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 0x6d513c372ed873e12cb4c1b351297f0a00addaad04fccf367b268807ddff85ec. 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/2c184d7a-e9ea-487d-8aa3-427a7956af6d.json and https://artists.proofprofile.net/proofs/artist/2c184d7a-e9ea-487d-8aa3-427a7956af6d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bach - Concertos Brandebourgeois Nº 4, 5, 6
Albinoni - Corelli - Vivaldi - Torelli - Marcello - Monteverdi - Italian Court Composers
Joseph Haydn - Symphonies No 26, 22 and 53 (Lamentatione, De Philosoph, L'Impériale)
Antonio Vivaldi - Concertos on Authentic Instruments
Antonio Vivaldi: The Four Seasons - Concerto grosso D minor
Classical Masterpieces - Johann Sebastian Bach: Brandenburg Concerto No. 6 & Orchestral Suite No. 1
Classical Masterpieces - Johann Sebastian Bach: Brandenburg Concerto No. 3 & Violin Concerto No. 1
Orange Edition - Bach: Organ Sonata No. 4 "Trio Sonata" & Brandenburg Concerto No. 1
Green Edition - Vivaldi: Concerto for 2 Flutes, Op. 47 No. 2 & The Four Seasons "La primavera" - "L'estate"
Red Edition - Bach: Choral works & Violin Concerto, BWV 1042
Red Edition - Bach: Choral works & Toccata and Fugue, BWV 565
Red Edition - Bach: Brandenburg Concerto No. 1 & Toccata and Fugue, BWV 565
Orange Edition - Bach: Brandenburg Concertos Nos. 3, 4 & Orchestral Suite No. 1, BWV 1066
Handel: Music for the Royal Fireworks and Water Music
Blue Edition - Bach: Brandenburg Concerto No. 1 & Orchestral Suite No. 1
Yellow Edition - Bach: Brandenburg Concertos Nos. 3, 4 & Toccata, BWV 916
Red Edition - Bach: Organ Works & Brandenburg Concerti Nos. 5, 6
Red Edition - Bach: "Trio Sonata" & Brandenburg Concerti Nos. 3 & 4
Green Edition - Haydn: "Der Kaffeeklatsch" & "L'impériale"
Classical Selection - Bach: "Italian Concerto"
Blue Edition - Bach: Brandenburg Concerto No. 3, 4 & Violin Concerto, BWV 1042
Green Edition - Bach: Violin Concerto, BWV 1042 & 18 Chorale Preludes
Green Edition - Bach: Das wohltemperierte Klavier I
Green Edition - Bach: Brandenburg Concerto No. 1 & The Art of the Fugue, BWV 1080
Green Edition - Bach: Brandenburg Concertos Nos. 3 & 4
Classical Selection - Bach: Brandenburg Concertos Nos. 3, 4 & 5
The Classical Collection - Haydn - Obras maestras sinfónicas
Bach - Concertos Brandebourgeois Nº 1, 2, 3
Blue Edition - Bach: Brandenburg Concertos Nos. 1,3 & 4
Blue Edition - Bach: Brandenburg Concertos Nos. 1, 5 & 6 - The Art of the Fugue, BWV 1080
Antonio Vivaldi, The Four Seasons - Maestros del Milenio
Concerto No. 1 in E major, Op. 8, RV 269, "La primavera" (Spring): I. 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 0x7806ff92fca7efd612dbc53f0ad62ef5c5af9909321f26339c442cfcc79053ed. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USSJ10813038.
Concerto No. 1 in E major, Op. 8, RV 269, "La primavera" (Spring): II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bbc890c43a10be5e7a75fda06fe61e25c8e2946bdff658932c2f3b2f4be4b4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USSJ10813039.
Concerto No. 1 in E major, Op. 8, RV 269, "La primavera" (Spring): III. Allegro pastorale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6343725f574d6a2e8dbae9ea672ae1809ce095d5b32545d0cabf50c97157f5c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USSJ10813040.
Concerto No. 2 in G minor, Op. 8, RV 315, "L'estate" (Summer): I. Allegro non molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06af6c60f4c15526d4ab90054f12fa2fcc87d64614a088eb577feafa898fa36a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USSJ10813041.
Concerto No. 2 in G minor, Op. 8, RV 315, "L'estate" (Summer): II. Adagio e piano - Presto e forte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6044c923cbea5d3a01885380711b8105a990f7ba729b23d97b21629ce5e40d0. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USSJ10813042.
Concerto No. 2 in G minor, Op. 8, RV 315, "L'estate" (Summer): III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eeeb9b0055aacfedef5bdf5ccda21ae44be9e2cc64c851ce5d48adc7c1f2463. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USSJ10813043.
Concerto No. 3 in F major, Op. 8, RV 293, "L'autunno" (Autumn): I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d211b33be567deaf38d258fb7dbf2aafd3f9a031469259f6b440924fa5c2ad9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USSJ10813044.
Concerto No. 3 in F major, Op. 8, RV 293, "L'autunno" (Autumn): II. Adagio molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7629947b0cc0e3f5137e3b7ee35a5323fccd5dcde0fcd5b9db5dd7a0fc1b1ae4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USSJ10813045.
Concerto No. 3 in F major, Op. 8, RV 293, "L'autunno" (Autumn): III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60250b96119ec889f2d67f1ad7fc2043f72806475545ef7e19030daad4c598c2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USSJ10813046.
Concerto No. 4 in F minor, Op. 8, RV 297, "L'inverno" (Winter): I. Allegro non molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97cbb9d4a0fce321d51f0057d4d17ff86929ad5effe37809199274a28ec3af00. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USSJ10813047.
Concerto No. 4 in F minor, Op. 8, RV 297, "L'inverno" (Winter): II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9dda6596d03006039546bc58144c3052c9fc8c6edb33d0f0fa0a1ae009a8a8b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USSJ10813048.
Concerto No. 4 in F minor, Op. 8, RV 297, "L'inverno" (Winter): III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa688892bf8b0bf7d802bc9a1aa188a9fae9638a739fc26a9c9628a1b13d64771. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USSJ10813049.
Los Grandes de la Musica Clasica - Antonio Vivaldi Vol. 3