Isabella Leonarda (6 September 1620 – 25 February 1704) was an Italian composer from Novara. At the age of 16, she entered the Collegio di Sant'Orsola, an Ursuline convent, where she stayed for the re
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 0x59bb4445a74473986e5f5cba448e9fe5b07e359378f8156ac7be49386c381baf. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e0c3668-a920-4700-b307-a7551b8c3c78.json and https://artists.proofprofile.net/proofs/artist/8e0c3668-a920-4700-b307-a7551b8c3c78.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xeba76b7ab6fe4123bebf5d588096c8c8b760ccbc043e6293e715d2ac8cdb99a4. 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/NOEHX2117060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbef7ad2795e690bf9a9f97d496623abb464207f41dace69be3e413c1169572b. 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/GBPFW2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99fd3a0251259db7c291feb15eb88e195a942368d4bfe81920e4b3bc6ce4c52. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBPFW2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5f4a840bc93ecccb1aa10085c4272d37d71ddcbb8df39ec0279f8b67055d76. 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/GBPFW2400005.
Leonarda: Nive puer (Excerpts) [Arr. Pluhar]
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Traditional: La canzone di Cecilia (Arr. Pluhar)
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Traditional: La lloroncita (Arr. Pluhar)
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Traditional: Jácara. "No hay que decirle el primor"
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0626a3a8fa53d18fbb3fca4f33b74fe18ebfd8d4801b1b848a28d82865940dc9. 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/GBPFW2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a8af6f4a3f80060d88b2c4a358a9cdc4475b60e9821d007edf6a930dce6387. 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/GBPFW2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1eec75928c5d2c7b00bc0606327edd57793bd187904cce6a28083d37d0e482e. 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/GBPFW2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bfade4f31189e27a6243160ec4e7d5dd361e3c67dd4a9a3a2fdf2bff70626a. 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/GBPFW2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb86f0723d2efb213e9cf55b4fc250071ae3009bcebd91976a12f1cd0b7f8093. 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/GBPFW2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61dba7010c3c8971c891d05876313a60934097a3d3c1e062d64b453cc0cc56a1. 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/GBPFW2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4192a783c17efa9292b189c602239d49966a5b356284ad58ea5f91fb240ae3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBPFW2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7e7019aafa227c17ada74f39a92f44dd65976069af3d9ae6764623b86a0628. 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/GBPFW2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653c9bf96d6bf291c30e9b352290d6e9fdc109018ce44cd3fee1c96f5c5eb854. 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/GBPFW2400018.
Il Canto delle Dame: Compositrices du Seicento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b3dd950a45c0a300c30b274fb8ce1d27a5fdab13303a13eee4ccfcf2bc4de7. 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/FRZDG0900525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6c50146aed0817d3e32d2f7f88a09a8d05fe6c8faf4b37c6efeaca762fc7c1. 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/FRZDG0900528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202e0fb873e03d91ed8e98bfc915aa477e979e8a9b64c2bee8305c52ada17c55. 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/FRZDG0900530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7be09c6aa4dca86b07e1b61d8253b4434c7c7e5adad2699a2e312efd89d427. 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/CALC42021151.
Isabella Leonarda: Pone Spes in Planctu Amaro
Mottetti a 1, 2 e 3 voci con violini, Opera XIII, Op. 13 No. 2 (Excerpts): I. Quam dulcis es quam cara
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb5e9636bac1e0a3a2c4aca20ead4ae1167280c6f41ceda5ce4c8e697de0b31. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBJZY2265501.
12 Sonatas, Opera XVI, Op. 16 No. 1 (Excerpts): II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6aa3f27587d4e674f69aac44c3da1c50fbc36f3e092779547b6e07ab24015fe. 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/GBJZY2265515.
Leonarda: A Portrait of Isabella Leonarda
Leonarda: Sonate a 1, 2, 3 e 4 istromenti, Op. 16
12 Sonatas, Op. 16, Sonata prima: I. Allegro
Cappella Strumentale del Duomo di Novara
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12 Sonatas, Op. 16, Sonata prima: II. Largo
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12 Sonatas, Op. 16, Sonata prima: III. Adagio
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12 Sonatas, Op. 16, Sonata prima: IV. Allegro
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12 Sonatas, Op. 16, Sonata prima: VI. Vivace
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12 Sonatas, Op. 16, Sonata seconda: I. Largo
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12 Sonatas, Op. 16, Sonata seconda: II. Spiritoso
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12 Sonatas, Op. 16, Sonata seconda: III. Allegro
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12 Sonatas, Op. 16, Sonata seconda: IV. Adagio - Allegro
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12 Sonatas, Op. 16, Sonata terza: I. Adagio - Presto - Adagio
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12 Sonatas, Op. 16, Sonata terza: VII. Presto - Adagio
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12 Sonatas, Op. 16, Sonata settima: III. Largo
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7be09c6aa4dca86b07e1b61d8253b4434c7c7e5adad2699a2e312efd89d427. 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/CALC42021151.
Twelve Motteti, Op. 6: V. Ave suavis dilecto, con violini
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Perla Barocca: Early Italian Masterpieces
Sonate, correnti et arie, Op. 4: Sonata overo Toccata V a violino solo detta la Laura rilucente
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Sonate concertate in stil moderno, libro 2: Sonata No. 2. Alegra - Adagio - Alegro - Adagio
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Sonate, symphonie, canzoni, passe'mezzi, baletti, corenti, gagliarde e retornelli, Op. 8: No. 59. Sonata IV per sonar con due corde
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Violin Sonata in D Minor, Op. 4 No. 6 "La vinciolina"
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9743c26e227922255125dc96f5b3737173c775739aa156f0166e5efc98bb1156. 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/NLA460912765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31d3b7d8d7985cd9eef5a1c7e0047c71d5979539da487ae3b8464e3ba3ba200. 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/NLA460912767.
Violin Sonata in D Minor, Op. 16 No. 12: I. Adagio - II. Allegro e presto - III. Vivace e largo - IV. Spiritoso - V. Aria. Allegro - VI. Veloce
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Der Himmel geht über allen auf (Vorchor)
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Rosa Mistica - Musiche delle monache lombarde del Seicento
Sacri concerti de motetti: O superbi mundi machina
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Sacri concerti: No. 13, Hic accipiet benedictionem
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Soror mea, sponsa mea: Il Cantico dei Cantici nei conventi italiani tra Cinquecento e Seicento
Earthly Angels: Music from 17th Century Nun Convents
in Stil Moderno: The Fantastic Style in Seventeenth-Century Italy
Vesperi per l'esaltazione della Santa Croce
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Abondance: Les plus belles musiques à travers les siècles
Scintillate amicae stellae - Il Natale nei conventi italiani tra Cinquencento e Seicento
Chœurs et chorales de France: Noëls classiques
Leonarda: Vespro a cappella della Beata Vergine
O Magnum Mysterium (Italian Baroque Vocal Music)
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Primo Libro delle Musiche: Ch’amor sio nudo
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