Chiara Margarita Cozzolani (27 November 1602 – ca. 1676–1678), was a Baroque music composer, singer and Benedictine nun.Carter, Tim. "Cozzolani, Chiara Margarita." The Oxford Companion to Music. Ed. A
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 0xb10bbe07631a740e6e598ce1d15cb04266c0aef314617377c1878233dabdffc0. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81a32f45-861d-4be0-81b6-124f311e70c1.json and https://artists.proofprofile.net/proofs/artist/81a32f45-861d-4be0-81b6-124f311e70c1.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Monteverdi & Gabrieli & Cozzolani: Vesperae in nativitate domine
Get Into the Now: III. Go Big or Go Home
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 0x1ee62cb7b60a6406175da37d881907aceb6f6720ff0300a248b2b2ae71a3af2f. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZAQT1900003 — a six-check JSON result.
Feelin Good - from PUBLIQuartet's Nina!: Mind The Gap
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a6aa1c8e42358e2a6b02cea91fcbca0c8b98f9333bbfa6b0a0e37583bf6f18. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZAQT1900009 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba14dea0a18d62a1b5d4d63624bd012eacad8abbd6f8c7cb9e104f1f58d03a99. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZAQT1900012 — a six-check JSON result.
Angels & Shepherds: A 17th Century Christmas
Musae Sioniae, Theil 6: No. 53. Es ist ein Ros entsprungen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e28d47fb581a7572f63275993896fd5cecf2365db68931ae8ddeec2a2ca20f. 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/NLA460711633 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa5a5aa623c1b941e341f358ba26205c69b69f306fbbbfb6ee412468a7312b6. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/NLA460711638 — a six-check JSON result.
Christmas Oratorio, BWV 248, Pt. 6, Cantata for the Feast of Epiphany: No. 59. Chorale, "Ich steh an deiner Krippen hier"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9080b837f68064c3db0fe4cfa48b4eeb9f2cbaac06b9508f11aee6b68a01ec66. 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/NLA460711647 — a six-check JSON result.
Rosa Mistica - Musiche delle monache lombarde del Seicento
Sacri concerti de motetti: O superbi mundi machina
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4efacde8f7e575176106fa6e789ee4dad0714ee22096f3ff30c27dc529c013. 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/ITD551012301 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fa74a4f66b5a9dffe3ce0fcc9c6a27ee5016b8b86d1831a3c356874d6cd222. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-07T15:21:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITD551012302 — a six-check JSON result.
Motetti con le litanie della Beata Vergine, Op. 10: Ave Regina Coelorum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da14c16ed8fa1915d6589ce6945dbc109aa47ee612f546bea59914f3865684c. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ITD551012303 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8699152ebeda5523ddc6f2c814f533c923404fd4a87614940a80e79236a2bcf0. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ITD551012304 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4711d69026615fb66f8bd21bc6cce21e165c21c58940d9e159c80e8a619ea123. 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/ITD551012313 — a six-check JSON result.
Soror mea, sponsa mea: Il Cantico dei Cantici nei conventi italiani tra Cinquecento e Seicento
Earthly Angels: Music from 17th Century Nun Convents
Scintillate amicae stellae - Il Natale nei conventi italiani tra Cinquencento e Seicento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebfdfa9c66d135466cd15c1732568a3bd68fd96ef873a4098e1a9a3b0d2fd80. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/FR9W11904021 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ff84713f21989c52543fcfeb00462d9086a9d8c8ba3d536f7d48d74ab20f8c. 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/FR9W11904022 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1771d78b8c55c6b0fd077eebe2ed31fe1c5b1e9685c8fb8518a14762700d8f4b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W11904023 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120e7670eee30584a724483ffc8754d1d967813d8db251856218f7bbcb9d0c05. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/FR9W11904025 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8ad52a87ce50061a7a799d923a4f1712af68fff8e00a654c6890e7ee2b1bb4. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/FR9W11904026 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8847aad1d6d8f1a7ce88d97965c2d7bfc03a4dd17e12867d30e357883938dad4. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/FR9W11904027 — a six-check JSON result.
Cozzolani: Complete Works, Vol. 2 (Concerti Sacri)
Cozzolani: Complete Works, Vol. 1 - Salmi a Otto Voci Concertati (1650)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3e6f422e1137fb0c865768f07b2d439ed6dbca88e82f2d0f07da34272b9f86. 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/USG3R1010173 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558280544d78cf50ae08784ddc53f4f92c278e077a862207e48ffd1153cdf8d2. 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/USG3R1010179 — a six-check JSON result.
Maria Xaveria Perucona & Chiara Margarita Cozzolani: Psalmen und Motetten aus italienischen Konventen (Gaude, Plaude!)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fa9a2762240e9bc65488da9c5e16d958d7f9cbe1b191a5c8c1ae9f241adfd7. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USG3R0610122 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaacd927baf6d95ffd8c9ce39f312c5d634a5cfbaf5562b99f2ac8ca0a935b1ea. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USG3R0610135 — a six-check JSON result.
Chiara Margarita Cozzolani: Marienvesper
Marienvesper - Versiculus et Responsorium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77591618a19b2843e3ffd468a280a3ce2c7d361cf6438ce4defeab6526091ec. 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/DEC290246101 — a six-check JSON result.
Marienvesper - Psalmus 109. Dixit Dominus à 8
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdb98a28c1478e495a42487d2275f7dca9ec4cdd3d222a38c4cb06898894bf3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC290246103 — a six-check JSON result.
Marienvesper - Concerto. O Maria, tu dulcis à 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3789f6c139c1602bfb8c15d2f4431715a1c9467865db17b21b94a93ae100a4a9. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC290246107 — a six-check JSON result.
Marienvesper - Psalmus 121. Laetatus sum à 8
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81d7d141a4fe3120f9fa32aab756b019c82bb1630d2367cedd3c75c87768c2f. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/DEC290246109 — a six-check JSON result.
Marienvesper - Magnificat. Magnificat anima mea Dominum à 8
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82f2b26d9aa29235cf2236b28e99ea1e49732ccee00cf7d944333245ccf9554. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC290246124 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2314561fd4b1118420d238c450607e2468bc50495f0a63cd7c1432abe7b53675. 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/QMDA61880153 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eeceee639559d3cada2004796277545827f2845945663fe5e6de165c6e4ea4e. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/QMDA61880154 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5feb7cc51b7a2bcdee89d0f45a707be129d1495dd694de8be7931787883c34af. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QMDA61880160 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b5c798a24f8a943c86c18f5d79a015c6a9563bcca4a6828da112feffecb747. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QMDA61880161 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157310f5342c41d72367905fd820df70af5923827d6493517b2d61476a076242. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QMDA61880162 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbb1a52e493ac38fb69c20aacb91a70c7901a60bb991d4287fe6069b892aefd. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA61880164 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958fa8dc92067d43e51c3cfeb945246c1c254b3805b26cbdbaf208cb48626a8c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA61880165 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f7f8aae106c20c4801002cdb76cc00ccd698485c6416b2e03f38a1ff1512c6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA61880166 — a six-check JSON result.
Componimenti musicali: O magnum mysterium (Venice 1623)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74df6bacd0b7929c301270817b375a6762e3f612c984ea2b21be07f828145e7. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/NLY331401902 — a six-check JSON result.
2013 Florida Music Educators Association (FMEA): All-State Men's Chorus & All-State Women's Chorus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd504034ba492f8b93112b7ead699c217fe815d868982cb0f9c878167aed2391. 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/USHM92418860 — a six-check JSON result.