Barbara Strozzi (also called Barbara Valle; baptised 6 August 1619 – 11 November 1677) was a Venetian composer and singer of the middle Baroque Period. During her lifetime, Strozzi published eight vo
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 0xb410e98884f62764524cb2ed2ec50860233bb12778528a4178a0978604d284d1. 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/e583ba9e-25f5-4974-81e9-472970bfbe18.json and https://artists.proofprofile.net/proofs/artist/e583ba9e-25f5-4974-81e9-472970bfbe18.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Strozzi: Primo libro de' madrigali, Op. 1
Primo libro de' madrigali, Op. 1: Volano frettolosi
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 0x8bc6705926043aba1f19f3c76c761f6a929e3943a8fe48c9a3600ab007491de5. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/MX2831000305.
Primo libro de' madrigali, Op. 1: Quel misero usignolo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4559d2766a082aefdc0aa771965ec146e1c2645853ec2eb17f69920017f843. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MX2831000306.
Primo libro de' madrigali, Op. 1: Quante volte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d01b73ac9075150bd9c625e0f236c665d342b64775648eb89c00657c3bf9f28. 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/MX2831000307.
Primo libro de' madrigali, Op. 1: Dolicissimi respiri
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d6e9022ff73ee90e834abfd30000d6200697e30a64aeac83ad3ff431b23a82. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MX2831000308.
Primo libro de' madrigali, Op. 1: Che dolce udire
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69a3eef0a9b04138855763cb2ad7f404fc56326258478f51f2710be67f49bbc. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MX2831000309.
Primo libro de' madrigali, Op. 1: O soffrire, o fuggire
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09506168cc3e0b511174276a9738e51e64be2517c37a2fbf16abe4ff816c9111. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/MX2831000310.
Primo libro de' madrigali, Op. 1: Bella madre d'Amor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47698cc718d9606ece4ebe449691740f6cd46c202eae459f0f9a78457300e375. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/MX2831000311.
Primo libro de' madrigali, Op. 1: Chi di noi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb271443d76e1a21ed7c23d7234fa56449ad63f45655777c3b52263ab953e6b5. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/MX2831000312.
Primo libro de' madrigali, Op. 1: Vago, instabil
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32633881b4bd4abb62965c232f3194d4ae0334e1bd63bcd19e6f03b9b6a3a458. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MX2831000313.
Primo libro de' madrigali, Op. 1: Mercè di voi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31c78ac75b6ac09747e0c71c49c4d83acfdaf95003df8e6f3bf15701ca70227. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/MX2831000314.
Primo libro de' madrigali, Op. 1: Pietossisimo amore
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c97900298b21cab84694e4b828f2821304970d72ff9c4fced0c3f70ed2b6859. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MX2831000315.
Primo libro de' madrigali, Op. 1: Non ci lunsinghi più
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72bf518a46379f895d7f1469739c2ada94ad2853d07fdbfa0998dca7ea2a9bcf. 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/MX2831000316.
Primo libro de' madrigali, Op. 1: Anima del mio core
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644eaa1b8d846cb3a4c8b7e9be5e4bd0a0b60cdc915b218cb3e046c002fbbd84. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MX2831000317.
Primo libro de' madrigali, Op. 1: Amor, Amor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb88d1250be15d9fea27366ba8a867d39d96ea06ecbcabb0146074d146c09d2. 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/MX2831000318.
Primo libro de' madrigali, Op. 1: Gioisca
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72f20b5417eee2b425dab96173d191551b9f0a326ec7c888245507c85128ffa. 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/MX2831000319.
Primo libro de' madrigali, Op. 1: Come può, non come vuol
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e735ff59d5388f386dce5088fcb7bdb073347e08324ff387564499bea5850ff. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/MX2831000320.
Primo libro de' madrigali, Op. 1: Mi tien Filli
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66ac42ac8e7de0e4f2f11254f95905b272939c411b1f214fc23607353227924. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/MX2831000321.
Her Sonic Realm - The Creative Legacy of Women in Music
Mythology - A Musical Odyssey Through Ancient Legends
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2de5adcad14e1b661719110656c2d208210bd0ca979559be1a397107a5b3675. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USSM11508005.
Fiori musicali: Songs & Dances of the 16th & 17th Centuries
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f05fe8fdabc603eb41d317e4978a244974b1be71123fa941c08acc27a23a209. 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/ITJ092100512.
Cantate, ariette e duetti, Op. 2: No. 14, L'eraclito amoroso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07c70cb7d8bb3d3daff65f10728cfbfb978b71804453c8d5dc503eb224863de. 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/SEAEX1648060.
Diporti di Euterpe, Op. 7: No. 4, Lamento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ef0643a821b68c53e26a999c19056b07e19fa78d85667bc2730e5116532c43. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEX1648110.
A Golden Treasury of Renaissance Music on Original Instruments
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28c0b82413a933db058d00e292486554fbf67197b9e39accd5142691ea10532. 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/GBAJX9706510.