Roman Hoffstetter (born 24 April 1742, in Laudenbach, near Bad Mergentheim, Holy Roman Empire; died: 21 May (Baker's) or June (New Grove 2nd) 1815, in Miltenberg-am-Main, Germany; alternative spelling
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 0xf41af9ca9a1b66e0346c5f039b70c7fe1e14d270ef6df7188e51e4ab57112f9c. 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/48bcf8bb-76df-484b-9f76-552c2a5f9831.json and https://artists.proofprofile.net/proofs/artist/48bcf8bb-76df-484b-9f76-552c2a5f9831.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Beethoven: String Quartet No. 7 in F Major, Op. 59 No. 1 "Razumovsky": I. Allegro
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefde2686b2dd863cf0ccda77c7c3ff95fb1cc3641f3f7148050744fd9d8993c. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), registered by our 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/GBAYC7900106 — a six-check JSON result.
Smetana: String Quartet No. 1 in E Minor "From My Life": I. Allegro vivo appassionato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb32e47592bd763438b0587fae246b1dde5af1ee5282f3624af98afc5c32de2. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9003593 — a six-check JSON result.
Ravel: String Quartet, M. 35: I. Allegro moderato - Très doux
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929c854866069683ff31582678d35afb887e6631135aa7716ad882ff49165c54. 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/GBAYC8400087 — a six-check JSON result.
Haydn: String Quartet in C Major, Op. 76 No. 3, Hob. III:77 "Emperor": I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042963ff69040ac49f83927925f8a07ad308a69972ce519c0d7b515c4cd59e6f. 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/GBAYC9401705 — a six-check JSON result.
Beethoven: String Quartet No. 7 in F Major, Op. 59 No. 1 "Razumovsky": II. Allegretto vivace e sempre scherzando
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482875c8b3e68478db29e74e1af1576351c73c5c39b9541bb0109db82ffc1992. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/GBAYC7900107 — a six-check JSON result.
Smetana: String Quartet No. 1 in E Minor "From My Life": II. Allegro moderato à la Polka
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f39a9c7c4e3cb3c353073671b96f735b8c32f5e5703076d7de268a8e64e6024. 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/GBAYC9003594 — a six-check JSON result.
Ravel: String Quartet, M. 35: II. Assez vif - Très rythmé
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1aff9257a35e76a76a2f130b80d73a5b18d8b80d6833e964e25890d7910327. 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/GBAYC8400088 — a six-check JSON result.
Haydn: String Quartet in C Major, Op. 76 No. 3, Hob. III:77 "Emperor": II. (a) Poco adagio, cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde91b86d13c2e6e0327747dfc62f4999b83a6fd183820ea47bcee4588eb8ca2c. 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/GBAYC9401706 — a six-check JSON result.
Beethoven: String Quartet No. 7 in F Major, Op. 59 No. 1 "Razumovsky": III. Adagio molto e mesto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fb564e21bf42adc1885947d87c6c1be6127e7a8718ffa50dbc168924f49538. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC7900108 — a six-check JSON result.
Smetana: String Quartet No. 1 in E Minor "From My Life": III. Largo sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd873221b5c579010d0a0502e874c3dc3f3ae11ba34aa6a25339dd7af85958372. 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/GBAYC9003595 — a six-check JSON result.
Ravel: String Quartet, M. 35: III. Très lent
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ef8ada00527c5658ab45a1cb83422ed9ceb71c673590251101b4ae932d9f1b. 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/GBAYC8400089 — a six-check JSON result.
Haydn: String Quartet in C Major, Op. 76 No. 3, Hob. III:77 "Emperor": II. (b) Variation I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f96d6bcdc34c904828c7e6192c37db455e765d9ddee6707d5d674b200bacbef. 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/GBAYC9401707 — a six-check JSON result.
Beethoven: String Quartet No. 7 in F Major, Op. 59 No. 1 "Razumovsky": IV. Thème russe. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f299bb100a222b82c53642a2a1bec33d963a8ed79e3f789e90fc5e55ef645a3. 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/GBAYC7900109 — a six-check JSON result.
Smetana: String Quartet No. 1 in E Minor "From My Life": IV. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd174ff65d5a05a5e715cdb63f96cf75341ed551643cacd1c36468cb8525c37. 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/GBAYC9003596 — a six-check JSON result.
Ravel: String Quartet, M. 35: IV. Vif et agité
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3e40b5c20c90d3e9b9faf334e09f9eec4c97f9420e559df3effff501f801bb. 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/GBAYC8400090 — a six-check JSON result.
Haydn: String Quartet in C Major, Op. 76 No. 3, Hob. III:77 "Emperor": II. (c) Variation II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc243802a635b385f92f1d1809afce760d596340f07b3c0058ca480d79d0a0caa. 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/GBAYC9401708 — a six-check JSON result.
Mendelssohn: String Quartet No. 2 in A Minor, Op. 13, MWV R22: I. Adagio - Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a1ab5d770122345c3fca809d9847d2b56b81b9d925f3312e63d1e0baeabb7a. 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/GBAYC0003566 — a six-check JSON result.
String Quartet No. 2, 'Intimate Letters': I. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7ca71e33558a260067d06f2e925fd20af74501701ed37768b53954a2f7bd41. 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/GBAYC9401714 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f6e17eb7c602dd143ae77f71aab811a0d09f7488681d65405fc2e8928b71c9. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/GBAYC9201681 — a six-check JSON result.
Haydn: String Quartet in C Major, Op. 76 No. 3, Hob. III:77 "Emperor": II. (d) Variation III
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2332898eca5e198eb514b68fc0b75db9689d9a74379499ab33886abfa0b86e. 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/GBAYC9401709 — a six-check JSON result.
Mendelssohn: String Quartet No. 2 in A Minor, Op. 13, MWV R22: II. Adagio non lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27f9e1e3d6d7e8bf013b4f6c29bdcba95cfa328521fe9568882f1b047bf66ec. 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/GBAYC0003567 — a six-check JSON result.
String Quartet No. 2, 'Intimate Letters': II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52372e89c4dd9ce112b3ba6564ce0cf949c5f1d8619ac02ace7f5bb538ac2fe2. 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/GBAYC9401715 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda236945a3785e0ab759291565c8a97d14a2548ba5b06805d4bf19541c84f501. 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/GBAYC9201682 — a six-check JSON result.
Haydn: String Quartet in C Major, Op. 76 No. 3, Hob. III:77 "Emperor": II. (e) Variation IV
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d263805f216f9ead2d50a5facb3dd5add1db534354170ebef4798f73e573775. 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/GBAYC9401710 — a six-check JSON result.
Mendelssohn: String Quartet No. 2 in A Minor, Op. 13, MWV R22: III. Intermezzo. Allegretto con moto - Allegro di molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe23dd764fbcbb91484b8df73a100b4efd34198fee635daad0953960da259b65. 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/GBAYC0003568 — a six-check JSON result.
String Quartet No. 2, 'Intimate Letters': III. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce93806c83c0fc63b2ec4f1cfc76833357d3ac1ecefd68985faa76520404fd4. 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/GBAYC9401716 — a six-check JSON result.
Berg: Lyric Suite for String Quartet: III. Allegro misterioso - Trio estatico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d9fe54b7a7f663a2fb5488b6a31674fbc9e6990aadbf61da7e741e7618b18b. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/GBAYC9201683 — a six-check JSON result.
Haydn: String Quartet in C Major, Op. 76 No. 3, Hob. III:77 "Emperor": III. Menuetto. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc379eb0176acd740775eeab20b3d78b42d5be7d81c1875d83f97eeaff4cd3849. 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/GBAYC9401711 — a six-check JSON result.
Mendelssohn: String Quartet No. 2 in A Minor, Op. 13, MWV R22: IV. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b009a3c9df7af98077c1d4f924822d12b3a6eea8693d2cb75268ec4e4f3f70c. 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/GBAYC0003569 — a six-check JSON result.
String Quartet No. 2, 'Intimate Letters': IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515c5c7494a9c322020e7771d168a2a3bcd3090f04e3a2065a48b0ffad3d65f1. 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/GBAYC9401717 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81b3b3b693ef9118114227f1a3b2935b4b8247eb026f7050ef62be5d791be56. 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/GBAYC9201684 — a six-check JSON result.
Haydn: String Quartet in C Major, Op. 76 No. 3, Hob. III:77 "Emperor": IV. Finale. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3db4244426d4341c9a8624f5f23163e53ff7caaadd8d389a6e8ca440ae704d5. 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/GBAYC9401712 — a six-check JSON result.
Bartók: String Quartet No. 4 in C Major, Sz. 91: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945fda0e7805efbd3fe510b83b52c3f7b6041135a3beca69982ff40496fd492b. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), registered by our 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/GBAYC0202179 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d4ddfd22f75c652ac2a40e58d11d596f50d836237dd7dd6290151f5fbbe19e. 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/GBAYC9201685 — a six-check JSON result.
Mozart: String Quartet No. 20 in D Major, K. 499 "Hoffmeister": I. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3881b93aaf21d9f4854aecc92e02869308a7db46325f8fd0eb17b50691d56641. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), registered by our 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/GBAYC8802869 — a six-check JSON result.
Bartók: String Quartet No. 4 in C Major, Sz. 91: II. Prestissimo, con sordino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe356ee2e25e061d8c583af2d26c79cede6e0f6e375271f34a8b98c7d96365af7. 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/GBAYC0202180 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5374a11da5c4388ba2ac9adec6c867a90af8a1d8dcb70ef4babe5d58448b414e. 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/GBAYC9201686 — a six-check JSON result.
Mozart: String Quartet No. 20 in D Major, K. 499 "Hoffmeister": II. Menuetto. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cf33cee4b2661b5b4a1c9eb9f2e57a72647c2a3c3f8170e63a813bbf50a828. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8802870 — a six-check JSON result.
Bartók: String Quartet No. 4 in C Major, Sz. 91: III. Non troppo lento
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Stravinsky: Double Canon for String Quartet "Raoul Dufy in memoriam"
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Mozart: String Quartet No. 20 in D Major, K. 499 "Hoffmeister": III. Adagio
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Mozart: String Quartet No. 20 in D Major, K. 499 "Hoffmeister": IV. Allegro
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Bartók: String Quartet No. 4 in C Major, Sz. 91: IV. Allegretto pizzicato
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Rihm: String Quartet No. 4: I. Agitato, allegro - Alla marcia, allegro ma non troppo (Live at Vienna Konzerthaus, 1990)
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Hoffstetter: String Quartet in F Major, Op. 3 No. 5: II. Andante cantabile "Serenade" (Formerly Attributed to Haydn as Hob. III:17)
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Bartók: String Quartet No. 4 in C Major, Sz. 91: V. Allegro molto
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Beethoven: String Quartet No. 16 in F Major, Op. 135: I. Allegretto (Live at Konzerthaus, Wien, 1989)
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Beethoven: String Quartet No. 16 in F Major, Op. 135: II. Vivace (Live at Konzerthaus, Wien, 1989)
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Beethoven: String Quartet No. 16 in F Major, Op. 135: III. Lento assai, cantante tranquillo (Live at Konzerthaus, Wien, 1989)
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Beethoven: String Quartet No. 16 in F Major, Op. 135: IV. Grave ma non troppo tratto - Allegro (Live at Konzerthaus, Wien, 1989)
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Haydn: String Quartets, Op. 33 No. 3 "The Bird", Op. 77 Nos. 1 & 2
Haydn: String Quartet in C Major, Op. 33 No. 3, Hob. III:39 "The Bird": I. Allegro moderato (Live at Wiener Konzerthaus, 1999)
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Haydn: String Quartet in C Major, Op. 33 No. 3, Hob. III:39 "The Bird": II. Scherzo. Allegretto - Trio (Live at Wiener Konzerthaus, 1999)
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Haydn: String Quartet in C Major, Op. 33 No. 3, Hob. III:39 "The Bird": III. Adagio (Live at Wiener Konzerthaus, 1999)
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Haydn: String Quartet in C Major, Op. 33 No. 3, Hob. III:39 "The Bird": IV. Finale. Rondo presto (Live at Wiener Konzerthaus, 1999)
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Haydn: String Quartet in G Major, Op. 77 No. 1, Hob. III:81: I. Allegro moderato
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Haydn: String Quartet in G Major, Op. 77 No. 1, Hob. III:81: II. Adagio
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Haydn: String Quartet in G Major, Op. 77 No. 1, Hob. III:81: III. Menuetto. Presto
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Haydn: String Quartet in G Major, Op. 77 No. 1, Hob. III:81: IV. Finale. Presto
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Haydn: String Quartet in F Major, Op. 77 No. 2, Hob. III:82: I. Allegro moderato
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Haydn: String Quartet in F Major, Op. 77 No. 2, Hob. III:82: II. Menuetto - Trio
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Haydn: String Quartet in F Major, Op. 77 No. 2, Hob. III:82: III. Andante
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Haydn: String Quartet in F Major, Op. 77 No. 2, Hob. III:82: IV. Finale. Vivace assai
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Suite bergamasque, L. 75: Clair de lune (Orch. Mouton)
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Piano Sonata No. 14 in C-Sharp Minor, Op. 27 No. 2 "Moonlight Sonata": I. Adagio sostenuto
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Concierto de Aranjuez for Guitar and Orchestra - Transcribed for harp & orchestra: Adagio
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Eine kleine Nachtmusik, K. 525: Romance (Andante)
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Choeur de l'Orchestre Symphonique de Montréal
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Five Variants of "Dives and Lazarus": Five Variants of "Dives and Lazarus" (extract)
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Keyboard Concerto in F Minor, BWV 1056: Largo - Performed on Piano
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Gypsy Melodies, Op. 55, No. 4 - Songs My Mother Taught Me
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Concerto grosso in D, Op. 6, No. 1: 2. Largo
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12 Concerti Grossi - Orch. Ch. Avison - Concerto No. 6 in D: 1. Largo
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The Knot Collection of Ceremony & Wedding Music selected by The Knot's Carley Roney
Orchestral Suite No. 3 in D Major, BWV 1068: II. Air
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Cantata, BWV 147: Jesus bleibet meine Freude
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String Quartet in F Major, Op. 3, No. 5, Hob. III:17: II. Andante cantabile
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Canon and Gigue in D Major, P. 37: Canon
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Thaïs: Méditation (Arr. for Cello & Piano)
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Gianni Schicchi: O mio babbino caro (Arr. C. Leon for Violin & Orchestra)
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La Réjouissance from Music for the Royal Fireworks
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I. Allegro from Concerto No. 1 in E Major, Op. 8, No. 1, RV 269 (Spring from The Four Seasons)
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Wedding March from A Midsummer Night's Dream
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Clarinet Concerto in A Major, K. 622: 2. Adagio
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Die Walküre, WWV 86B, Act III: Ride of the Valkyries
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Swan Lake, Op. 20, TH. 12, Act II: No. 10 Scène
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Carmen Suite No. 1: 6. The Toreador Song
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Symphony No. 7 in A Major, Op. 92: II. Allegretto
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The Sleeping Beauty, Op. 66, TH. 13, Act I: 6. Waltz
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3 Gymnopédies: 1. Lent et douloureux (Arr. for orchestra by Claude Debussy)
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Serenade in B-Flat Major, K. 361 "Gran partita": 3. Adagio
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Symphony No. 29 in A Major, K. 201: II. Andante
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String Quartet In F Major, Hob.III No.17, Op.3 No.5 - "Serenade": II. Andante cantabile
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Fantasía para un gentilhombre for Guitar and Small Orchestra: II. Españoleta y Fanfare del la caballería de Nápoles: Adagio
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Le Carnaval des Animaux, R.125: Le Cygne
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Symphony No. 3 in F, Op. 90: 3. Poco allegretto
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Water Music Suite No. 1 in F Major, HWV 348: V. Air
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The Piano: The Heart Asks Pleasure First
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Canon in D Major, P. 37/1 (Orch. Münchinger)
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The Nutcracker Suite, Op. 71a: Dance of the Sugar Plum Fairy – Waltz of the Flowers
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Ich mag keine Klassik, aber das gefällt mir! - Für Kinder
Serenade No. 13 in G Major, K. 525, "Eine kleine Nachtmusik": II. Romance. Andante
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Albumblatt für Elise, Bagatelle in A Minor, WoO 59
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Suite for Flute, Strings and Continuo in B Minor, BWV 1067: VII. Badinerie
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Hungarian Dances, WoO 1: No. 5 in G Minor
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Humoresque in G-Flat Major, Op. 101, No. 7 (Arranged for Violin & Orchestra)
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Die Zauberflöte, K. 620: Der Vogelfänger bin ich ja
Württembergisches Kammerorchester Heilbronn
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Die Forelle, D. 550 (Arr. for Cello, Piano and Contrabass)
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Suite Bergamasque, L. 75: III. Clair de lune
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Le carnaval des animaux, R. 125: No. 12, Fossiles
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Suite No. 2 for Jazz Orchestra: VII. Waltz II
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Préludes, Op. 28: No. 15 in D-Flat Major, "Raindrop"
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The Four Seasons - Violin Concerto in E Major, Op. 8 No. 1, RV 269 "Spring": I. Allegro
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The Nutcracker, Op. 71, TH 14: Act II: No. 14, Pas de deux. Variation II, Dance of the Sugar-Plum Fairy
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Peer Gynt Suite No. 1, Op. 46: IV. In the Hall of the Mountain King
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Pictures at an Exhibition - Orchestra Version: No. 3: Les Tuileries (Dispoute d'enfants après jeux)
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La campanella (No. 3, Grandes études de Paganini)
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Clarinet Concerto in A Major, K. 622: II. Adagio
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Messiah, HWV 56: Part 2: Hallelujah (Chorus)
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Symphony No. 5 in C Minor, Op. 67: I. Allegro con brio
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Rondo alla Ingharese quasi un Capriccio in G Major, Op 129 "Die Wuth über den verlorenen Groschen"
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Piano Sonata No. 11 in A Major, K. 331/300i: III. Alla Turca
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Suite for Orchestra No. 3 in D Major, BWV 1068: II. Air
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Hänsel und Gretel: Act II: Abends will ich schlafen gehn
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Water Music Suite No. 2 in D Major, HWV 349: Hornpipe
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Water Music Suite No. 1 in F Major, HWV 348: Air
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Piano Sonata No. 14 in C-Sharp Minor, Op. 27 No. 2 "Moonlight": I. Adagio sostenuto
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The Four Seasons, Winter, Violin Concerto in F Minor, RV 297, Op. 8 No. 4: II. Largo
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2 Nordic Melodies, Op. 63: 2. Cowkeeper's Tune and Country Dance
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Nocturne No. 15 in F minor, Op. 55 No. 1
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Much Ado About Nothing - Incidental Music - Concert Suite: Intermezzo (Garden Scene)
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24 Preludes, Op. 28: No. 15 in D-Flat Major "Raindrop Prelude"
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La Vierge / Scene 4: The Assumption: Le dernier sommeil de la Vièrge (The Last Sleep of the Virgin)
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Swan Lake, Op. 20, TH.12 / Act 2: No. 13e Danse des cygnes: Pas d'action: Odette et le prince/Deuxième danse de la reine des cygnes (Andante)
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A Midsummer Night's Dream, Op. 61: Nocturne
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Two Aquarelles: Gaily, but not too quick
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Auf dem Wasser zu singen, S.558 No. 2 (after Schubert, D.774)
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Brandenburg Concerto No. 2 in F, BWV 1047: 1. (Allegro)
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Serenade in G, K.525 "Eine kleine Nachtmusik" - Orchestral version: 1. Allegro
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Symphony No. 40 In G Minor, K.550: 1. Molto allegro - Excerpt
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Peer Gynt, Op. 23 - Concert version by Kurt Masur & Friedhelm Eberle: Prelude: Morning Mood
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Rhapsody on a Theme by Paganini, Op. 43: Variation 18
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Le Carnaval des Animaux, R. 125: Le Cygne
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Liebestraum No. 3 in A flat, S.541 No. 3
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String Quintet E, Op.13, No.5: 3. Menuetto
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Symphony No. 5 in C-Sharp Minor / Pt. 3: 4. Adagietto (Sehr langsam)
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Herz und Mund und Tat und Leben, Cantata BWV 147: Jesu Joy Of Man's Desiring
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Nocturne No. 2 in E-Flat Major, Op. 9 No. 2
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Violin Concerto In D, Op. 35, TH. 59: 1. Allegro moderato
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Piano Sonata No. 11 In A, K.331 -"Alla Turca": 3. Alla Turca (Allegretto)
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Il barbiere di Siviglia / Act I: No. 2 Cavatina: "Largo al factotum"
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Les Contes d'Hoffmann / Act 4: Entr'acte (Barcarolle)
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21 Hungarian Dances, WoO 1 - Orchestral Version: No. 5 in G Minor
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"Pomp and Circumstance," Op. 39: March, No. 1 in D
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Symphonie fantastique, H. 48: IV. Marche au supplice
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Violin Concerto In E Minor, Op. 64, MWV O14: 1. Allegro molto appassionato
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Concerto For Violin And Strings In F Minor, Op. 8, No. 4, RV 297 "L'inverno": 2. Largo
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Peer Gynt, Op. 23 - Concert version by Kurt Masur & Friedhelm Eberle: "In the Hall of the Mountain King"
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Carl Philipp Emanuel Bach Chamber Orchestra
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Pelléas et Mélisande, Op. 80: 4. Sicilienne
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Piano Concerto No. 3 in D minor, Op. 30: 1. Allegro ma non tanto
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Nulla in mundo pax, R.630: 1. Nulla in mundo pax (Larghetto)
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Orchestra dell'Accademia Nazionale di Santa Cecilia
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Adagio from Spartacus: Onedin Line theme
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Piano Sonata No. 8 in C Minor, Op. 13 "Pathétique": II. Adagio cantabile
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Also sprach Zarathustra, Op. 30: I. Prelude. Sunrise
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Pictures at an Exhibition (Orch. by Maurice Ravel): 15. The Great Gate of Kiev
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Romeo and Juliet, Op. 64 / Act 1: 13. Dance Of The Knights
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String Quintet in E Major, G. 275: III. Menuetto
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String Quintet in E Major, Op. 11 No. 5, G. 275: III. Minuetto
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String Quartet in F Major, Op. 3 No. 5, Hob. III:17: II. Serenade. Andante cantabile
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3 German Dances, K. 605: Organ Concerto No. 6 in B-Flat Major, Op. 4, HWV 294: III. Allegro moderato (Transcribed for Harp and Orchestra)
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King Arthur, Z. 628 "The British Worthy": Aire. Minuet
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Concerto for 2 Violins in D Minor, BWV 1043: II. Largo ma non tanto
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Orfeo ed Euridice, Wq. 30 / Act 2: Dance of the Blessed Spirits
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Lakmé / Act 1: Viens, Mallika, ... Dôme épais (Flower Duet)
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Crux Fidelis (after "Ombra ma fu"- Xerses, HWV 40)
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String Quartet No. 2 in D Major: III. Notturno. Andante
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String Quartet in F Major, Op. 3, No. 5 (formerly attrib. J. Haydn): Serenade
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Ancient Airs And Dances, Suite No. 3, P. 172: 1. Italiana
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Piano Concerto No. 21 in C Major, K. 467: II. Andante
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Les Contes d'Hoffmann / Act 2: "Belle nuit, ô nuit d'amour"
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Madama Butterfly, Act II: Humming Chorus
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String Quintet in C, D.956: 2. Adagio (excerpt)
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Piano Concerto No. 5 in E flat major Op. 73 -"Emperor": 2. Adagio un poco mosso
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Fantasía para un gentilhombre for Guitar and Small Orchestra: 2. Españoleta (excerpt)
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Was mir behagt, ist nur die muntre Jagd, Cantata BWV 208: 9. Sheep May Safely Graze
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Le carnaval des animaux, R. 125: XIII. Le cygne (Arr. Palmer for Cello & Orchestra)
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Te Lucis ante Terminum (after "Song of the Birds")
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Cello and Orchestra Concerto No. 6 in D Minor, G 479: 2. Andante cantabile
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Minuet from String Quintet in E, Op. 13, No. 5
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Symphony No. 9 in E minor, Op. 95 "From the New World": 2. Largo - Extract
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Carmen Suite No. 1: III. Intermezzo (Entracte After Act II)
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Symphony No. 2 in E minor, Op. 27: 3. Adagio - Excerpt
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12 Violin Concertos, Op. 8 "Il cimento dell'armonia e dell'inventione" / Concerto No. 4 in F Minor for solo violin, RV297 "L'Inverno": II. Largo
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Concierto de Aranjuez for Guitar and Orchestra - Transcribed for harp & orchestra: 2. Adagio (excerpt)
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Eine kleine Nachtmusik, K. 525: II. Romance. Andante
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Concerto for Lute, 2 Violins and Continuo in D major, RV 93: 2. Largo (Arr. for Guitar)
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Canon and Gigue in D Major, P. 37: 1. Canon
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String Quartet in E Major, G275: Minuet (Arr. For Orchestra)
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The Prince of Denmark's March (Arr. Henry Wood)
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6 Stücke, Op. 32: 3. Frühlingsrauschen (Rustle of Spring)
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Stabat Mater, P. 77: 1. Stabat Mater Dolorosa
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La Gioconda, Op. 9, Act III: Dance of the Hours
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Symphony No. 1 in D Major, Op. 25 "Classical Symphony": I. Allegro
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Orfeo ed Euridice, Wq. 30: Dance Of The Furies
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Orfeo ed Euridice, Wq. 30: Ronde des esprits bienheureux
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Notturno In F Major, P. 106: III. Adagio
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Serenade in G Major, K. 525 "Eine kleine Nachtmusik": II. Romance (Andante)
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The Creatures of Prometheus, Op. 43: No. 16 Finale. Allegretto
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A Midsummer Night's Dream, Incidental Music, Op. 61, MWV M 13: V. Intermezzo. Allegro appassionato
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A Midsummer Night's Dream, Incidental Music, Op. 61, MWV M 13: VII. Notturno. Con moto tranquillo
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Rosamunde, D. 797: Ballet Music No. 1 - Andante un poco assai
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Lieder ohne Worte (Songs without Words), Book 5, Op. 62: Fruhlingslied, Op. 62, No. 6 [arr. For flute]
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String Quartet in F Major, Op. 3, No. 5, Hob. III:17, "Serenade": String Quartet in F Major, Op. 3/5, Hob.III:17, "Serenade" (attrib. Hoffstetter): II. — [Attrib. Haydn]
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String Quartet in F Major, Op. 3 No. 5: II. Andante cantabile (Serenade)
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String Quartet No. 17 in F Major, Hob. III:17: II. Andante cantabile
String Quartet No. 17 in F Major, Op. 3 No. 5, Hob. III:17: II. Andante cantabile
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Joseph Haydn: String Quartets, Op. 3, Nos. 4 & 6 (Attrib. Hoffstetter)
Hoffstetter: Quatuor à cordes - EP (Formerly Attributed to Joseph Haydn as Op. 3 No. 5, Hob. III:17, Mono Version)
Pachelbel: Canon / Mozart: Eine kleine Nachtmusik / Albinoni: Adagio
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Serenade in G, K.525 "Eine kleine Nachtmusik" - Orchestral version: 2. Romance (Andante)
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Serenade in G, K.525 "Eine kleine Nachtmusik" - Orchestral version: 3. Menuetto (Allegretto)
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Serenade in G, K.525 "Eine kleine Nachtmusik" - Orchestral version: 4. Rondo (Allegro)
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String Quartet in F, H.III No.17, Op.3 No.5 - "Serenade": 2. Andante cantabile
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Adagio in G Minor (formerly Attrib. Albinoni)
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Albinoni / J.S.Bach / Handel / Pachelbel etc.: Adagio / Fugue in G minor / Organ Concerto No.4 / Canon etc.
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Herz und Mund und Tat und Leben, Cantata BWV 147: Jesu, Joy Of Man's Desiring, BWV147
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Prelude (Fantasy) and Fugue in G Minor, BWV 542 "Great" - Arr. Münchinger: Fugue
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Minuet from String Quintet in E Major, Op. 13 No. 5
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String Quartet in F Major, Op. 3, No. 5 (formerly attrib. J. Haydn): Andante cantabile
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12 Concerti grossi, Op. 6, HWV 319-330 / Concerto grosso In G Minor, Op. 6, No. 6, HWV 324: Musette: Larghetto
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Solomon HWV 67 / Act 3: 42. Sinfonia: The Arrival Of The Queen Of Sheba
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Organ Concerto No. 4 in F, Op. 4 No. 4 HWV 292: Allegro
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Organ Concerto No. 4 in F, Op. 4 No. 4 HWV 292: Andante
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Organ Concerto No. 4 in F, Op. 4 No. 4 HWV 292: Adagio - Allegro
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Variations for Piano on "Ah, vous dirai-je, Maman", K. 265 - Excerpt
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Eine kleine Nachtmusik, K. 525: II. Romanze. Andante - Instrumental
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Goldberg Variations, BWV 988: Aria. Andante espressivo
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3 Nocturnes, Op. 9: No. 2 in E-Flat Major. Andante
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Little Suite from the "Anna Magdalena Notebook"; III. Bist du bei mir, BWV 508
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Air ("on the G String") from Orchestral Suite No. 3, BWV 1068
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The Nutcracker, Op. 71: Scene 13: Waltz of the Flowers
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4 Pieces for String Quartet, Op. 81: III. Capriccio. Andante con moto, MWV R 32
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String Quartet No. 1, TH ii/30: III. Scherzo
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String Quartet No.2, Op. 26: II. Intermezzo
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String Quartet in A Minor: II. Scherzo. Allegro vivo, con spirito
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String Quartet in F major, Hob.III:17: II. Andante Cantabile
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Thaïs, DO 24, Act II: "Méditation" - Arr. for Cello and Orchestra - Live
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The Carnival of the Animals: XIII, The Swan
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5 Lieder, Op. 49: No. 4, Wiegenlied - Brahms's Lullaby
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Orchestral Suite No. 3 in D Major, BWV 1068: II. Air on the G String
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Pelléas et Mélisande: I. Ils étaient comme des enfants
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Pelléas et Mélisande: X. Les ombres dans le jardin
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Le grand cahier: I. La forêt et la rivière
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String Quartet in F Major, Op. 3 No. 5: II. Andante cantabile "Serenade" - Arr. for String Orchestra
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String Quartet No. 1, Op. 11: II. Andante Cantabile - Arr. for String Orchestra
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Serenade for Strings in E Major, Op. 22: IV. Larghetto
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6 Pieces from Cinderella, Op. 102: No. 6, Amoroso
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Préludes, Premier livre, L. 117: No. 8, La fille aux cheveux de lin. Molto calmo e dolcemente espressivo
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Nocturnes, Op. 9: No. 2 in E-Flat Major, Andante
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Liebesträume, S. 541: No. 3 in A-Flat Major
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Deux arabesques, L. 66: No. 1 in E Major, Andantino con moto
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Douze études, Op. 25: No. 1 in A-Flat Major "Aeolian Harp"
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Samson and Delilah: "My Heart at Thy Sweet Voice" - Arr. for Violin and Piano
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Les contes d'Hoffmann, IV: "Barcarolle: Belle nuit, ô nuit d'amour" - Arr. for Violin and Piano
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The Nutcracker, Op. 71: Pas de deux - Arr. for Piano by Mikhail Pletnev
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Famous Melodies for Violin and Piano, Vol. 1
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String Quartet in F Major, Op. 3 No. 5, Hob. III:17: II. Andante cantabile (Serenade) - Instrumental
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Gavotte in D Major "Rosine" - Instrumental
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Piano Sonata No. 11 in A Major, K. 331: III. Alla turca (Arr. R. Kapp for Orchestra) - Instrumental
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Bagatelle in A Minor, WoO 59 "Für Elise" (Arr. R. Kapp for Piano & Orchestra) - Instrumental
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Hofsetter: Serenade (Attrib Haydn) Andante from Sting Quartet I in F Maj
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Mendelssohn: Canzonetta from String Quartet in Ebmaj Op.12
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Borodin: Nocturne from String Quartet in Dmaj
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Barber: Adagio from String Quartet Op.11
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Johann Sebastian Bach | Charles-François Gounod
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