Francesco Barsanti (1690–1775) was an Italian flautist, oboist and composer. He was born in 1690 in the Tuscan city of Lucca, but spent most of his life in London and Edinburgh. Biography Very little
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 0x783346ea034c84a78a8bdb8f6cf39999d08e9a221d82f853169a89d5d95b494d. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a3b8afa-139b-47bd-a8d4-c1f2b1528696.json and https://artists.proofprofile.net/proofs/artist/5a3b8afa-139b-47bd-a8d4-c1f2b1528696.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Fairest Isle: A New National Songbook (English Orpheus 47)
A Collection of Old Scots Tunes: Lochaber
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 0x052b9f10aa238ee1afc148ceefaff4a8b184e5a34b7cd20276ef5fb6308f1503. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA460915443.
Barsanti: Concerto grosso in D Major, Op. 3 No. 10: I. Adagio - Allegro
Württembergisches Kammerorchester Heilbronn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fce2e08bca996ecd84a756024c40b1c28319b649bf87bdf4fbbed44d8e92555. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/GBAYC8000554.
Barsanti: Concerto grosso in D Major, Op. 3 No. 10: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2aeb8edb7da6b2a121b614714fbb03c90ee62c02c7c48b36076dc94be3f159b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8000555.
Barsanti: Concerto grosso in D Major, Op. 3 No. 10: III. Allegro - Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12f677203428aa3dfd55e51b3aaa4db56d0aabfef665e6ad904f4f68f232a5c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8000556.
Concerto Grosso in C Major, Op. 3 No. 7: I. Sostenuto
Barsanti & Handel: Edinburgh 1742 (Parte seconda)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29eb0b80c79489f54947a4107ba83bd5f4c86c3face40126a9201172ca0a651c. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBASH2062605.