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 0xde68c373321fa71feb6a96313887162cc7c6129e4f44c1352a36e84db1371711. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b53e6a23-4b07-4b28-941c-ccbdf82d4cf8.json and https://artists.proofprofile.net/proofs/artist/b53e6a23-4b07-4b28-941c-ccbdf82d4cf8.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Wachet auf, ruft uns die Stimme Kantate, BWV. 140: IV. Zion hört die Wächter singen
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 0xfa52a142df896835dc9e594ec01eabf840ea8d631e7d3ad7863bbdd5421d2c93. 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/DEA340702307 — a six-check JSON result.
Antonio Vivaldi: Il cimento dell'armonia e dell'inventione, Op. 8 (Stereo Version)
Concerto for Strings in A Major, RV. 158: I Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa244877a8c642209f95026191a8ea51b1d18d7eccad3312465dd333a2c4b5945. 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/GBAYC0703371 — a six-check JSON result.
Concerto for Strings in A Major, RV. 158: II. Andante molto
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Concerto for Strings in A Major, RV. 158: III Allegro
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Violin Concerto in C Minor, RV 198a: I. Allegro
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Violin Concerto in E-Flat Major, RV 253 "La tempesta di mare": I. Presto
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Violin Concerto in E-Flat Major, RV 253 "La tempesta di mare": II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32443067cd75ae0ff83548cdd1a7f52f5aeed24d3128d7297b9c87427a90b82d. 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/GBAYC0704565 — a six-check JSON result.
Violin Concerto in E-Flat Major, RV 253 "La tempesta di mare": III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5e8f08b015cb679afdde4a9ed9cd3e741c209ba864ead8cd5ae1f69a179ced. 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/GBAYC0704566 — a six-check JSON result.
The Four Seasons, Violin Concerto No. 1 in E Major, RV 269 "Spring": I. Allegro
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The Four Seasons, Violin Concerto No. 1 in E Major, RV. 269 "Spring": III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245ebf8d9f8dd0011c001325405bf86ee6f6a83dbf6a8ad196f69b020cef9f6e. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/GBAYC7900178 — a six-check JSON result.
Violin Concerto No. 3 in F Major, RV 293 "Autumn": I. Allegro
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Violin Concerto No. 3 in F Major, RV 293 "Autumn": II. Largo
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Violin Concerto No. 3 in F Major, RV 293 "Autumn": III. Allegro
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Violin Concerto No. 4 in F Minor, RV 297 "Winter": II. Largo
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Violin Concerto No. 4 in F Minor, RV 297 "Winter": III. Allegro
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Violin Concerto in G Major, RV 310: I. Allegro
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Violin Concerto in G Major, RV 310: II. Largo
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The Four Seasons, Violin Concerto No. 2 in G Minor, RV 315 "Summer": I. Allegro non molto
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The Four Seasons, Violin Concerto No. 2 in G Minor, RV 315 "Summer": II. Adagio
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The Four Seasons, Violin Concerto No. 2 in G Minor, RV 315 "Summer": III. Allegro
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Violin Concerto in A Major, RV 345: I. Allegro
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Violin Concerto in A Minor, RV 356: I. Allegro
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Concerto for 2 Violins in A Minor, RV 522: III. Allegro
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Concerto for 4 Violins in E Minor, RV 550: I. Andante
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Concerto for 4 Violins in E Minor, RV 550: II. Allegro assai
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Concerto for 3 Violins in F Major, RV 551: II. Andante
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Concerto for 3 Violins in F Major, RV 551: III. Allegro
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The Four Seasons, Violin Concerto No. 2 in G Minor, RV. 315, Op. 8 No. 2 'L'estate/ Summer': III. Presto
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Violin Concerto in E-Flat Major, RV. 253, Op. 8 No. 5: I. Presto
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Violin Concerto in C Major, RV. 180, Op. 8 No. 6: I. Allegro
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Violin Concerto in E-Flat Major, RV. 253 'La tempesta di mare': II. Largo
Violin Concerto in E-Flat Major, RV. 253 'La tempesta di mare' Op. 8 No. 5: III. Presto
Violin Concerto in B-Flat Major, RV. 362 'La caccia': I. Allegro
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Orchestral Suite No. 3 in D Major, BWV 1068: II. Air
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The Carnival of the Animals, R. 125: XIII. The Swan
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Vivaldi: Il cimento dell'armonia e dell'inventione, Op. 8 (Mono Version)
Vivaldi: L'estro armonico (Stereo Version)
Vivaldi, Valentini & A. Scarlatti: Concerti (Mono Version)
Corelli: Concerto grosso No. 4 in D Major, Op. 6 - Clementi: Symphony No. 2 in D Major, Op. 18 (Mono Version)
Vivaldi: The Concerto Album - The Four Seasons & L'estro armonico
Vivaldi: L'estro armonico, Violin Concerto in D Major, Op. 3 No. 9, RV 230: III. Allegro
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Vivaldi: L'estro armonico, Concerto for Four Violins in E Minor, Op. 3 No. 4, RV 550: III. Adagio
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Vivaldi: L'estro armonico, Violin Concerto in A Minor, Op. 3 No. 6, RV 356: I. Allegro
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Vivaldi: The Four Seasons, I Musici vs. Virtuosi di Roma (Compare 2 Versions)
Gloria in D Major, RV 589: I. Gloria in excelsis Deo (Chorus)
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Orchestre de chambre Jean-François Paillard
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Zadok the Priest, HWV 258: Zadok the Priest
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Cantata No. 51, BWV. 51: Aria, Jauchzet Gott in allen Landen!
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Wir danken dir, Gott, wir danken dir, BWV 29: I. Sinfonia
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Flute Sonata in E-Flat Major, BWV 1031: II. Siciliano
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Concerto for 2 Mandolins in G Major, RV 532: I. Allegro
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Vivaldi: Concerto in G Major, Concerto in C Minor
Concerto in G Major for Two Mandolins, Strings, and Continuo, Op. 21/11: II. Andante
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The Four Seasons, Violin Concerto No. 3 in F Major, RV 293 "Autumn": II. Adagio molto
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Sonata in D Minor, Op. 1 No. 12 'La Follia': I. Adagio
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