Alessandro Rolla (; 23 April 175714 September 1841) was an Italian viola and violin virtuoso, composer, conductor and teacher. His son, Antonio Rolla, was also a violin virtuoso and composer. His fam
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 0x6b40d3f0ae1cf9e402989eb4dd19b6424897f19a383f1040ac26d504adcb2d4c. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/280bb207-74a7-453a-9af1-cadc786cae76.json and https://artists.proofprofile.net/proofs/artist/280bb207-74a7-453a-9af1-cadc786cae76.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Rolla: Viola Concertos/Concerto in E flat, Op. 3/Divertimento in F/
Duo for Violin & Cello in B-Flat Major, BI. 244: II. Andantino
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 0x333d5975e28aeb7f26face8752a9683d1344c2255d514e7a7836546d2be2e4eb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEB200196402.
Rolla, A.: Flute Quartets, Op. 2, Nos. 1 and 2 / Divertimento Ossia Sestetto, Bi 433 / Divertimento, Bi 427A
Viola Sonata No. 1 in E-Flat Major, Op. 3, BI 325: II. Lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d993acc5ac9a4f65ce2729e5e6596f57d37f287e78b5a5f208f462d775c91f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/HKI190940302.
Rolla: 3 duo concertanti per violino e viola
Rolla: Violin Concerto in C Major - Adagio per l'amico Cavinatti - Sinfonia in D Major
Rolla: 6 Trio Concertantes, Op. 1 (Complete)
Rolla: Music for Viola and Ensemble 2 Sinfonias
Rolla: Viola Concertos, Symphony in D, Tantum ergo
Divertimento per viola e quartetto d'archi
Alessandro Rolla: 3 Esercizi (Capricci) for Viola, BI 311, 313, 314
Alessandro Rolla: Complete Works for Solo Viola, BI. 310 -322