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 0x359a8507e8d4ed44e15bf00ee8c3f7f64cfec5764b0d4dd03afdd8eb867f444b. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/12a0cb48-7e45-4b4f-9bea-20969a5f4662.json and https://artists.proofprofile.net/proofs/artist/12a0cb48-7e45-4b4f-9bea-20969a5f4662.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Ries, F.: Concerto for 2 Horns, Woo 19 / Violin Concerto No. 1 / Overtures To Die Rauberbraut and The Sorceress
Octet in F-Major, D.803: I. Adagio. 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 0x1adc8b4b7c20593dc1632681149ce1e59998e66d523a2501934233325a82d12e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM1747010 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45efc158f1762c4a6a569f88ec5a07b4834513b679fc11c551ce8dc84fb808d. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM1747020 — a six-check JSON result.
Octet in F-Major, D.803: III. Allegro vivace - Trio
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Octet in F-Major, D.803: IV. Andante - Var. I-VII
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Octet in F-Major, D.803: V. Menuetto. Allegretto - Trio
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Octet in F-Major, D.803: VI. Andante molto - Allegro - Andante molto - Allegro molto
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5 Minuets, D.89: No. 3 (transcribed for octet)
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5 Minuets, D.89: No. 5 (transcribed for octet)
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Sonata for Trumpet and Piano: I. Mit Kraft
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Sonata for Trumpet and Piano: III. Trauermusik, Sehr langsam - Ruhig bewegt - Wie am Anfang - Alle Menschen müssen sterben, Sehr ruhig
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Mozart: Oboe Concerto & Other Works with Oboe
Musique De Table, Production III, I. Ouverture-Suite In B Flat Major For 2 Oboes, Bassoon, Strings and B.C.: Ouverture (Lentement-Presto-Lentement-Presto)
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Musique De Table, Production III, II.Quatuor In E Minor For Flute, Violin, Violoncello and B.C.: Adagio
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Jan Ladislav Dussek: Duos for Harp and Pianoforte
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Sonata IV for cembalo obbligato and violin, BWV 1017: I. Largo
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II. Ich Liebe Den Höchsten Von Ganzem Gemüte Bwv 174, At The 2nd Day Of Whit Sun,am 2. Pfingsttag: Sinfonia (Concerto)
Holland Boys Choir, Netherlands Bach Collegium
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I. Herz Und Mund Und Tat Und Leben Bwv 147, For The Feast Of Visitation,mariae Heimsuchung, Seconda Parte: Choral (Coro), Jesu Bleibet Meine Freude
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Bach Edition Vol. 15, Cantatas Vol. VIII Part: 4
Bach Edition Vol. 14, Cantatas Vol. VII Part: 3
Brahms: Horn Trio; Violin Sonata No. 1; Fantasies Op. 116
Horn Trio in E-Flat Major, Op. 40: I. Andante (Poco più animato)
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Horn Trio in E-Flat Major, Op. 40: II. Scherzo (Allegro - Molto meno Allegro)
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Horn Trio in E-Flat Major, Op. 40: III. Adagio mesto
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Horn Trio in E-Flat Major, Op. 40: IV. Finale (Allegro con brio)
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Violin Sonata No. 1 in G Major, Op. 78: I. Vivace ma non troppo
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Violin Sonata No. 1 in G Major, Op. 78: II. Adagio - Più andante - Adagio
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Violin Sonata No. 1 in G Major, Op. 78: III. Allegro molto moderato - Più moderato
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Punto: Horn Concerto No. 1 in E Major : II. Adagio
I. Wachet Auf, Ruft Uns Die Stimme BWV 140, (1) Coro: Wachet Auf, Ruft Uns Die Stimme
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I. Wachet Auf, Ruft Uns Die Stimme BWV 140, (2) Recitativo (Tenore): Er Kommt, Der Bräutgam Kommt
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I. Wachet Auf, Ruft Uns Die Stimme BWV 140, (3) Aria (Duetto: Soprano, Basso): Wann Kömmst Du, Mein Heil?
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I. Wachet Auf, Ruft Uns Die Stimme BWV 140, (4) Choral (Tenore): Zion Hört Die Wächter Singen
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I. Wachet Auf, Ruft Uns Die Stimme BWV 140, (5) Recitativo (Basso): So Geh Herein Zu Mir
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I. Wachet Auf, Ruft Uns Die Stimme BWV 140, (6) Aria (Duetto: Soprano, Basso): Mein Freund Ist Mein!
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I. Wachet Auf, Ruft Uns Die Stimme BWV 140, (7) Choral (Coro): Gloria Sei Dir Gesungen
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II. Siehe, Ich Will Viel Fischer Aussenden BWV 88, Prima Parte, (2) Recitativo (Tenore): Wie Leichtlich Könnte Doch
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Bach Edition Vol. 19, Cantatas Vol. X Part: 2
II. Lobe Den Herrn, Meine Seele BWV 143, For New Year's Day, Am Neujahrstag: Coro, Lobe Den Herrn, Meine Seele
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Horn Concerto No. 4 in E-Flat Major, K. 495: I. Allegro moderato
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Horn Concerto No. 4 in E-Flat Major, K. 495: III. Rondo (Allegro vivace)
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Bassoon Concerto in B-Flat Major, K.191/186e: I. Allegro
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III. Nun Komm, Der Heiden Heiland BWV 62, (1) Coro: Nun Komm, Der Heiden Heiland
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Bach Edition Vol. 18, Cantatas Vol. IX Part: 1
II. Wie Schön Leuchtet Der Morgenstern BWV 1, For The Feast Of Annunciation, Zu Mariae Verkündigung: Coro, Wie Schön Leuchtet Der Morgenstern
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Bach Edition Vol. 15, Cantatas Vol. VIII Part: 3
Bach Edition Vol. 15, Cantatas Vol. VIII Part: 5
Bach Edition Vol. 19, Cantatas Vol. X Part: 3
Bach Edition Vol. 15, Cantatas Vol. VIII Part: 1
Bach Edition Vol. 18, Cantatas Vol. IX Part: 4
Dauprat, Gallay, Duvernoy & Rossini: Le cor romantique français
Bach Edition Vol. 18, Cantatas Vol. IX Part: 2
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6850cc86b4517d5dfcd1089c0fdca190721cfcd2c077cc097818f53d6cb4c517. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ140716020 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8e21d748b97301b84e50ccff8a7d83cd55423c0ff9d9a11b7166e87062bbe0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ140716030 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9757234925cfdfcfaf56bbba1082c382665275c1805707c4e9603122568c9e4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ140716040 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af9d3315f7baeb60eed8b6f13edb655af52bacf0190a7a2d8b68a42c130d869. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/FRZ140716050 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2241e27fd593dcc21792441b7e6051e9c166421949b91c8249eed89a24bc9ac. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRZ140716060 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72176a3ec69534f2dc87ba55f49de8675847d409f6391bab2d44ca72885adbc. 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/FRZ140716070 — a six-check JSON result.
7 Fantasien, Op. 116: I. Capriccio in D Minor (Presto energico)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac9c3e5ce235b2bbe3d0ae97d13b3f54741ae18b7356d04500ee300b5ef83b0. 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/FRZ140716080 — a six-check JSON result.
7 Fantasien, Op. 116: II. Intermezzo in A Minor (Andante)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02db9d0d7a8da84862a95dbe412067b8525a39b5187188e0c5cca2b877e742e2. 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/FRZ140716090 — a six-check JSON result.
7 Fantasien, Op. 116: III. Capriccio in G Minor (Allegro passionato)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efa1789a290567b8b8275e5c90e33789abc2aa09a5e152e8185ddf41548a593. 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/FRZ140716100 — a six-check JSON result.
7 Fantasien, Op. 116: IV. Intermezzo in E Major (Adagio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50b9738a41851389c6ed5a918d08905c9793fcc7b381439373e343365eb72a5. 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/FRZ140716110 — a six-check JSON result.
7 Fantasien, Op. 116: V. Intermezzo in E Minor (Andante con grazia ed intimissimo sentimento)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf6d7c92788122ba7ab7c67b2fbaab699e8d8dbdf0d999c565b1b8bfb678ee3. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ140716120 — a six-check JSON result.
7 Fantasien, Op. 116: VI. Intermezzo in E Major (Andantino teneramente)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ff27185355e233d29391dcbf09bb90f27f94883aeda7ff8c85f5e9e8f44d0d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ140716130 — a six-check JSON result.
7 Fantasien, Op. 116: VII. Capriccio in D Minor (Allegro agitato)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b0dccfb554dd83be8eb02e9272b284663eca949422c0508408f67afbbccc85. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ140716140 — a six-check JSON result.