1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7ce23b1e5670e7bace6ddf819a2372121a3b329bfc66bf110c029cd1f572c5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a3dd1c6-a7c6-49b3-bf1d-de3cc1dfe244.json and https://artists.proofprofile.net/proofs/artist/7a3dd1c6-a7c6-49b3-bf1d-de3cc1dfe244.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Haydn: Keyboard Concertos, Hob. XVIII:3, 4 & 11
Haydn: Piano Concerto in D Major, Hob. XVIII:11: I. Vivace
Haydn: Piano Concerto in D Major, Hob. XVIII:11: II. Un poco adagio
Haydn: Piano Concerto in D Major, Hob. XVIII:11: III. Rondo all'ungarese
Haydn: Piano Concerto in F Major, Hob. XVIII:3: I. Allegretto
Haydn: Piano Concerto in F Major, Hob. XVIII:3: II. Largo
Haydn: Piano Concerto in F Major, Hob. XVIII:3: III. Presto
Haydn: Piano Concerto in G Major, Hob. XVIII:4: I. Allegro moderato
Haydn: Piano Concerto in G Major, Hob. XVIII:4: II. Adagio
Haydn: Piano Concerto in G Major, Hob. XVIII:4: III. Rondo. Presto
Flute Concerto in B-Flat Major: I. Allegro moderato (1)
Flute Concerto in B-Flat Major: II. Adagio
Flute Concerto in B-Flat Major: III. Allegretto (1)
Flute Concerto in G Major: I. Allegro spiritoso
Flute Concerto in G Major: III. Allegretto
Flute Concerto in B-Flat Major: I. Allegro moderato (2)
Flute Concerto in B-Flat Major: II. Larghetto
Flute Concerto in B-Flat Major: III. Allegretto (2)
Violin Concerto No. 3 in G Major, K. 216: I. Allegro
Violin Concerto No. 3 in G Major, K. 216: II. Adagio
Violin Concerto No. 3 in G Major, K. 216: III. Rondeau: Allegro
Violin Concerto No. 5 in A Major, K. 219, "Turkish": I. Allegro aperto
Violin Concerto No. 5 in A Major, K. 219, "Turkish": II. Adagio
Violin Concerto No. 5 in A Major, K. 219, "Turkish": III. Tempo di menuetto
The Four Seasons: Violin Concerto No. 1 in E Major, "Spring": I. Allegro
The Four Seasons: Violin Concerto No. 1 in E Major, "Spring": II. Largo
The Four Seasons: Violin Concerto No. 1 in E Major, "Spring": III. Allegro
The Four Seasons: Violin Concerto No. 2 in G Minor, "Summer": I. Allegro non molto
The Four Seasons: Violin Concerto No. 2 in G Minor, "Summer": II. Adagio
The Four Seasons: Violin Concerto No. 2 in G Minor, "Summer": III. Presto
The Four Seasons: Violin Concerto No. 3 in F Major, "Autumn": I. Allegro
The Four Seasons: Violin Concerto No. 3 in F Major, "Autumn": II. Adagio molto
The Four Seasons: Violin Concerto No. 3 in F Major, "Autumn": III. Allegro
The Four Seasons: Violin Concerto No. 4 in F Minor, "Winter": II. Largo
The Four Seasons: Violin Concerto No. 4 in F Minor, "Winter": III. Allegro
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1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940f25eab21d8d6daf70fe0ec84d84891b724a42c32b23438b3bfa1b186af2ba. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/02bx1oxZ3JwFNTpkfyVpyZ.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/02bx1oxZ3JwFNTpkfyVpyZ.
Clarinet Concerto, K 622: Rondo ( Allegro )
Horn Concerto No. K 495: Allegro maestoso
Haydn : Piano Concertos Nos 3, 4 & 11 (Apex)
Piano Concerto in F, K413 - Arr. Piano & String Quartet: 1. Allegro
Piano Concerto in F, K413 - Arr. Piano & String Quartet: 2. Larghetto
Piano Concerto in F, K413 - Arr. Piano & String Quartet: 3. Tempo di Menuetto
Piano Concerto in A, K414 - Arr. Piano & String Quartet: 1. Allegro
Piano Concerto in A, K414 - Arr. Piano & String Quartet: 2. Andante
Piano Concerto in A, K414 - Arr. Piano & String Quartet: 3. Allegretto
Piano Concerto in C, K415 - Arr. Piano & String Quartet: 1. Allegro
Piano Concerto in C, K415 - Arr. Piano & String Quartet: 2. Andante
Piano Concerto in C, K415 - Arr. Piano & String Quartet: 3. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62accd194b7ce04902cc78f2f0f195e3b0aa56fbb971597da05c0da2429b457b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6iL1moJKSLBgCyN47DbQcw.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6iL1moJKSLBgCyN47DbQcw.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff2a96bd493023eac63ab9968916cd5d3da9e46177f7687d43f2678ccc55602. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/76PiO53LB0HlJZWJ8Gk6p5.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/76PiO53LB0HlJZWJ8Gk6p5.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0369d2d2cd1fa2d19463e78496e2d18aee9478610615b3959f2a0c20bfd257ec. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5sesfHvztA0yW8H1X7UQX5.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5sesfHvztA0yW8H1X7UQX5.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d26d6bd3cd25e53e60d7d4282bd9e21b4cbbd7e7b22091782211613885e25f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1kSV6Hd5V77JmvJ5sh4pG8.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1kSV6Hd5V77JmvJ5sh4pG8.
Fauré: Requiem, Op. 48: VII. In Paradisum
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Concerto For Violin, Oboe, And Strings In D Minor, BWV 1060 - Arr. For Panpipes From Reconstruction By Max Schneider (1875- 1967): 2. Adagio
Concerto for Violin, Strings and Harpsichord in D Major, RV 209: II. Lento
Brandenburg Concerto No. 5 in D, BWV 1050: 3. Allegro