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 0xa3bf3b930a6ba058dbb0f331ca5df312d08db758354bb67e93dc2ca58d63faf6. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0694e84-675c-47f7-904a-cc2485348e79.json and https://artists.proofprofile.net/proofs/artist/c0694e84-675c-47f7-904a-cc2485348e79.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cambini: Concerti per pianoforte e orchestra & Sinfonia concertante per flauto, due violini e orchestra
Cambini: Wind Quintets, Op. 4 and Trios for Flute, Oboe & Bassoon, Op. 45
Cambini: Quatuors pour Monsieur Lacépède, Vol. 2
Cambini: Quartets for Monsieur Lacépède, Vol. 1
Cambini: Sei Trii concertanti - Opera 26
Cambini: Sei quintetti per flauto, oboe, violino, viola e violoncello
Cambini: 3 Quintetti concertanti, Op. 4 - Briccialdi: Pot-pourri fantastico sul Barbiere di Siviglia
Cambini: Opere da camera (Chamber Works)
Cambini: 6 Trii Concertanti Op. 45 per flauto, oboe e fagotto
Cambini: Quatuors Concertants op. 21, Boccherini Sonata a Viola e Violoncello - Tuscania
Giuseppe Maria Cambini: 3 Quintetti concertanti (For Wind)
Colombes et Cocodriles (Beethoven and Cambini Duos)
Giuseppe Maria Cambini: Six Duo Op. 4 per flauto e viola obbligata (Paris 1778)
La Carmagnole (5 Variations for Solo Clarinet)
Cambini: Trio No. 2 for Flute, Oboe and Bassoon, Op. 45