thumb|Francesco Feo. Francesco Feo (1691 – 28 January 1761) was an Italian composer, known chiefly for his operas. He was born and died in Naples, where most of his operas were premièred. Life Feo s
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 0x07b853516091e472a69177e84dff37930388daabd6f8d5d25eaed20fba045459. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d27b4f7e-ade0-4413-86e6-23c217db73ce.json and https://artists.proofprofile.net/proofs/artist/d27b4f7e-ade0-4413-86e6-23c217db73ce.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Fago: Il Faraone sommerso: "Alla gente a Dio diletta"
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 0x841492104fba9210370b21577f16532f375db433baa001ee4879ceb8f2a51fb7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1800975 — a six-check JSON result.
Fago: Confitebor tibi Domine: I. "Confitebor tibi Domine"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c74e81d134a481a64065dc7ff7d09a01bd29dec9e0005d98c34f8dcbcc6796. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1800976 — a six-check JSON result.
Fago: Confitebor tibi Domine: II. "Memoriam fecit - Escam dedit"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668371b3e566c0a73a6d58ada54bfe4fbdb238c2a880eee9b28d73471bc7162c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1800977 — a six-check JSON result.
Fago: Confitebor tibi Domine: III. "Fidelia omnia mandata ejus"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a796293e2cc2106bc6ff499fa57ec0977b6e19cef3a4315382331c807f37c0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1800978 — a six-check JSON result.
Fago: Confitebor tibi Domine: IV. "Sanctum et terribile"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53add1a882f66a1379654f83a67a3b250d429dcd949f23236de7d55ab1297a8a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1800979 — a six-check JSON result.
Fago: Confitebor tibi Domine: V. "Initium sapentiae timor Domini"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca9856528d317529c5a634d0784064ebc8d36a3ca2f4add29af3c30aed76dd1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1800980 — a six-check JSON result.
Fago: Confitebor tibi Domine: VI. "Intellectus bonus omnibus - Gloria"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1842dbc3c6a71687b1fc19e363f875181350345eabb5148ae6dac3edbe8f2d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1800981 — a six-check JSON result.
Fago: Confitebor tibi Domine: VII. "Sicut erat in principio - Amen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf446d19f4c35b38d1f6f846633d55e2ad05e33eba5ebc120755eea5d56e0cdd2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1800982 — a six-check JSON result.
Heinichen: Alma Redemptoris Mater, S. 22: I. "Alma Redemptoris Mater"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa61bd0fd969b835e2b6d980c67154ace24d3ca7a5cf9088c3a0b61b979512d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1800983 — a six-check JSON result.
Heinichen: Alma Redemptoris Mater, S. 22: II. "Tu quae genuisti"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4cad9d5e342eecb59983f7c2aa7c63145e50f757654dbbf1e0a01cc92e88d4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1800984 — a six-check JSON result.
Heinichen: Alma Redemptoris Mater, S. 22: III. "Gabrielis ab ore"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe404db0762de5119e0978bf02088e98993a155fc60d10e861f38188a73a81f19. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1800985 — a six-check JSON result.
Terradellas: Dixit Dominus: "Donec ponam"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a09b46004a26f7b64e02b42bb69026ac247ed935fc5f302718063f280f63c94. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1800986 — a six-check JSON result.
Fago: Tam non splendet sol creatus: I. "Tam non splendet sol creatus"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65981b3eaf88883d2c058a834e6d46d12a2dd1e03d955beca33c625b0ee0518c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1800987 — a six-check JSON result.
Fago: Tam non splendet sol creatus: II. "O nox clara?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66a725d0df499c55ba6854cb748d269efc271ff694f96d766d25a28168b0ff3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1800988 — a six-check JSON result.
Fago: Tam non splendet sol creatus: III. "Dum infans iam dormit"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e4dd0816880f438204d42a58fa6c825e306ca0d095e1af83de4ba61488655e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1800989 — a six-check JSON result.
Fago: Tam non splendet sol creatus: IV. "Alleluia"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434ee77fd0abd6c5ff1167044b05e150bf1999041cfb4473e0537e9a2ae70837. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1800990 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26c55c6cd4cfc437bfd82738823b4d967df94acdfcd028faededf59f7401b1b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1800991 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3555c4c60dbae67d5e2c9d0405fb201ed0dd1ff8ee9e7825c1ef978fad0de52. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1800992 — a six-check JSON result.
Zelenka: Gesù al Calvario, ZWV 62: "Smanie di dolci affetti ... "
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ecac5c3445a0b2cf0260bb1cbf8dabf3bc102ddbb1bd546568c67fa81bc2e0. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1800993 — a six-check JSON result.
Zelenka: Gesù al Calvario, ZWV 62: "S'una sol lagrima"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4aec7794fee65d19bf38686c380944c033c84a9f8026652c5bd8664596165c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1800994 — a six-check JSON result.
Hasse: Sanctus Petrus et Sancta Maria Magdalena: "Mea tormenta, properate!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb963d469808e02e8e8fabed8b127f1078b931c616d15d63485dad0b4f7698ce5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1800995 — a six-check JSON result.
Schiassi: Maria Vergine al Calvario: "L'agnelletta timidetta"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c7a63179be3a8df74ccca4c5ad2b0c8bc2a441c6c974683b49988d293e2e49. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1800996 — a six-check JSON result.
Durante: Messa a 5 voci: "Domine Fili unigenite"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c60385f8415315c88b5f5ed7df4fc8d4859da492f75582149c098c4a554f0d6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1800997 — a six-check JSON result.
Francesco Feo: Cantatas Vol. 1 - Il peccato, La morte, La morte del giusto e del peccatore, Il giudizio (World Premiere Recordings)
Feo & Manna: Lux in tenebris (Liturgy and Devotion in 18th Century Naples)
Arias for Domenico Annibali: The Dresden Star Castrato
Francesco Feo: Cantatas Vol. 2 - Il giudizio universale, L'Inferno, L'eternità, Il fine dell'uomo (World premiere recordings)