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 0x1280a21d49c5ace82aa95152b4c021cf047740fa549bad05aad5cd782ea43159. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4df75e2c-b9a9-4045-be21-9601f2294eb8.json and https://artists.proofprofile.net/proofs/artist/4df75e2c-b9a9-4045-be21-9601f2294eb8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Albino Varotti: Partite sopra un motivo musicale di Leonardo da Vinci (Non si volta Chi a stella è fiso)
Invenzioni a 2 voci, BWV 772: No. 1 in C Major (Per strumenti a corda pizzicata)
Duetto in E-Flat Major, BWV 802 (Per flauto e organo)
March in C Major, Z. 647 (For Whirly, Vintage Organ and Modern Electric Piano)
Adagio in G Minor "Adagio di Albinoni" (For Vintage Organ, Pipe Organ and Electronics)
Aria in G Major (Per clavinova e whirly)
Cumque Evigilasset (I 1000 anni dell'Abazia di San miniato al Monte di Firenze)
Cumque Evigilasset - I 1000 anni dell'Abbaxzia di San miniato al Monte di Firenze
Coro Gregoriano di San Giovanni Evangelista di Empoli
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 0xf2756647b656626430f06f6e1506c2b62c25aaaa29d0a343aada4e8d07aade90. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ITL661900136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b1757f6a7a2458ad112df987f0bf7fca5cfd4e1d4bea8f2923fc6b9c33b4fd. 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/ITL661800040.
Rintocco & Fu (20030727 Fortebelvedere Firenze)
emAni (Sonovasoro il corpo, oggi il fuoco)
ProtoseGuenza evoluta colui che sta (20040831-20140605) (San Francesco)
Siena itaDINeA (Santa Caterina da Siena)
201400518 ProtoseGuenza (20000114 ProtoseGuenza per sonovasoro Valencia)
Va (Voliera per Pratolino, dedicato ad Armano Scali)
Sentiero (Castello di Santa Maria Novella 1998)
Sulle rotte del sogno (Parole, musiche, storie)