Musica Secreta is a British vocal ensemble that was founded in 1991 by soprano Deborah Roberts to explore music written by and for women in the 16th and 17th centuries. In 2000, musicologist Laurie St
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 0x51067b2bb1dae4307633410dd4945cbc8bb9a24ecf496fd0ae6795a497ca878d. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/49bac25b-3a10-42c9-8e7c-2b921c68ef31.json and https://artists.proofprofile.net/proofs/artist/49bac25b-3a10-42c9-8e7c-2b921c68ef31.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
A Golden Treasury of Renaissance Music on Original Instruments
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 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJX9706510 — a six-check JSON result.
A Golden Treasury of Ancient Instruments
Musica quinque vocum (Attrib. to Leonora d'Este): Tribulationes civitatum audivimus [from the Musica quinque vocum motteta materna lingua vocata] (attrib. to Leonora d'Este)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebb332f87f6bd77f5f36943f088f9c280a3d176ab657dc7ea9c0e7ce4cd0403. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBCJG1402200 — a six-check JSON result.
Musica quinque vocum (Attrib. to Leonora d'Este): Haec dies (from the Musica quinque vocum motteta materna lingua vocata) (attrib. to Leonora d'Este)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93c985d5d753819c1023047b41bfb1a783bf0db70247982c4dfd18f5a9609e3. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBCJG1402202 — a six-check JSON result.
Musica quinque vocum (Attrib. to Leonora d'Este): Felix namque es sacra (from the Musica quinque vocum motteta materna lingua vocata) (attrib. to Leonora d'Este)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14f8483fdcde7e980177d9d593fbb6179972a721be4843b294c4dff31a80a87. 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/GBCJG1402211 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba67c5943cce772a56a7a12bc4e02e98104be2527c8a0105317325712d9271a. 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/GBBDZ0925598 — a six-check JSON result.
Motets for 5-8 Voices, Book 3 for 5, 6 and 8 Voices: Surge illuminare Jerusalem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd581909ac7c7dddb1909de050dcdd0c6bbb91d64a28601de5cada9acb07e2f28. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBBDZ0925599 — a six-check JSON result.
Amo Christum, In Cuius Thalamum Introivi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd95f53031262d153dadcf16af8f2eb1e25ed6b790169d7dfb4efef2b810c31. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBDZ0925601 — a six-check JSON result.
Masses, Book 9, Missa Veni Sponsa Christi: Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeade8abca527b0a0eaf3cc70e3526b51ad0d92a815de1e8bfe89419e7024330e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBBDZ0925603 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a57c98c8d084fac8fad813ba3072de95983f2345a9c3b56662fb7bf8e79dda. 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/GBBDZ0925608 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaeddc7de7ec848c73ac60b1e032926b313751811533e70d78c05ebb2db5e201. 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/GBBDZ0925611 — a six-check JSON result.
Dangerous Graces: Music by Cipriano de Rore and his pupils
Barbara Strozzi: La Virtuosissima Cantatrice
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9c1336ec276dd1bf3123f450aab9ea5e80ffaa162fcce07bf81eb7d4a008bf. 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/GBAJX9406101 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a394f7aa1c0acfcf7f1c0d66180a47ef173fc7b87e45e72fbd9845d16b737e. 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/GBAJX9406105 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd9f56a8850a2b6c85bebc7ba9b9a5dc322be2ff9dfc4ade65215457ddc64ca. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJX9406110 — a six-check JSON result.