The Quatuor Mosaïques is an Austrian string quartet, founded in 1987 by Erich Höbarth, Andrea Bischof, Anita Mitterer, and Christophe Coin, four members of the Concentus Musicus Wien who play on histo
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 0x6b325fcf59c44ca5b927b3cd43de57cb88f32686ca1f8cbf71005d9ead7bcfdc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55b8432f-ffb5-496b-a43a-1b62fcbb7c5c.json and https://artists.proofprofile.net/proofs/artist/55b8432f-ffb5-496b-a43a-1b62fcbb7c5c.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Lamento della ninfa, SV 163: No. 3, Amor
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 0x8fdfa624b83e86650d62638ada0a4b0382ae5e1413f1d987463c9df059974798. 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/FRZ130700350 — a six-check JSON result.
24 Prelude, Op. 28: No 4, Largo in E Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f460e939b0e51cdf0f85fb5bd499ccd383cdd3fc9b1c510af80f0ee71d50977. 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/FRZ130948190 — a six-check JSON result.
Piano Concerto No. 21 in C Major, K. 467: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecce2fdf815b54f074be75afdd38a9506fe6dd001d02a924ed6c0eff80a6a7e2. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ130948070 — a six-check JSON result.
Don Juan, Wq. 52: No. 31, Danza degli spettri a delle furie. Allegro non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02334763f2d9789d1005643907ce4d8ed1def63b201ed8abd44c7afadb0622f8. 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/FRZ130948050 — a six-check JSON result.
Adagio for Strings, Op. 11 - Arr. as Agnus Dei by Laurence Equilbey
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3baa1211c4af6e913f18d17fc285672953c6e66150548600a9b1564c8794e050. 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/FRZ130110430 — a six-check JSON result.
Die Zauberflöte, K. 620, Act II, Scene 18: No 17, Ach, ich fühls, es ist verschwunden (Pamina's Aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543b65984e9a4ad88f14839c4f09f688d13bd2fef6827431bab9910f23d5f2aa. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ130948030 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798c8e371d6c1e8acb3e749f77fbe5c4e49f7d807feb8e826ea9f7b8a51ab58a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR47Q0901920 — a six-check JSON result.
Elégie in C Minor for Cello and Orchestra, Op. 24
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7960e71f01cccc48c5575b632648d88cc401fafddb8edd26ad7a698822becf9. 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/FRZ130948020 — a six-check JSON result.
Les valseuses - After Bertrand Blier's Film
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5887613c5973ba0c10002f61213b5d22e085166d8bf43e1fa01f0cea05e18aec. 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/FRZ130948120 — a six-check JSON result.
6 Romances, Op. 16: No 1, Cradle Song. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40de8572103f855f08b85945aac33927d524504787eb2de8d4a877b34652138. 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/FRZ130947090 — a six-check JSON result.
Concerto for Violin and Orchestra: II. —
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679f355d07be95d165780182340dd12db03a27da2385a86e760baa9adadee7b7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ130948230 — a six-check JSON result.
Adagio for Strings, Op. 11 - Agnus Dei, Choral Version in B-Flat Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71ad0cef6f64ccb4c012575dff8e5a97b178b71abc1d70ddbeb40df3721ac75. 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/FRZ130948010 — a six-check JSON result.
Nisi Dominus in G Minor, RV 608: No 4, Cum dederit (Aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6efea40c2f16a761b4d50b8b9857ef125a529025c15b9e410c43b35adb96d0. 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/FRZ130948060 — a six-check JSON result.
Matthäus-Passion, BWV 244, Pt. II: No. 39, Erbarme dich mein Gott (Aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc7899f7191a9427da3a84675aa25571cb187c83311a425c2a1ca03d8b5baa3. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ130948150 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb590613f970d46d9cfb1f803f784437c8a7abe931b24bcc76f3bae7f3401b35b. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/FR47Q0901910 — a six-check JSON result.
Symphony No. 5: IV. Adagietto - Arr. for Solists and Chorus by Gérard Pesson
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafbd7e54823be98339ca327ab4c110d5969e5fb274bb04b5b4ca81fa316aa12. 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/FRZ130948210 — a six-check JSON result.
King Arthur, Z. 628: What Power Art Thou (Aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeece9b49348ae92e89add888c552e2ae43c740631c2dc78b441b0ded2f757bc6. 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/FRZ130948040 — a six-check JSON result.
Beethoven: The Late Quartets, Op. 127 - 135
String Quartet No. 12 in E-Flat Major, Op. 127: I. Maestoso - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521a8ea205aae53416c29294adf99391547e1392f358c4887061e6f6d82a9d3b. 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/FRZ131711010 — a six-check JSON result.
String Quartet No. 13 in B-Flat Major, Op. 130: I. Adagio ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf2990241bfbb2b2dd6e5544e14ce06d47bc3d553dd9208c57fd595f1a94cad. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ131711120 — a six-check JSON result.
String Quartet No. 12 in E-Flat Major, Op. 127: II. Adagio, ma non troppo e molto cantabile - Andante con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13149a8bc421b21b416ac15c1d12cb13d18650d70e305c1e4e1d51fd8ef78f7. 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/FRZ131711020 — a six-check JSON result.
String Quartet No. 13 in B-Flat Major, Op. 130: II. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3244b84117d071fd977a997142132c7e6d7b3c94123582bcab7267b54be6c5. 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/FRZ131711130 — a six-check JSON result.
String Quartet No. 12 in E-Flat Major, Op. 127: III. Scherzando vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e17735c4bad8fc30c2841dd82e8432b6f72c57379455d2ddf9e0a6abdabaa72. 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/FRZ131711030 — a six-check JSON result.
String Quartet No. 15 in A Minor, Op. 132: III. Molto adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f708d1fbf89849e6cb156af39372b54058fd9ce41dcb3e83f85faf466852c9b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ131711200 — a six-check JSON result.
String Quartet No. 12 in E-Flat Major, Op. 127: IV. Finale. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474f0e1ef147e118d286043c96a81eb4c9d1e5ed66236ac9fef76e677832dae6. 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/FRZ131711040 — a six-check JSON result.
String Quartet No. 14 in C-Sharp Minor, Op. 131: I. Adagio ma non troppo e molto espressivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbae662cf0d0882781cb09744947dcca0a3163269faa340b8af34a53399597fc. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ131711050 — a six-check JSON result.
String Quartet No. 13 in B-Flat Major, Op. 130: V. Cavatina. Adagio molto espressivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e4573d800e442c578feaf84d74ebae9f7aa4418e94af545446e31c525ca401. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/FRZ131711160 — a six-check JSON result.
String Quartet No. 14 in C-Sharp Minor, Op. 131: II. Allegro molto vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701338e860f2ca0c46acf21c1687496a7f4c4f5017184be15b054e228d28869e. 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/FRZ131711060 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeede6f19ba05c85bc2d0c7f09d63df40605cbf4b5d0faf88602347ccbfeb63f1. 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/FRZ131711170 — a six-check JSON result.
String Quartet No. 14 in C-Sharp Minor, Op. 131: III. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054e93eed7efc75873ec375a467a60fbd21b9e87cf8453fb434815945a8d5ea4. 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/FRZ131711070 — a six-check JSON result.
String Quartet No. 16 in F Major, Op. 135: III. Lento assai, cantante e tranquillo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7388a4d000b7dd139377c8242bfe414ab4983c2501b304c309b52f1db7eb5450. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ131711250 — a six-check JSON result.
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 0x689244b527509a53d44fa797e1c42f5d0567992d431e48420ce1b890a26da948. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ131711080 — a six-check JSON result.
String Quartet No. 14 in C-Sharp Minor, Op. 131: V. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069b1a2a74f5e50a995aaefa112a2d5ae92bc1f170b9590f1afb8f8d2331b40f. 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/FRZ131711090 — a six-check JSON result.
String Quartet No. 14 in C-Sharp Minor, Op. 131: VI. Adagio quasi un poco andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853bddfde9bfcd3f23317dcc2a10d36ff14cdebcbe54505b8330512a56a67147. 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/FRZ131711100 — a six-check JSON result.
String Quartet No. 14 in C-Sharp Minor, Op. 131: VII. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03ec3e9b5564942a14f73c3c1556ad26c80eb1b085a14fcbd8a1ef6cb69b9d1. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FRZ131711110 — a six-check JSON result.
String Quartets, Op. 20, No. 1 in E-Flat Major, Hob. III:31: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a81f4b0e2107b95d2f44b2caf4bd7948857fcb5e44fa2733ed902c030bf11ac. 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/FRX201644652 — a six-check JSON result.
String Quartets, Op. 33, No. 5 in G Major, Hob. III:41 "The Russian Quartets": I. Vivace assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c28095a79468dd86af67e96104269a0641283909c6d55be34f57f79d99bdb1b. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/FRX201657546 — a six-check JSON result.
String Quartets, Op. 20, No. 1 in E-Flat Major, Hob. III:31: II. Menuetto. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f0eb8cbde894ad56f77aa486f75cbb8d7d1dad79ada5bd9518bb2d5d073ff6. 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/FRX201644653 — a six-check JSON result.
String Quartets, Op. 33, No. 5 in G Major, Hob. III:41 "The Russian Quartets": II. Largo e cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550e2f133adae7edb718ea3861644a116e99c19bb71216853fecbf6529f768c6. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/FRX201657547 — a six-check JSON result.
String Quartets, Op. 20, No. 1 in E-Flat Major, Hob. III:31: III. Affectuoso e sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac81bb10d3713e1b2ebbc234f4c0539eba271a42da51556b78916b30545218f1. 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/FRX201644654 — a six-check JSON result.
String Quartets, Op. 20, No. 1 in E-Flat Major, Hob. III:31: IV. Finale. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d732f3a14b0bd6d397af3ed899793733c34168a8be27d88ff6bc18cbf76c1d3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX201644655 — a six-check JSON result.
String Quartets, Op. 33, No. 5 in G Major, Hob. III:41 "The Russian Quartets": IV. Finale. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3b109d0303bc072a9041c96a6a97a2877680feb12b4f0a13fd6247cd6989de. 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/FRX201657549 — a six-check JSON result.
String Quartets, Op. 20, No. 5 in F Minor, Hob. III:35: II. Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed31c89f8af89a39e6793a12b483157cb1fd4d4c9447aedaf1a7eab7b34ea93e. 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/FRX201644657 — a six-check JSON result.
String Quartets, Op. 20, No. 5 in F Minor, Hob. III:35: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd751f146811d1a8c024bc84935dd47c4ae1b66bc09351d7f72829ee0bf68405a. 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/FRX201644658 — a six-check JSON result.
String Quartet No. 14 in G Major, Op. X No. 1, K. 387 "Spring Quartet": I. Allegro vivace assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26bb08fa135ef8c5c04d928661728f8554f539b807014051eead1299830d8082. 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/FR10S1706472 — a six-check JSON result.
String Quartet No. 17 in B-Flat Major, Op. X No. 3, K. 458: I. Allegro vivace assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e6dfa7680c54799045d2db07ab2d59556c331c8ba3b7569e23b548497cc619. 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/FR10S1706480 — a six-check JSON result.
String Quartet No. 14 in G Major, Op. X No. 1, K. 387 "Spring Quartet": II. Menuetto. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaff7c53537d91bb781cb682b97266cfca00a6ad3f51f6a039e78e32b11b413b. 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/FR10S1706473 — a six-check JSON result.
String Quartet No. 14 in G Major, Op. X No. 1, K. 387 "Spring Quartet": III. Andante cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee548ac417ffcb2465a068ab9d924bd637eb13ad9c61155f7f8c0d7fa901cee2. 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/FR10S1706474 — a six-check JSON result.
String Quartet No. 17 in B-Flat Major, Op. X No. 3, K. 458: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd76b79b99122e3f36f7623fcfe7e1dc7e73de8d8791fccb0428469df985d15. 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/FR10S1706482 — a six-check JSON result.
String Quartet No. 14 in G Major, Op. X No. 1, K. 387 "Spring Quartet": IV. Molto allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f2977a436a4f52fd49397f736ad659443fd34da61bf319f3bfae23c0e2dbf0. 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/FR10S1706475 — a six-check JSON result.
String Quartet No. 15 in D Minor, Op. X No. 2, K. 421: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8445f30dbccc0f3827cd8f76b6b14749dc8cae2b9322d021d2f90e481f259db2. 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/FR10S1706476 — a six-check JSON result.
String Quartet No. 16 in E-Flat Major, Op. X No. 4, K. 428: I. Allegro non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aae0fd386ace9cca78f048d5d2d89d144b499967c54080fef37f577c8423a7e. 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/FR10S1706484 — a six-check JSON result.
String Quartet No. 15 in D Minor, Op. X No. 2, K. 421: III. Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc428234450daf0087904760fa245d73f2edd4d55880e2976456f4992a5d47dea. 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/FR10S1706478 — a six-check JSON result.
String Quartet No. 15 in D Minor, Op. X No. 2, K. 421: IV. Allegretto ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec27fac0f44a1555359ba8fb530a214cf582b4c732e32959a20951804b2f7d40. 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/FR10S1706479 — a six-check JSON result.
Joseph Wölfl: String Quartets, Op. 4 & Op. 10
Haydn, Beethoven, Mozart, Schubert & Mendelssohn: String Quartets
Beethoven: String Quartets Op. 18 Nos. 2 & 3
String Quartet No. 2 in F Major, Op. 18, No. 2: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878491c94ed3d2a70a556701e35dbd4ff005b0af357c030b3ea18d0ed5daccaa. 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/FRZ130500411 — a six-check JSON result.
String Quartet No. 2 in F Major, Op. 18, No. 2: II. Adagio Cantabile, Allegro, Tempo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f7c0517867e408527da2994a51c196404a5b907379d5f5af41ae3fa61150df. 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/FRZ130500412 — a six-check JSON result.
String Quartet No. 2 in F Major, Op. 18, No. 2: III. Scherzo, Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afa66a644b2306cc302f726617d6a6aacdc8227b9a3d05ab7bd664d6c90c3eb. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ130500413 — a six-check JSON result.
String Quartet No. 2 in F Major, Op. 18, No. 2: IV. Allegro Molto quasi Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3691b3aead33ea1d129991304dc0c48b3e66b2dfc65d9a86b6ce383a04ec7b31. 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/FRZ130500414 — a six-check JSON result.
String Quartet No. 3 in D Major, Op. 18, No. 3: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6e098bc57c119e9f566127dcb2452d77be812e7f5cb7548af0c60e644a65f4. 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/FRZ130500421 — a six-check JSON result.
String Quartet No. 3 in D Major, Op. 18, No. 3: II. Allegro con Moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c65708b888a69674203853707bd9334ecca0704b6714e01a48b399b8076b379. 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/FRZ130500422 — a six-check JSON result.
String Quartet No. 3 in D Major, Op. 18, No. 3: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbcfaddca567d0b0d8c89493ce740198609ff057717944ea62a02cad6fafe830. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ130500423 — a six-check JSON result.
String Quartet No. 3 in D Major, Op. 18, No. 3: IV. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791ce41c5f52629ad3f929f3fa3b962f121fa7329393bea76e0bf95162baf014. 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/FRZ130500424 — a six-check JSON result.
Beethoven: String Quartets Op.18, N°1 & 4
String Quartet No. 1 in F Major, Op. 18, No. 1: I. Allegro con Brio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8c141f08115687019bd1d01d92c1ac169d61e292a9d8bcf0b91819ab972cfb. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/FRZ130400561 — a six-check JSON result.
String Quartet No. 1 in F Major, Op. 18, No. 1: II. Adagio Affettuoso ed Appassionato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa72bdac0b5fa0486b21f3d2970dd79947bfc0157c388685d9040db9823c556b. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/FRZ130400562 — a six-check JSON result.
String Quartet No. 1 in F Major, Op. 18, No. 1: III. Scherzo, Allegro Molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3143947f0542e72c2ca8ee226e74695453b489839fdc8a42d915f5156e6cfc. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ130400563 — a six-check JSON result.
String Quartet No. 1 in F Major, Op. 18, No. 1: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f09548690e6fb7af1e9119034f41589f7542dcd14989406ecfbb7782f4b145a. 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/FRZ130400564 — a six-check JSON result.
String Quartet No. 4 in C Minor, Op. 18, No. 4: I. Allegro ma non Tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec41f7e3ea059743bbb57a0a29c936d671fa0fc5ae760fff91197a6adfdad5db. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ130400571 — a six-check JSON result.
String Quartet No. 4 in C Minor, Op. 18, No. 4: II. Andante Scherzoso quasi Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e0f90320ee15f14da28e41c2ef3213f031c2e2b58ecac20604cbe3f96418d4. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/FRZ130400572 — a six-check JSON result.
String Quartet No. 4 in C Minor, Op. 18, No. 4: III. Menuetto, Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65523d6e115396ac0e7f9c8e164b71f727acc79215f5bfb3b58cb756886d9125. 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/FRZ130400573 — a six-check JSON result.
String Quartet No. 4 in C Minor, Op. 18, No. 4: IV. Allegretto, Prestissimo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d63e94e21a7b71debf833285b66ab091dbfde7f6ea444f959f3fcff4522e8a. 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/FRZ130400574 — a six-check JSON result.
Haydn: String Quartets, Op. 64, Nos. 1, 3 & 6 (Naïve Trésors)
Haydn: String Quartets Op. 64 Nos. 2, 4 & 5
Mozart: Quatuors Dédiés À Haydn & "Les Dissonances"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ccd89134831fb26dfcc151046ee65cd0e643cba1825a171091a98ecd43763e. 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/FR47Q0604270 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d1ac3aa8b1d13ace4491ab8559aed345213224f7dcda8a18132c0c627b7d5a. 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/FR47Q0604280 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fdab2b030f16426f6b1a6ede73e394c647ca8d6e5b1e097f4600580875ac72. 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/FR47Q0604290 — a six-check JSON result.
Quartet In A Major, K 464: IV. Allegro non Troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96251c30d87d7fe97ee7fd2bf91b775f998b8c2f3ef6c32c1f19730ad61b63d. 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/FR47Q0604300 — a six-check JSON result.
Quartet In C Major, "Les Dissonances", K 465: I. Adagio - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d09d4c37361d9d70a05444174742d1415756ab59b90dc79ecc2eba90724c5d4. 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/FR47Q0604310 — a six-check JSON result.
Quartet In C Major, "Les Dissonances", K 465: II. Andante Cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1b456d632c23a92087119e789e51a16f1333d928120049c8e7bb79c38a85b5. 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/FR47Q0604320 — a six-check JSON result.
Quartet In C Major, "Les Dissonances", K 465: III. Menuetto - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05600226c8de96b18108229898c11d27b21a2ba31ead7e9971d8da1e70c4208f. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/FR47Q0604330 — a six-check JSON result.
Quartet In C Major, "Les Dissonances", K 465: IV. Allegro Molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1262bab8319b07935fae0880bc7e7187c38f9dcb11e00b6be7819d474174b9b3. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/FR47Q0604340 — a six-check JSON result.
String Quartet No. 22 in B-Flat Major, K. 589 "Prussian": I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7403cbe7af30143051f4b87a94279adbd0d924df4aeaa35f31ade4a62798c9a9. 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/FR10S1753983 — a six-check JSON result.
String Quartet No. 20 in D Major, K. 499 "Hoffmeister": I. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d4efa8fe35088bd28820692c26299b1bb6e8440e02287ab43fb5a0edeb54ae. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FR10S1753987 — a six-check JSON result.
Mozart: The String Quartets Dedicated to Haydn
String Quartets, Op. 76, No. 1 in G Major, Hob. III:75: I. Allegro con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336f37bb5cd2502216ccea8fcc22e45b46c96c68172fe0e565e2e1e4bbb4c9b5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ139800440 — a six-check JSON result.
String Quartets, Op. 76, No. 1 in G Major, Hob. III:75: II. Adagio sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb69544a349c351e494d800ff16af89cdb04ce5c493907208a59a0a7a8634501. 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/FRZ139800430 — a six-check JSON result.
String Quartets, Op. 76, No. 1 in G Major, Hob. III:75: III. Minuet. Presto - Trio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc15c33464c2cb0d125aae905d20c67defa33f58d49d61fddcbbbe785be4c30. 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/FRZ139800460 — a six-check JSON result.
String Quartets, Op. 76, No. 1 in G Major, Hob. III:75: IV. Finale. Allegro ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7f85f562f6200d1c96478b5ffd139112226f8d3a8c4d40b2773db51a65739f. 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/FRZ139800450 — a six-check JSON result.
String Quartets, Op. 76, No. 5 in D Major, Hob. III:79: I. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061a87c1876388be5cd79ad671b6cbeed7b4fb07e38d5a7e45ac2f04426c5a40. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/FRZ130001650 — a six-check JSON result.
String Quartets, Op. 76, No. 5 in D Major, Hob. III:79: II. Largo cantabile e mesto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebfc2d8ab8eabd6240c8a9ff5c7da3604b1a0f492051815af48c0b7b60cc9cd6. 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/FRZ130001660 — a six-check JSON result.
String Quartets, Op. 76, No. 5 in D Major, Hob. III:79: III. Minuet - Trio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55127b98ea936c0852a3225938baf6255031a23486814f43a34bf15c8d039f3a. 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/FRZ130001680 — a six-check JSON result.
String Quartets, Op. 76, No. 5 in D Major, Hob. III:79: IV. Finale. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8591c227d7c19103594d5b9d82bbfce94742a10a50d4cff961d0ca1e373b54. 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/FRZ130001670 — a six-check JSON result.
String Quartets, Op. 76, No. 4 in B-Flat Major, Hob. III:78: I. Allegro con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579e336cc994cc6448e943fe02dd05e0b0c7251bf93d55be5340ffb5c51b89bf. 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/FRZ130001730 — a six-check JSON result.
String Quartets, Op. 76, No. 3 in C Major, Hob. III:77: II. Poco adagio cantabil
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf899611b4ab2ce83034177e8a74aa0b3e55282b753f953ebe2c4e7255dae346. 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/FRZ130001700 — a six-check JSON result.
Quatuor Op. 12 en mi bémol majeur: Adagio non troppo, Allegro non tardante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a0ba18fb488e3d50517dde243653454945155dbc14c4cff87af2c1afa1f448. 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/FRZ139702201 — a six-check JSON result.
Quatuor Op. 12 en mi bémol majeur: Canzonetta, allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d28c3be82c7bc43e13e41d213d127483117c240c07379ea846e2383c26de5b2. 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/FRZ139702202 — a six-check JSON result.
Quatuor Op. 12 en mi bémol majeur: Molto allegro e vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2f2b4d75ad0d411359a24950b7e911880e9310f7a3a1e35da4a1bce6191782. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRZ139702204 — a six-check JSON result.
Quatuor Op. 13 en la mineur: Adagio, allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0ccf68160804eadea4e3dc4a0aa17b4ee1c3dd1ab72294b11b4afab9d90d5b. 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/FRZ139702211 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c28095a79468dd86af67e96104269a0641283909c6d55be34f57f79d99bdb1b. 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/FRX201657546 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550e2f133adae7edb718ea3861644a116e99c19bb71216853fecbf6529f768c6. 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/FRX201657547 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3b109d0303bc072a9041c96a6a97a2877680feb12b4f0a13fd6247cd6989de. 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/FRX201657549 — a six-check JSON result.
String Quartets, Op. 33, No. 3 in C Major, Hob. III:39 "The Russian Quartets": I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120e5c0f809202e8ebcdbe47dbf48bf575ca715632706e7b4ee06f40a4ae2ad2. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/FRX201657550 — a six-check JSON result.
String Quartets, Op. 33, No. 1 in B Minor, Hob. III:37 "The Russian Quartets": I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba66be679b5ad0ad280441b510886ec688b6aff8106dfe4e49f840d00f857357. 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/FRX201657562 — a six-check JSON result.
Haydn: Quatuors à cordes, Op. 33, Nos. 5, 3 & 2
String Quartets, Op. 33, No. 3 in C Major, Hob. III:39 "The Bird": No. 1, Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7bef949e28db9269e21992295c9b91592efc9455b582f0edfc9b9cf1409efaa. 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/FRX201665976 — a six-check JSON result.
String Quartet No. 10 in E-Flat Major, Op. 125 No. 1, D. 87: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0ce2e7480449cef154b51b3eac07687362c4fc15cb810579799d0e56ec9aeb. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ139504521 — a six-check JSON result.
String Quartet No. 10 in E-Flat Major, Op. 125 No. 1, D. 87: II. Scherzo. Prestissimo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd6a2799c5bee3fa797e421e5ee666421fd6c7dd911064370f4dd3a4268abb7. 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/FRZ139504522 — a six-check JSON result.
String Quartet No. 10 in E-Flat Major, Op. 125 No. 1, D. 87: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08de9814e4c88d5cdb02a79e65fe7786f69d077e05f7f7a7a6a834ff63b2fb68. 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/FRZ139504523 — a six-check JSON result.
String Quartet No. 10 in E-Flat Major, Op. 125 No. 1, D. 87: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b3a9e11bf927ff3368dd5b659c952e06769d7d34c544922a3ee8328bb05070. 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/FRZ139504524 — a six-check JSON result.
String Quartet No. 13 in A Minor, Op. 29 No. 1, D. 804: I. Allegro ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1df6a77a7720429676529f7c6055132cfd5823a9bcf1c3ad66588a63ba3b33e. 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/FRZ139504531 — a six-check JSON result.
String Quartet No. 13 in A Minor, Op. 29 No. 1, D. 804: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a92a6ee6dd3d158badd0180af7a2d2e4d3a1bc11c069a266adb3c3c5f38d99. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ139504532 — a six-check JSON result.
String Quartet No. 13 in A Minor, Op. 29 No. 1, D. 804: III. Menuetto. Allegretto - Trio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d7124e46f506d1882b05aa8e2311e296db4c23e01c43ab8cc78199dc4d1a41. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ139504533 — a six-check JSON result.
String Quartet No. 13 in A Minor, Op. 29 No. 1, D. 804: IV. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b2fd6604c8542b12d6b2a4939c094c310640ee8d6eebdda22cbd3608812916. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FRZ139504534 — a six-check JSON result.
Hyacinthe & Louis-Emmanuel Jadin: Trois quatuors (Quatuor d'instruments Nicolas Lambert, Maître-Luthier à Paris)
String Quartet in C Major, Op. 3 No. 1: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6f88c3fe92539ce90f955a276b781fa68c8d6335ca04e74c8a7540abb9bfd5. 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/FR10S1700669 — a six-check JSON result.
String Quartet in C Major, Op. 3 No. 1: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c91440c4446d0c912fdf7d39b541452643f1f7e55ca8cd01d1ffc2c74153cf. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/FR10S1700670 — a six-check JSON result.
String Quartet in C Major, Op. 3 No. 1: III. Menuette, andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d815e39aab7cc4239dca1e1f4aa5f9f09be5d5a5d02d6ccf5b9ea289ec342cd. 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/FR10S1700671 — a six-check JSON result.
String Quartet in C Major, Op. 3 No. 1: IV. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686b8c4fe79d788b0e8c9cfbd4a420d984f36991205bd0d56885ad299f0b8830. 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/FR10S1700672 — a six-check JSON result.
String Quartet in E-Flat Major, Op. 2 No. 1: I. Largo - allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a979ed768de6ca0800b1db98681f5b3349c4a47c3781e0c78569f830ed1f49. 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/FR10S1700673 — a six-check JSON result.
String Quartet in E-Flat Major, Op. 2 No. 1: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7e29640381492e3da8ab84e31d725e884365345b94537decadab2408f37989. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR10S1700674 — a six-check JSON result.
String Quartet in E-Flat Major, Op. 2 No. 1: IV. Finale Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ee2c4ca7dca41ee96f9bbd427f195a10a3a211936df57dc2cd4fe39b7d341a. 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/FR10S1700676 — a six-check JSON result.
String Quartet in F Minor, Op. 2: II. Grazioso moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f476e3d47df1b7393cbcf440ccaf5f8b36269469c81ba517a1cf796536420a. 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/FR10S1700678 — a six-check JSON result.
String Quartet in F Minor, Op. 2: IV. Allegro non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b2f454eb9d81be1b332236874afb8c115d0718bb76cbb4238dd986ebb716fb. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FR10S1700680 — a six-check JSON result.
Mozart: Quintette avec Clarinette, K. 581 & Trio Les Quilles, K. 498
Quintette avec clarinette, K. 581: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e2842ccffb75d87409f652ee14769dc29a7116a5989b6d4acec89bff85cd5b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ139300081 — a six-check JSON result.
Quintette avec clarinette, K. 581: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19d35a34edad0065a39adbe9ceb64f619a3624740bc2fdead5f14ee254cfca9. 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/FRZ139300082 — a six-check JSON result.
Quintette avec clarinette, K. 581: III. Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d548e55e07ee7d351b4edbc68d29b3b32fbf2d609ea6088b55d27e31555fc9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ139300083 — a six-check JSON result.
Quintette avec clarinette, K. 581: IV. Allegretto con Variationi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3c97bd29e6b6ff426637152097cb69d4775f6569c5bb8941cc71d69f47c435. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/FRZ139300084 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcc3fad67e8606adf376570f8bf98e3bc94c214c354b1ef8b40fc893c98744c. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/FRZ139300091 — a six-check JSON result.
Trio, K. 498 "Les quilles": II. Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7283c58b2db3726cacd787e00ff800053e39e7a3c92bf7cf733d88d8439f1a. 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/FRZ139300092 — a six-check JSON result.
Trio, K. 498 "Les quilles": III. Rondeaux
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861542c5ae115a69347630f3e718cebfb5d3bb79556fe50f9e7f541a814acb81. 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/FRZ139300093 — a six-check JSON result.
Haydn: The Last Seven Words of Our Savior on the Cross
Haydn: Trois quatuors sur instruments d'époque,Op. 20, Vol. 1
String Quartet No. 31 in E-Flat Major, Op. 20 No. 1, Hob. III:31 "Sun Quartet No. 1": I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8630fe0eea164487adc0ac0f2ff104268733d3e4689980e8f9c5587a796f2a1. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX201644664 — a six-check JSON result.
String Quartet No. 32 in C Major, Op. 20 No. 2, Hob. III:32 "Sun Quartet No. 2": I. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d805bc24281e5214d24fc0e0d75e0ab2cdeb945195ae2cbf4f83f9d60553d7. 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/FRX201644676 — a six-check JSON result.
String Quartet No. 35 in F Minor, Op. 20 No. 5, Hob. III:35 "Sun Quartet No. 5": I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75760db20dbd5db2585a91c000c279a54e14a8f4c2e1b54a44183ee16bc1861. 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/FRX201644668 — a six-check JSON result.
String Quartet No. 34 in D Major, Op. 20 No. 4, Hob. III:34 "Sun Quartet No. 4": II. Un poco adagio e affettuoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0236951a4995d7ef4218cf2abe9e1ed11ac41b0d765309017a4a23997910ebd5. 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/FRX201644681 — a six-check JSON result.
Boccherini: Trois quintettes dédiés à la Nation Française
Mozart: Les quatuors dédiés à Haydn sur instruments d'époque, Vol. 3
Haydn: Trois quatuors sur instruments d'époque, Op. 20, Vol. 2
Haydn: Trois quatuors sur instruments d'époque, Op. 77
2 String Quartets, Op. 77 "Lobkowitz", No. 1 in G Major, Hob. III:81: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7162e8e7fef4e9cb4c6ef99d3b04cf2af13455440e140337e7bb280f6592fb19. 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/FRX201644624 — a six-check JSON result.
2 String Quartets, Op. 77 "Lobkowitz", No. 1 in G Major, Hob. III:81: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afa803c7d3f973304786ad5cfe855cdd95533b172169fb5f2c14b5a63b8e4f2. 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/FRX201644625 — a six-check JSON result.
2 String Quartets, Op. 77 "Lobkowitz", No. 2 in F Major, Hob. III:82: II. Menuet. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61e8b8894831d0517bfcbac667ef1e638e4351022bca9d3204151b9efc8a5de. 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/FRX201644629 — a six-check JSON result.
2 String Quartets, Op. 77 "Lobkowitz", No. 2 in F Major, Hob. III:82: III. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4016ccccb2d81065280ac6495c8c2f074712afec10f05e442ed10adaaf25a8. 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/FRX201644630 — a six-check JSON result.