Thomas Baltzar (c. 1630 – 24 July 1663) was a German violinist and composer. He was born in Lübeck to a musical family; his father, grandfather, and great-grandfather were all musicians.Holman, Peter.
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 0xde7b998642c661db3bfb1720f4378dd96bffeaf9a618a570952c17b5cfc48089. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/71df5a64-139c-4c62-aedd-64d7884cce9f.json and https://artists.proofprofile.net/proofs/artist/71df5a64-139c-4c62-aedd-64d7884cce9f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Greensleeves to a Ground (Division on "Greensleeves")
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 0x996d783f2f6aef7a6a168f79fab93cbc7522ab454315d405bb84c01dd85d2325. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEBI81946001.
Florish in the Key: The Solo Violin in London 1650-1700
Purcell's London: Consort Music from Charles II to Queen Anne (English Orpheus 23)
Violin Sonata in D Major, Op. 1 No. 13, HWV 371: I. Affetuoso
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Violin Sonata in D Major, Op. 1 No. 13, HWV 371: II. Allegro
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Violin Sonata in D Major, Op. 1 No. 13, HWV 371: III. Largo
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Violin Sonata in D Major, Op. 1 No. 13, HWV 371: IV. Allegro
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Fantasia-Suite No. 8 in D Major: I. Fantazia
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Fantasia-Suite No. 8 in D Major: II. Almaine "La goutte"
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Fantasia-Suite No. 8 in D Major: III. Galliard
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee39949062bbdfec87c61cf08c41876352a9f0363002cad7b0a01547138fba2. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/NLA460915428.
Little Consort in Two Parts for Severall Friends in C minor-major: I. Fantazie
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Little Consort in Two Parts for Severall Friends in C minor-major: II. Pavan
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Little Consort in Two Parts for Severall Friends in C minor-major: III. Ayre
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Little Consort in Two Parts for Severall Friends in C minor-major: IV. Courante
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Little Consort in Two Parts for Severall Friends in C minor-major: VI. Ayre
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Little Consort in Two Parts for Severall Friends in C minor-major: VII. Courante
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Little Consort in Two Parts for Severall Friends in C minor-major: VIII. Saraband
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Sonata in G Minor, Z. 780: I. Adagio - Allegro - Largo - Vivace
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab6f4e5b8998e8a699e3fc015165d00ca3b3151fe9267b6dd462056b6b6ce3f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA460915438.
Fantasia-Suite in A Minor, VdGS group IV, No. 1: I. Fantasia
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Fantasia-Suite in A Minor, VdGS group IV, No. 1: II. Air
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e069e5e74ac75361cc5b19afeef036a0be7429317e120c80e7a413dd996f92f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA460915442.
A Collection of Old Scots Tunes: Lochaber
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A New Irish Tune, Z. 646: "Lilliburlero"
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A Curious Collection of Scots Tunes: Alloway House
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Two Airs for a Violin or German Flute, Violin, Cello & Harpsichord: Auld Bob Morrice. Affetuoso - Allegro
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Chamber Airs for a Violin and Thorough Bass Op. 2, No. 4 in A Minor: I. Preludio. Largo
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Chamber Airs for a Violin and Thorough Bass Op. 2, No. 4 in A Minor: II. Allegro
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Chamber Airs for a Violin and Thorough Bass Op. 2, No. 4 in A Minor: III. Giga. Allegro
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A Violino Solo - Bach, Baltzar, Vilsmayr, Westhoff, Telemann & Biber
Partita No. 5 in G Minor for solo violin from "Artificious Concentus pro Camera": I. Prelude (Harpeggio)
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Partita No. 5 in G Minor for solo violin from "Artificious Concentus pro Camera": II. Gavotte (Allegro)
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Partita No. 5 in G Minor for solo violin from "Artificious Concentus pro Camera": III. Sarabande (Adagio)
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Partita No. 5 in G Minor for solo violin from "Artificious Concentus pro Camera": IV. Rigodon (Allegro)
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Partita No. 5 in G Minor for solo violin from "Artificious Concentus pro Camera": V. Gigue (Allegro)
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Partita No. 5 in G Minor for solo violin from "Artificious Concentus pro Camera": VI. Menuetto
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Partita No. 5 in G Minor for solo violin from "Artificious Concentus pro Camera": VII. Bourre
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Partita No. 5 in G Minor for solo violin from "Artificious Concentus pro Camera": VIII. Retirada (Allegro)
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Fantasy for Solo Violin in D Major, TWV 40:23
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Suite No. 5 for solo violin in D minor: I. Allemande
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Suite No. 5 for solo violin in D minor: II. Courante
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Suite No. 5 for solo violin in D minor: III. Sarabande
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Fantasy for Solo Violin in A Minor TWV 40:25
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Fantasy for Solo Violin in G Major TWV 40:15
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Partita No. 2 in D Minor, BWV 1004: I. Allemanda
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Partita No. 2 in D Minor, BWV 1004: II. Corrente
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Partita No. 2 in D Minor, BWV 1004: III. Sarabanda
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Partita No. 2 in D Minor, BWV 1004: IV. Giga
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Partita No. 2 in D Minor, BWV 1004: V. Ciaconna
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Passagaglia for Solo Violin from "Rosenkrantz Sonaten"
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Sonate, arie et correnti, Op. 3: Aria quinta "Sopra la Bergamasca"
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Ayres for the Violin: Aria spagnuola a due corde
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Ayres for the Violin: Diverse bizzarie sopra la Vecchia Sarabanda ò pur Ciaccona
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The Broken Consort, Pt. 2, Suite No. 3 in D Minor/Major: I. Pavan
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The Broken Consort, Pt. 2, Suite No. 3 in D Minor/Major: III. Galliard
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Sonata in A Major for Two Violins and Bass Continuo: II. Untitled
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Recercada segunda sobre tenores Italianos
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Sonata a 3 violini senza basso: II. Allegro
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La Folia The Division Violin, London 1684
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Canario Instrucción de Música sobre la guitarra española, Zaragoza, 1674
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Tunder, F.: Ach, Herr Lass Deine Lieben Engelein / Reincken, J.A.: Suite No. 6 / Baltzar, T.: Airs
Mystery Rosary Sonatas: Passacaglia In G minor
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Henry Purcell and His Time - 17th Century English Chamber Music
John Come Kiss Me Now - Divisions on a Ground
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'T Uitnement Kabinet: Als Jupiter gedacht
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Beyond Bach & Vivaldi: Rare Unaccompanied Works for the Baroque Violin
Dygd och Ära – Adeln och musiken i stormakts-tidens Sverige / Virtue and Glory – Aristocracy and Music in Sweden’s Age of Greatness
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Music in a Cold Climate: Sounds of Hansa Europe
the Sebastians a 2: Virtuoso Music of the Holy Roman Empire
Bach, J.S.: Violin Partita No. 2 / Biber, H.I.F. Von: Violin Sonata / Corelli, A.: Violin Sonata, Op. 5, No. 12
Forqueray, A.: Suite No. 1 in D Minor / Baltzar, T.: Divisions On A Ground in G Major / Lawes, H.: Among Rosebuds
Forgotten Virtuosi, Violin showpieces from the early 17th century