Lodovico Grossi da Viadana (usually Lodovico Viadana, though his family name was Grossi; c. 1560 – 2 May 1627) was an Italian composer, teacher, and Franciscan friar of the Order of Friars Minor Obser
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 0x4c49b1dcc30d0b742a9d6a4161993eefcfa9f68461771d4d4fd6e63d939a19b7. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2971932-7947-42b2-b536-332a470b362b.json and https://artists.proofprofile.net/proofs/artist/e2971932-7947-42b2-b536-332a470b362b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Viadana: Vespri per l'Assunzione della Beata Vergine (Concerto In Onore Di San Marco, 1992)
Lodovico Grossi da Viadana: Sinfonie Musicali Op. 18
Viadana: Vespri di San Luca, Op. 27 (Dai Salmi A Quattro Chori, Op.xxvii, Venezia 1612)
Viadana: Officium defunctorum - Missa pro defunctis
Cento Concerti Ecclesiastici: Laudate Dominum à 2 Soprani, Basso e Continuo
Exultate Justi (feat. Ludovico da Viadana)
The Schola Cantorum of St. John XXIII Parish
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 0xc01a8a1abae1d37d805984df4e40242d2693adf5447f5e7411e66418fc620c22. 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/TCACT1694188.