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 0xc18124bda4a2026497b7d2505fad1f062f18dd3eedb95fe1db71f5cde5c24326. 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/f2722bdf-bedf-414d-9c46-a39dd84086d7.json and https://artists.proofprofile.net/proofs/artist/f2722bdf-bedf-414d-9c46-a39dd84086d7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Capolavori della musica classica italiana
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 0xbd4b9bd95233da2f74c81c7865632e67bb71abe1ad75fc3c8c6691112993bea0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USNA19312424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68dfdc05190400d70148524657f58378dfe21d9d64eb5e15cc123d0ae963fe76. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USNA10319618.
Narada Guitar 2 (The Best Of Two Decades)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1135df48abe0ca390a8f5cc3e9d168f2e7b7fd56de5c6d6ed47d88fc6f9cf48a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USNA19916965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f575e7a5b2798e7268d04da83c3267617534df284cc46a52967aa1412bf30e0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA580800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29885f4a23d2e3e374713f8958a4e9844592385a7400b833d9d73c32c9b9c9e4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA580600671.
CastelnuovoTedesco: Platero & I, Op. 190 (Narrated in English)
PAGANINI: Music for Violin and Guitar, Vol. 1
The Guitar Music of Zani de Ferranti and Ferrer
Paganini: Music for Violin and Guitar, Vol. 2
Grand Sonata in A Major: Introduction - Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8ab9fe6fbb68f297c323cf0675961a67e772a24094e8ba3cfa5c0900292127. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199283701.
Grand Sonata in A Major: Cantabile - Andante sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87219f9ec5832f88b8f1a2965d5254e4b37c8fe0d6926f3546d5a90976a5beb1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199283702.
Grand Sonata in A Major: Theme and Variations
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f85181d3140df24c9e617898e0dcc186a8e9f5d9c8d7003f869de8c37ee8ac2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199283703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c365854298e84f970c0b20f538e0af5666e4538437f0b20c4b395f911394691. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199283704.
Sonata for Violin and Guitar in A Major, Op. 2, No. 1, MS 26: Minuetto - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144d0ef00c82bd2be41e03a7d7fcf60adc83a582914272ebc9db96f3f4060735. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199283705.
Sonata for Violin and Guitar in A Major, Op. 2, No. 1, MS 26: Polonese
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282e2e2344fcd1f3332b39eb4ee44a09589c52ca48e4ef1b2bf1c42b6376fc20. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199283706.
Sonata for Violin and Guitar in C Major, Op. 2, No. 2, MS 26: Larghetto espressivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf732fba821d200396a7b5cf4a6f374864bcef2575f4820c57d49448324abfb3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199283707.
Sonata for Violin and Guitar in C Major, Op. 2, No. 2, MS 26: Allegro spiritoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61315baeb2c346cc9475f680a021e1d26a7832fe2e8799533173b9ee3ff3193. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199283708.
Sonata for Violin and Guitar in D Minor, Op. 2, No. 3, MS 26: Adagio maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe898e222bac66812efbce09ef43d03edb2f993cd953cdd7cdd961a5ad863e614. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199283709.
Sonata for Violin and Guitar in D Minor, Op. 2, No. 3, MS 26: Andante galantemente
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2a2a9e920dbc6b96e3dc6047f498b27fa8224ab907076cc5405023e955dedd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199283710.
Sonata for Violin and Guitar in A Major, Op. 2, No. 4, MS 26: La Sinagoga - Andante calando
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a10e90472b1c920214cf501e68ae6636558f2675b58f705eefa672bc90aa289. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199283711.
Sonata for Violin and Guitar in A Major, Op. 2, No. 4, MS 26: Andantino con brio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c72bf868ced0fe387974b55070e30ae555a646403dc54737be49904b3e16fde. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199283712.
Sonata for Violin and Guitar in D Major, Op. 2, No. 5, MS 26: Andante moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51efd93f4f90325e49a0990d31461efb5c3ad931b4d51272b10544c7b910b09. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199283713.
Sonata for Violin and Guitar in D Major, Op. 2, No. 5, MS 26: Allegro spiritoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002616b3160e5ca2180c6c38cc3ce853488ce05d6aa6655aa70c1e9a5f96bb0e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199283714.
Sonata for Violin and Guitar in A Minor, Op. 2, No. 6, MS 26: Largo con precisione
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0fcf49cd5537e3d1c9af3aef1b48fab37fcc1586b17efcb54422eedbd69a89. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199283715.
Sonata for Violin and Guitar in A Minor, Op. 2, No. 6, MS 26: Tempo di Walzer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615ffbb61aa3d38170cfe80970536b6d7db5589a569ab5033ac08d7eb7cefc55. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199283716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526c1f1c6e8578f6ee034f64f142b035ab78845a2599485e8d211b8440db9532. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199283717.
Variazioni di bravura, on Caprice No. 24
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22817c87ca7782f4910deb4df50082c1807f1b87883f42be8a72a98a908a2ad. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199283718.
Bach: Violin Concerto No. 1 In a Minor, Bwv 1041. Allegro
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Bach: Violin Concerto No. 1 In a Minor, Bwv 1041. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51ff21ef162259e6c59b9c5e3767fff316d71b0dc70a1c529fe7dd55d07bc80. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA561044706.
Bach: Violin Concerto No. 1 In a Minor, Bwv 1041. Allegro Assi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9104bcf1379f43993811cb7b913c70444d654c872c90ca0b256ee8e1cafe7ad1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA561044707.
Vivaldi: Violin Concerto No. 1 In G Minor, Op. 12, Rv 317. Allegro
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Vivaldi: Violin Concerto No. 1 In G Minor, Op. 12, Rv 317. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2713a7b1af3993353c5a43f77fd54f4ac16922d9b45050dcc8de087d1728c02. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA561044709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3f68c205f46d7e9e9acccba68beec3bc422931f4512d5a558e776042f1d30f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA561044710.
Vivaldi: Violin Concerto No. 6 In a Minor, Op. 3, Rv 356. Allegro
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Vivaldi: Violin Concerto No. 6 In a Minor, Op. 3, Rv 356. Largo
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Vivaldi: Violin Concerto No. 6 In a Minor, Op. 3, Rv 356. Presto
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Bach: Violin Concerto No. 2 In e Major, Op. 3, Bwv 1042. Allegro
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Bach: Violin Concerto No. 2 In e Major, Op. 3, Bwv 1042. Adagio
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Bach: Violin Concerto No. 2 In e Major, Op. 3, Bwv 1042. Allegro Assai
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8902649c84124a1f69a06dbdcbe691e4423737b4eddfecea99c096f7885efc2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA561044717.
Handel: Water Music, Overture; Largo; Allegro
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7cf40f56a3627c1454c2dcaa9db3e27f66e42fa6bbc86118ee3b0a4ef5855f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA561044719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8418f7a9aa5fa8ef7ea0b06200fef65238fbf6d0f89e3b086e7344d57eb2ef3. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:20:07Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA561044720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b0955a7485872991614b72415479cb3fcdb3e8c2f60a788c7117fd960e9513. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:09:28Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA561044721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67b58c933417fc722a1a0ac84860d2f1c639af92d4b6dcb6b0ce87694328f05. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA561044723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0623a2879a4a110539d285eeb49df3eea02d9513b15aae39dc5b8d90cd66ee3b. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA561044724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c4334a45db0a3b78c8cefd4a8f2571a0a0cdae217876834b2cace828ad5a92. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:54:59Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA561044725.
Bach: Concerto In A Minor for 4 Pianos, Bwv 1065. First Movement
Alexander Tamir, Arie Vardi, Bracha Eden & Pnina Salzman
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Bach: Concerto In A Minor for 4 Pianos, Bwv 1065. Largo
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Bach: Concerto In C Major for 2 Pianos, Bwv 1061. Adagio Ovvero Largo
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Bach: Jesu, Joy of Man's Desiring, from Cantata 147
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Passion/Romance: Narada Classic Collections
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Christmas Blessings (The Narada Christmas Collection)
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Cantata, BWV 147, "Herz und Mund und Tat und Leben", Part 1: VI. Chorale: Wohl mir, dass ich Jesum habe
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