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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa8fd62fe9170257e86849e6d748830b97a45071584f4b15db666dc18840a90. Chain 2 (Bitcoin): anchored in block 954032 (2026-06-17T01:59:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3bd0975d-2292-4e0a-afba-42a73e535502.json and https://artists.proofprofile.net/proofs/artist/3bd0975d-2292-4e0a-afba-42a73e535502.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bassoon Concerto in F major, RV.491: 2. Largo
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b127747b1c9f40edf6cf469338d82873dca3e51c8b5b938ba0dc4a7a504d05. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA509401502.
Bassoon Concerto in A minor, RV.499: 1. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f3a7826ee2eeb15d41059f5265c04be167c196cf4547f2d59409f9cdd39f8f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NLA509401504.
Bassoon Concerto in A minor, RV.499: 2. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e09c5ccce2e458d7568aaf80f30f940a43f322de6dccfd60c6fa376655587e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NLA509401505.
Bassoon Concerto in A minor, RV.499: 3. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e6cd29e8ed8e7bbf1a308c320d20e5fe55d1218e4ee3bc198c0e53dcaff414. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/NLA509401506.
Bassoon Concerto in E minor, RV 484: 1. Allegro poco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb824214e7f4a3407975786dd0a65953970103ace98937dfedcf8e3df5956a3f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA509401507.
Bassoon Concerto in E minor, RV 484: 2. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0808a88fd4bc75ff6ef35ca3be007ec09def6013212bac87dbd5a2abbdf609. 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/NLA509401508.
Bassoon Concerto in E minor, RV 484: 3. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb517760f9963bf29fd270b8c5c410b6919771d88a9892ab3069991377932f758. 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/NLA509401509.
Bassoon Concerto in G major, RV.494: 2. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15e239b9bf02f268948aeeb5ac87ed712c886376039a8c4b32a781c0306e50d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA509401511.
Bassoon Concerto in D minor, RV.482: Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd450339dba38b908bd4fabeb448317caa89e02b169b74e1fff52f11691063b4. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA509401516.
Bassoon Concerto in C major, RV.472: 1. Allegro non molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7bc7f70418f7fc1ca57764f00288a2c7be0a1db8d68718dacd9df1f39b94ff. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA509401517.
Bassoon Concerto in C major, RV.472: 2. Andante molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8206e3657700f5147d5f0aa426c2f1160b6b5fd9dfbd2e5ec7c49a86767d302f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLA509401518.
L'arte della viola bastarda (Collection 25ème anniversaire)
Antonio Vivaldi: Sonata in F Major for Recorder and Basso Continuo
Alessandro Santini: Sonata II in D Minor for Recorder and Basso Continuo
Benedetto Marcello: Sonata in F Major for Recorder and Basso Continuo, Op. 2 No. 12
Sonata in F Major for Recorder and Basso Continuo, Op. 2 No. 12: II. Minuet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf648b311477c1f227344758bfa9a30ece540a6cceec8dc7ddd5d5ab2ebc681d1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM6MZ2174987.
Sonata in F Major for Recorder and Basso Continuo, Op. 2 No. 12: III. Gavotta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0fdab275f19deedf96e033a2038353563bf7ee746709de1b1798f335283feb. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6MZ2174965.
Sonata in F Major for Recorder and Basso Continuo, Op. 2 No. 12: IV. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5a20fdbde5660ddce30e9280b9dd3c92c322a0230335a4fff497a9b6531531. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6MZ2174964.
Sonata in F Major for Recorder and Basso Continuo, Op. 2 No. 12: I. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac91970e52ddf0c449c9f051e81018a0fa2d129cdd1c92c011062a0629d8e3b5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM6MZ2174962.
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
Sonata in F Major for Recorder and Basso Continuo, Op. 2 No. 12: V. Ciaccona
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f0c585dc686f61dd64fccb70af5fa622e7ca67302977fc9ba87d54a83ea6e1. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QM6MZ2174989.
Paolo Benedetto Bellinzani: Sonata in D Minor for Recorder and Basso Continuo
Francesco Maria Veracini: Sonata in B-flat for Recorder and Basso Continuo
Anonymous: Sonata in F for Recorder and Basso Continuo
Anonymous: Sinfonia III in F Major for Recorder and Basso Continuo