Francesco Demuro (born 6 January 1978), is an Italian operatic tenor who made an international career. Life and career Demuro was born in Porto Torres, Sardinia. By the age of ten, Demuro made his
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 0x8c92835876c21067c074c74cbaf403897db97a16391c318e0204451ef02408bc. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba3a608b-0098-4d91-ac10-c1138a5c4ff4.json and https://artists.proofprofile.net/proofs/artist/ba3a608b-0098-4d91-ac10-c1138a5c4ff4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Orchestra del Maggio Musicale Fiorentino
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54a086a5b9f366686495d22af45949e03b8492f73e84b80584e7329754bb10d. 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/ITN322119889.
Linda di Chamounix, A. 62, Act I Scene 3: Ah! Tardai troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79781b74b6de3133e73aa38cb9c1d0d285b8e5a11531007f95edba8a700c2a49. 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/ITN322119895.
Linda di Chamounix, A. 62, Act I Scene 3: Qui sì, pria della partenza
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b93053356da076a95439dceadc63a374f83782c06667e230d494875ad7a03e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ITN322119897.
Linda di Chamounix, A. 62, Act I Scene 3: Cari luoghi ov'io passai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9ab5f9f3e1427890514027901bbf305fa4d4509dce6379934bd35fe7cbc1a5. 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/ITN322119898.
Linda di Chamounix, A. 62, Act I Scene 3: Per sua madre andò una figlia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356fa2dd73c37c17f4df7f7b3f504c9e28de447d2d9366f067d622465f6c5ae4. 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/ITN322119899.