Lorenzo Allegri (1567 – 1648) was an Italian composer, who worked at the Medici court, in Florence. He was mainly known as a lutenist, and for lute he wrote dances, sometimes with vocal parts. He was
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 0x6f32a0da16f9a688ca90d2a14ad10198945a94bd4f070ac4796da9c8ac644d78. 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/71cb7d92-c32e-4f13-b0a2-f5a3fca9e8e9.json and https://artists.proofprofile.net/proofs/artist/71cb7d92-c32e-4f13-b0a2-f5a3fca9e8e9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Allegri, L.: Suites Medicee (Les) - Il Primo Libro Delle Musiche (1618)
Le Lagrime d'Orfeo: 27. Sinfonia a 6. Spirto del Ciel "Primo ballo della Notte d’Amore"
Stravaganza d'Amore! The Birth of Opera at the Medici Court
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 0x29965e552f3d7006241e8620e7e7d509c822617706c94d1c9d92ee0f972d05df. 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/FR7JM1663270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3afabc498e52c621bf6a7093e11b715a980e88720ac0df77702461e8e69f7a. 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/GBPFW0900274.