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 0x1ca518c3b32ecfeb41c4e6fcdc8df8d849e8210324ab2b74717f078174f81a56. 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/42f518f4-0850-4d8a-85e1-8875083f8092.json and https://artists.proofprofile.net/proofs/artist/42f518f4-0850-4d8a-85e1-8875083f8092.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vivaldi: Concerti per violino, Vol. 7. Per il castello
Violin Concerto in B Minor, RV 389: I. Allegro poco
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 0x8cda03aaa8644ce5922d2495fef786e817be0cc282d3c7cb2c578ebb5413e765. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ131911010.
Violin Concerto in B Minor, RV 389: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b069435fad4e88b0dee729ad6e07d39e275f90965c1d004a39e6464a69cae7. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/FRZ131911020.
Violin Concerto in B Minor, RV 389: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa031a4beefa8ff3d0fdfeaf1b86095df75ed928d65362f39001fb24038e29d89. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRZ131911030.
Vivaldi: Concerti per archi III e concerti per viola d'amore
Concerto for Strings in B-Flat Major, RV 167: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fc73470889fa41eef7a083cd1524ff2a07e3e8e07abaf6f5b29d07c60174a3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRZ131801010.
Concerto for Viola d'amore in A Minor, RV 397: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa484de77a7c438ca1e10063e9fd15fab5c231c3145fc86dd8901c2e4d2a64e2e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ131801460.
Concerto for Viola d'amore in D Minor, RV 393: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3390fc2a62ff6626a49c21637f95aed5ab50748bf90f66367019b289151eb110. 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/FRZ131801490.
Concerto for Strings in G Minor, RV 155: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73777c650caf9bd29e0c8901e7e3c7c3fbc3d8bea010bd2ef108ce6623f29a7. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ131801260.
Concerto for Strings in G Minor, RV 155: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbb58453ed22b39a826bc48bac67760f19693808506cf307a1577c8bbb37fca. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ131801280.
Il trionfo della divina Giustizia ne' tormente e morte di Gesù Cristo: Ouverture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb470436c5bbe73bd82a00c99c522ba5dfe5cd64ec0a69739f52ff636746f6ef5. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ132218010.
Il trionfo della divina Giustizia ne' tormente e morte di Gesù Cristo: “Per pietà, turba feroce”
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14055bedd52b3b60c4ca37e90f46a31efa4e253760a802b956eac8885b0cc8c3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ132218030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b47d4c53ea87d00fa9ddf00f561e65d8fde8cb77ae9de867534ea0e22ed986. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ132218040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248c9ccee2fc0f4bed3376d1b99e2d744a54778e253913902d6032a79d6530b7. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ132218090.
So Far, So Close: Music for Baroque Violin and Accordion
Haydn: Divertimenti per il pariton a tre
Pergolesi: 1. Allegro (from Violin Concerto in B-Flat Major)
Vivaldi: Quis est homo (from Stabat Mater in F Minor, RV 621)
Corelli: Concerto Grosso in B-Flat Major, Op. 6 No. 11
Corelli: Concerto Grosso in C Major, Op. 6 No. 10
Corelli: Concerto Grosso in F Major, Op. 6 No. 12
A. Corelli: Concerto Grosso Op. 6 No. 3 in C Minor
Vivaldi, Estro Armonico - Concerto Op. 3 N. 10 - Allegro
Concert No. 7 in B-Flat Major, HWV 325: V. Hornpipe
Violin Concerto in E-Flat Major, RV 257: III. Presto
Violin Concerto in E-Flat Major, RV 257: II. —
Violin Concerto in E-Flat Major, RV 257: I. Andante molto e quasi allegro