thumb|Koch (far left) in the apartment of Shafarevich (right), with Fyodor Bogomolov, A. N. Todorov Helmut V. Koch (5 October 1932 – 12 November 2024) was a German mathematician who specialised in num
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 0x91b583137bc8813494b2fe557d90124edfa62520481a2352fa16e694259bb7ee. 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/adbcbdbf-0774-4d70-85ef-10972d65eb18.json and https://artists.proofprofile.net/proofs/artist/adbcbdbf-0774-4d70-85ef-10972d65eb18.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Gluck, Mozart, Bach, Haydn, Vivaldi, Viotti, Händel: Sensitive Sounds
Mozart, Brahms, Chopin, Cimarosa, Ravel, Beethoven, Vivaldi, Haydn & Telemann: Sounds for the Soul
Bach, Mozart, Brahms, Grieg, Ravel, Satie, Debussy & Sibelius: Unfold your Mind
Handel: Judas Maccabaeus (Sung in German)
Judas Maccabaeus, HWV 63: Part I: "Klagt, ihr gebeugten Kinder"
Solistenvereinigung des Berliner Rundfunks
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 0x1974289da9fb0c3520044e5f1541ae9f6e2834c789723a1612869df71caa4703. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/DES380008153.
Judas Maccabaeus, HWV 63: Part I: "O Vater, des allweise Macht"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc6275792831eeee776e2e001b371f3b72665e99167a5a52d7fc17cd3b954dd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DES380008159.
Judas Maccabaeus, HWV 63: Part I: "Wohlan, wohlan, wir stehn gereiht"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31caa931dfd1630d0070e531e3cd5e30d3c7fe7ba9d0f035d62ded6475e2ca7f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES380008162.
Judas Maccabaeus, HWV 63: Part I: "Hör uns, o Herr"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d178e636beb283e06901fbe8d0c45676c5122beb1fe3212621166ea953ffea. 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/DES380008176.
Judas Maccabaeus, HWV 63: Part II: "Fall ward sein Los"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d7c0eed891dc7ed0074049039a2348b7b1d5bebb515d97937e082f19b119bc. 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/DES380008177.
Fantasia C Minor, Op. 80, "Choral Fantasy"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2062d3989278f0932e22bfafeb3de3dbe961e46fcfa087626fe71604b04f7a75. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/DES380007454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc5e65d651b857cddf67dda97483cc757052ed0ae311a2f9ea39255761df2db. 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/DES380007455.
Bundeslied, Op. 122, "In allen guten Stunden"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38c283e03a4ab5103adac5cc2764e379cac97c0043a953b51fceb3facf1a976. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES380007456.
Opera Arias (Tenor): Schreier, Peter -Wolfgang Amadeus Mozart/ Otto Nicolai/ Georg Friedrich Händel / Richard Strauss / Gioacchino Rossini/ Albert Lortzing/ Claudio Monteverdi/
W. A. Mozart & L. Mozart: Toy Symphony, a Musical Joke
Cassation in G Major 'Toy Symphony': I. Allegro
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Cassation in G Major 'Toy Symphony': II. Menuetto
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Cassation in G Major 'Toy Symphony': III. Finale. Allegro
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Divertimento in F Major 'Musical Sleigh Ride': No. 3, Die Schlittenfahrt. Allegretto
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Divertimento in F Major 'Musical Sleigh Ride': No. 4, Das Schütteln der Pferde. Largo
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Divertimento in F Major 'Musical Sleigh Ride': No. 11, Der Kehraus. Allegro
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Sextet in F Major 'A Musical Joke', K. 522: I. Allegro
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Leopold Mozart: Kindersinfonie / Die Bauernhochzeit / Die musikalische Schlittenfahrt
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b43ad48bc1206775ea826dd20c96b4f3b2ae9a891e110374cccf98670720627. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES380000214.
Toy Symphony in C Major: III. Finale: Allegro
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Divertimento in D Major "Peasant Wedding": I. Marcia villanesca
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Divertimento in D Major "Peasant Wedding": II. Menuet
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Divertimento in D Major "Peasant Wedding": III. Andante
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Divertimento in D Major "Peasant Wedding": IV. Menuet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfba18e1c2a69f1de86b5d163f3018b28a65f554d60170656fe802e0ab5e9248. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES380000219.
Divertimento in D Major "Peasant Wedding": V. Finale: Molto Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5692e7a6d720b29c3cf4d36e0f8ed2baf88267a9b3df2921f25a88d148f1a499. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/DES380000220.
Divertimento in F Major "Musical Sleigh-Ride": No. 1: Overture. Resolutum - Allegro Maestoso
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Divertimento in F Major "Musical Sleigh-Ride": No. 2: Confusion in the Stables - Allegro - Die Verwirrung in den Ställen
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Divertimento in F Major "Musical Sleigh-Ride": No. 3: The Sleigh-Ride - Allegretto - Die Schlittenfahrt
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Divertimento in F Major "Musical Sleigh-Ride": No. 4: The horses shaking themselves - Largo - Das Schütteln der Pferde
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Divertimento in F Major "Musical Sleigh-Ride": No. 5: Procession March - Marsch - Aufzug: Marsch
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Divertimento in F Major "Musical Sleigh-Ride": No. 7: Procession March - Marsch - Aufzug: Marsch
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Divertimento in F Major "Musical Sleigh-Ride": No. 8: The Sleigh-Ride - Allegretto - Die Schlittenfahrt
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Divertimento in F Major "Musical Sleigh-Ride": No. 9: A Lady shivering with cold - Andante - Das vor Kälte zitternde Frauenzimmer
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Divertimento in F Major "Musical Sleigh-Ride": No. 10: The Start of the Ball - Menuett - Des Balles Anfang
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Divertimento in F Major "Musical Sleigh-Ride": No. 11: The last Dance - Allegro - Der Kehraus
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Divertimento in F Major "Musical Sleigh-Ride": No. 12: The Sleigh-Ride - Allegretto - Die Schlittenfahrt
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My Heart is Inditing, HWV 261: II. King's Daughters Were Among Thy Honourable Women
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My Heart is Inditing, HWV 261: IV. Kings Shall Be Thy Nursing Fathers
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Let Thy Hand Be Strengthened, HWV 259: I. Let Thy Hand Be Strengthened
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Let Thy Hand Be Strengthened, HWV 259: III. Allelujah!
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The King Shall Rejoice, HWV 260: IV. Glory and Great Worship Hast Thou Laid Upon Him
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Dettingen Te Deum in D Major, HWV 283: I. Chorus. "Herr Gott! Dir sei Lob!"
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Joseph Haydn: Schopfung (Die) (The Creation)
MENDELSSOHN, Felix: Piano Concerto in A Minor (Stockigt, Berlin Radio Symphony, Kegel) / Violin Concerto in D Minor [Schmahl, Berlin Chamber, Koch]
Händel: Water Music & Music for the Royal Fireworks (KulturSpiegel - Eterna - Über Grenzen hinaus)
Haydn: Die Schöpfung (Schätze der Klassik)
Brandenburg Concerto No. 1 in F Major, BWV 1046: I. Allegro non troppo
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Brandenburg Concerto No. 1 in F Major, BWV 1046: II. Adagio
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Brandenburg Concerto No. 1 in F Major, BWV 1046: III. Allegro
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Brandenburg Concerto No. 1 in F Major, BWV 1046: IV. Menuetto - Trio - Menuetto - Polacca - Menuetto - Trio - Menuetto
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Brandenburg Concerto No. 2 in F Major, BWV 1047: I. Allegro
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Brandenburg Concerto No. 2 in F Major, BWV 1047: II. Andante
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Brandenburg Concerto No. 2 in F Major, BWV 1047: III. Allegro assai
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Brandenburg Concerto No. 3 in G-Dur, BWV 1048: I. Allegro
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Brandenburg Concerto No. 3 in G Major, BWV 1048: II. Adagio
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Brandenburg Concerto No. 3 in G Major, BWV 1048: III. Allegro
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Brandenburg Concerto No. 4 in G Major, BWV 1049: I. Allegro
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Brandenburg Concerto No. 5 in D Major, BWV 1050: I. Allegro
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Messiah, HWV 56: No. 42, Chorus "Hallelujah!"
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Der Messias, HWV 56: 1. Teil, No. 13: Sinfonia pastorale
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Mass No. 11 in D Minor, Hob.XXII:11, "Nelson Mass": Kyrie
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Mass No. 11 in D Minor, Hob.XXII:11, "Nelson Mass": Gloria: Quoniam tu solus sanctus
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Mass No. 11 in D Minor, Hob.XXII:11, "Nelson Mass": Credo: Et incarnatus est
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Mass No. 11 in D Minor, Hob.XXII:11, "Nelson Mass": Sanctus
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Mass No. 11 in D Minor, Hob.XXII:11, "Nelson Mass": Sanctus: Benedictus
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Mass No. 11 in D Minor, Hob.XXII:11, "Nelson Mass": Agnus Dei: Dona nobis pacem
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Händel: Water Music Suite Nos. 1-2 & Music for the Royal Fireworks
Water Music Suite No. 2 in D Major, Hwv 349: II. Allegro. Alla Hornpipe
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Bach: Orchestral Suite No. 4 & Brandenburg Concertos Nos. 1-3
Orchestral Suite No. 4 in D Major, BWV 1069: I. Overture
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Brandenburg Concerto No. 1 in F Major, BWV 1047: I. Allegro
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Bach: Brandenburg Concertos No. 4, 5 & 6 (Schätze der Klassik)
Vivaldi, Nardini & Viotti: Italian Violin Concertos
Berühmte Trompetenkonzerte des 18. Jahrhunderts
Georg Friedrich Händel: Oratorio Choruses
Judas Maccabaeus, HWV 63 (Sung in German): Part III: Seht den Sieger
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Semele, HWV 58: Act II: Chorus: Now Love that everlasting boy invites (Sung in German)
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Jephtha, HWV 70: Act III: Doubtful fear and reverend awe (Sung in German)
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L'Allegro, il Penseroso ed il Moderato, HWV 55: Part I: Aria: Haste thee, nymph
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Carl Philipp Emanuel Bach: Vier Orchester-Sinfonien
Beethoven: Zwölf Contretänze / Elf Mödlinger Tänze / Sechs ländlerische Tänze / Zwölf deutsche Tänze
12 Contredanses, WoO 14: No. 8 in C Major - Remastered
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Requiem in D Minor, K.626: Requiem: Introitus - Kyrie: Adagio
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Requiem in D Minor, K.626: Dies Irae: Allegro Assai
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Requiem in D Minor, K.626: Rex Tremendae: Grave
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Requiem in D Minor, K.626: Lacrimosa: Larghetto
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Overture No. 3 in D Major, BWV 1068: II. Air
Die 50 Klassik-Hits zum Entspannen - Mondscheinsonate - Schwanensee - Symphonie Fantastique - Blumenstück
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