poco adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92053a8a92da922728fd071f7a260e8c4dd2ecd1534d48073ad077569c93201. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/FR50X2179207.
String Sextet No. 2, Op. 36: IV. Poco allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b052f33ab10a9e33ff3ee14f08b42a0fd639793364403b228375055c6a6aeeb. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X2179208.
String Quartet No. 1 in C Minor, Op. 51: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f74e1f247c71be20d121e05c5bcad36597b794f62bcb81b67659fae50f17793. Chain 2 (Bitcoin): anchored in block 960101 (2026-07-29T11:46:30Z), 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/FR50X1524801.
String Quartet No. 3 in B-Flat Major, Op. 67: I. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81479456ec284b0928ad7e31a4fd30a01df4be4325047ff013333c8d4f342727. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/FR50X1524809.
String Quartet No. 1 in C Minor, Op. 51: II. Romanze (Poco adagio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c4da91eaa967388dd4a09d26dbd5c878559a13e4595f6ba7a979f3f23bff15. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR50X1524802.
String Quartet No. 3 in B-Flat Major, Op. 67: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d0a96a3700041289cd0cba030554c130bbd3339d9081a58aee4db3dac84e30. 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/FR50X1524810.
String Quartet No. 1 in C Minor, Op. 51: III. Allegretto molto moderato e comodo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef528b163ecabdc389b952c80edda460564a11546cebae838d8bb81696b87a2. 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/FR50X1524803.
String Quartet No. 3 in B-Flat Major, Op. 67: III. Agitato (Allegretto non troppo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d16be2748e01ae09cf7df1a7795f2c5d41e62742bec7dc77f61851aa720bde2. 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/FR50X1524811.
String Quartet No. 1 in C Minor, Op. 51: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47216ff5e34812264aa3f8c8dc83f094bb8c1439be2f44d74f043a1cbcd5cdac. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/FR50X1524804.
String Quartet No. 3 in B-Flat Major, Op. 67: IV. Poco allegretto con variazioni
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e0813511031d5c1521bc98e1152ff100b935b1c0daa5fa4f1543b193514816. 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/FR50X1524812.
String Quartet No. 2 in A Minor, Op. 51: I. Allegro non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f67a4c62c2c0cd07a907229a8bbb58dec0fd526b12f4dae370b08c8dc585d1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR50X1524805.
Piano Quintet in F Minor, Op. 34: I. Allegro non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c3ab18329d175f57782b3600e1e3ba0e06db3175bc4deffad80290556f1feb. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X1524813.
String Quartet No. 2 in A Minor, Op. 51: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d59ece39811d37c71445f3233dfcd4640834bf5fa48bc01afd885cf9b98e445. 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/FR50X1524806.
Piano Quintet in F Minor, Op. 34: II. Andante, un poco adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8e7d41d36dcc660bc4857897c295043b3095cc160661ab585afdac3159ee7b. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FR50X1524814.
String Quartet No. 2 in A Minor, Op. 51: III. Quasi minuetto, moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6dec203325bb6f9787ef9f42a462f204abe52bb55978150005b52dd9fe3c6de. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FR50X1524807.
Piano Quintet in F Minor, Op. 34: III. Scherzo (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426b88587cc40429fb706b46c4102918fd29cf401e409c83d849ff455052ecce. 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/FR50X1524815.
String Quartet No. 2 in A Minor, Op. 51: IV. Finale (Allegro non assai)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890c51b2801f2567db38943affa03c8ac86b4e818a4222146368f77c0c9a5be8. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FR50X1524808.
Piano Quintet in F Minor, Op. 34: IV. Finale (Poco sostenuto - Allegro non troppo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3affb726ba133cd32a9f3443fd48b32c92fd1a8dda73e97053dc67763af2cdb. 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/FR50X1524816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc0f4ee20a8441cb360297a1e3bb5c54be74b03b0564cdf8301353ac07dfcf0. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/FR50X1420901.
Beethoven: The Complete String Quartets, Vol. 2
String Quartet No. 3 in D Major, Op. 18 No. 3: I. Allegro
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String Quartet No. 7 in F Major, Op. 59 No. 1 "Razumovsky": I. Allegro
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String Quartet No. 15 in A Minor, Op. 132: I. Allegro sostenuto - Allegro
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String Quartet No. 7 in F Major, Op. 59 No. 1 "Razumovsky": III. Adagio molto e mesto
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String Quartet No. 15 in A Minor, Op. 132: III. Molto adagio
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String Quartet No. 13 in B-Flat Major, Op. 130: II. Presto
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Grosse Fuge for String Quartet in B-Flat Major, Op. 133
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String Quartet No. 13 in B-Flat Major, Op. 130: V. Cavatina, adagio molto espressivo
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Beethoven: The Complete String Quartets, Vol. 1
String Quartet No. 6 in B-Flat Major, Op. 18 No. 6: I. Allegro con brio
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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. 12 in E-Flat Major, Op. 127: I. Maestoso - Allegro
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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. 14 in C-Sharp Minor, Op. 131: VII. Allegro
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String Quartet No. 2 in G Major, Op. 18 No. 2: I. Allegro
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String Quartet No. 11 in F Minor, Op. 95: I. Allegro con brio
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String Quartet No. 6 in B-Flat Major, Op. 18 No. 6: II. Adagio, ma non troppo
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String Quartet No. 1 in F Major, Op. 18 No. 1: II. Adagio affettuoso ed appassionato
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String Quartet No. 6 in B-Flat Major, Op. 18 No. 6: IV. La malinconia. Adagio
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String Quartet No. 12 in E-Flat Major, Op. 127: II. Adagio, ma non troppo e molto cantabile
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String Quartet No. 12 in E-Flat Major, Op. 127: III. Scherzando vivace
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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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Schubert: String Quintet, String Quartets No. 15 & No. 14 "Death and the Maiden"
Schubert: String Quintet in C Major, Op. 163, D. 956: I. Allegro ma non troppo
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Schubert: String Quintet in C Major, Op. 163, D. 956: II. Adagio
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Schubert: String Quartet No. 14 in D Minor, D. 810 "Death and the Maiden": I. Allegro
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Schubert: String Quartet No. 14 in D Minor, D. 810 "Death and the Maiden": II. Andante con moto
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Brahms: String Quartet No. 1, Op. 51 No. 1 & String Quintet No. 2, Op. 111
Bartók: String Quartet No. 1 in A Minor, Op. 7, Sz. 40: I. Lento
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Bartók: String Quartet No. 2 in A Minor, Op. 17, Sz. 67: I. Moderato
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Bartók: String Quartet No. 1 in A Minor, Op. 7, Sz. 40: II. Allegretto
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Bartók: String Quartet No. 2 in A Minor, Op. 17, Sz. 67: II. Allegro molto capriccioso
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Bartók: String Quartet No. 1 in A Minor, Op. 7, Sz. 40: III. Allegro vivace
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Bartók: String Quartet No. 2 in A Minor, Op. 17, Sz. 67: III. Lento
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Bartók: String Quartet No. 3 in C-Sharp Minor, Sz. 85: I. Prima parte. Moderato
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Bartók: String Quartet No. 4 in C Major, Sz. 91: I. Allegro
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Bartók: String Quartet No. 3 in C-Sharp Minor, Sz. 85: II. Seconda parte. Allegro
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Bartók: String Quartet No. 4 in C Major, Sz. 91: II. Prestissimo, con sordino
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Bartók: String Quartet No. 3 in C-Sharp Minor, Sz. 85: III. Ricapitulazione della prima parte. Moderato & IV. Coda. Allegro molto
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Bartók: String Quartet No. 4 in C Major, Sz. 91: III. Non troppo lento
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Bartók: String Quartet No. 5 in B-Flat Major, Sz. 102: I. Allegro
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Bartók: String Quartet No. 4 in C Major, Sz. 91: IV. Allegretto pizzicato
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Bartók: String Quartet No. 5 in B-Flat Major, Sz. 102: II. Adagio molto
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Bartók: String Quartet No. 4 in C Major, Sz. 91: V. Allegro molto
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Bartók: String Quartet No. 5 in B-Flat Major, Sz. 102: III. Scherzo. Alla bulgarese - Trio
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Bartók: String Quartet No. 6 in D Major, Sz. 114: I. Mesto - Vivace
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Bartók: String Quartet No. 5 in B-Flat Major, Sz. 102: IV. Andante
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Bartók: String Quartet No. 6 in D Major, Sz. 114: II. Mesto - Marcia
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Bartók: String Quartet No. 5 in B-Flat Major, Sz. 102: V. Finale. Allegro vivace - Presto
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Bartók: String Quartet No. 6 in D Major, Sz. 114: III. Mesto - Burletta. Moderato
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Bartók: String Quartet No. 6 in D Major, Sz. 114: IV. Mesto
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Mozart: String Quartets, K. 465 "Dissonance" & K. 499 "Hoffmeister"
Britten: String Quartets Nos. 1 - 3 & Divertimenti
Britten: String Quartet No. 1 in D Major, Op. 25: I. Andante sostenuto - Allegro vivo
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Britten: String Quartet No. 1 in D Major, Op. 25: II. Allegro con slancio
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Britten: String Quartet No. 1 in D Major, Op. 25: III. Andante calmo
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Britten: String Quartet No. 1 in D Major, Op. 25: IV. Molto vivace
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Britten: String Quartet No. 2 in C Major, Op. 36: I. Allegro calmo senza rigore
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Britten: String Quartet No. 2 in C Major, Op. 36: II. Vivace
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Britten: String Quartet No. 2 in C Major, Op. 36: III. Chacony
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Schubert: String Quartets D. 804 "Rosamunde", D. 703 "Quartettsatz" & D. 87
Schubert: String Quartet No. 13 in A Minor, Op. 29, D. 804 "Rosamunde": I. Allegro ma non troppo
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Schubert: String Quartet No. 13 in A Minor, Op. 29, D. 804 "Rosamunde": II. Andante
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Schubert: String Quartet No. 12 in C Minor, D. 703 "Quartettsatz"
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Debussy, Dutilleux & Ravel: String Quartets
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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Dutilleux: Ainsi la nuit: Libre et souple
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Dutilleux: Ainsi la nuit: II. Miroir d'espace
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Dutilleux: Ainsi la nuit: IV. Litanies 2
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Dutilleux: Ainsi la nuit: V. Constellations
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Dutilleux: Ainsi la nuit: VI. Nocturne 2
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Dutilleux: Ainsi la nuit: VII. Temps suspendu
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Ravel: String Quartet, M. 35: I. Allegro moderato - Très doux
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Ravel: String Quartet, M. 35: II. Assez vif - Très rythmé
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Ravel: String Quartet, M. 35: III. Très lent
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Ravel: String Quartet, M. 35: IV. Vif et agité
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Debussy: Clair de lune and Other Masterpieces
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