Domenico Mazzocchi (baptised 8 November 1592 in Civita Castellana21 January 1665 in Veja) was an Italian Baroque composer of vocal music, of the generation after Claudio Monteverdi. He was a Roman la
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 0x67501716974e393d3a9619e80a5683692f36992271d6fef46215125c3db65cc9. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a77fc91-b85e-4378-8667-9298c429bb79.json and https://artists.proofprofile.net/proofs/artist/6a77fc91-b85e-4378-8667-9298c429bb79.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 0x8e0c547f70dd922ef31be2ecaf0400c326995757759103697f245e19bfbdeb13. 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/BER181110202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b8fbdad4ae882909ed793bbe887b6629a94f4e0159095ce248f4ac8a038838. 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/BER181210611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdab5885cc9b20c1b5a6135e0b865ffd38806e6096ef5cedfd2d49b269f089f6. 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/BER181132022.
Libro primo dei Madrigali: Oh se poteste mai, luci adorate
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352e3a24e789f779cba69307d746319f26b6f81df225eb6bfee55e7fc5d05589. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/BER181132006.
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
Maria Maddalena, Terza parte: XIII. Se nutri di speranza
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bda47108a51da6ebcfa3ca0e7ff5ebc01de23d70888ccefcfaf0221b0c8da51. 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/BER181536730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf82f0b1916d03c233e4c516fdfb417a2d2b968af53a8871b698595aec0d1edb. 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/BER189522201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c41b20222d24da7d3f3ae4b515f5fe96bf0559049f82e3995cbdb9beb0fa257. 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/BER189522214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1131233d75e1f5e378ab151d5d3de503426686292c42a938163fbbe149913977. 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/ES59G2141303.
What Artemisia Heard: Music and Art from the Time of Caravaggio & Gentileschi
Dolente partita. Madonne e Maddalena (Works by Monteverdi and His Contemporaries)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf699d3c14c603bb365864c8875b110b97955b577b909ba6e5701853dcf1797. 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/USKC61113102.
Folia [Biblioteca Nacionale in Madrid, 17th Century]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d8e04a0d4d2a79f520f7b4e2d1d0f78f84920a9e4b985b3a3cbe51a5f71a61. 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/USKC61113108.
Anon : Canzonette spirituali, e morali [1677] : Ciaccona di Paradiso, e dell'Inferno - "O che bel star è star in Paradiso"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56e99c9124734e8fe0d4221e80f6e05a59c337d5271e1859a630a6b13f7fea6. 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/DEA809504101.
Prima le parole: Partitura de' madrigali a cinque voci
Tailleferre: Revived Piano Works, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ce296826c26b6b8fe5b6126d6db2cec0eb857b395253264fc616a991c00ffc. 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/HKI192145904.
La naissance de Vénus, LWV 27, Pt. 2: Grand dieu des enfers (Arr. G. Tailleferre for Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383bcfe6c9a2b469b51e46753b2986cf7b086ab58ad9482fe0174f11e123eb15. 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/HKI192145909.
Demetrio (Excerpts Arr. G. Tailleferre for Piano): Vorrei dai lacci
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241a7d0fd9c39613e000686b80d9afc429b64d339d8b238fff4bab9df4d50cd2. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/HKI192145917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f37905833b5e4d10b877a889bf6e252372c951900ec1e79e013edab40568b9d. 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/HKI192145939.
Missa "Hodie Christus natus est": 2. Gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fc4a510ac4dbdc0921b83f6f25ff4e20560447a0ffad16320057a0aa0f5412. 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/DEF059204260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746ca885f2726ab8fc4ce1df11faacfcbbad7023e7d0915aafe01c6da5b571c8. 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/DEF059204330.
Rossi, Mazzocchi, Carissimi: Il tormento e l'estasi
Foolish Heart: Madrigals for Three Sopranos
Un'Arpa Straordinaria: Italian Music of the 17th Century for Double Harp
Frescobaldi, Carissimi, Landi, Mazzocchi, Giamberti, Kerll: Musica al tempo di Pietro da Cortona - 17th Century Music in Rome
Utopia (La fantaisie des madrigaux de la Renaissance tardive)