thumb|upright|Patricia Racette, 2012 Patricia Lynn Racette (born in 1965) is an American operatic soprano. A winner of the Richard Tucker Award in 1998, she has been a regular presence at major opera
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 0x8d080e5da119cdbac4027e0100c9a77734958948c7dea388ac7fb88a06b6e0a6. 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/4ac8174e-cab4-4fee-918b-97bd112cafec.json and https://artists.proofprofile.net/proofs/artist/4ac8174e-cab4-4fee-918b-97bd112cafec.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
I Lombardi - Act 1: Preludio e Introduzione: "Oh nobile esempio"
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 0x2962162cd3ea8692040d05e7509f9ad11cdb188949324c1cc1dcaee1cd9e892d. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBF079643301 — a six-check JSON result.
I Lombardi - Act 3: Processione: "Gerusalem"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68509d0d6971c6a6e47b74008cd76adcba12fc8243a75092218b8a5fa217baf. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079643321 — a six-check JSON result.
I Lombardi - Act 3: "Dove sola m'inoltro?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845b5924ca8d6e381a0bf4e2fcfc4b7b05f00d6409e1905e4e7ae3621a4c088d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079643322 — a six-check JSON result.
I Lombardi - Act 1: Quintetto: "T'assale un tremito!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74336393049e752aeb9f2e519be9e4df9627934cda17f0aea6134dd81ba1aa1. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/GBF079643303 — a six-check JSON result.
I Lombardi - Act 3: "Oh belle, a questa misera"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1289c4b59b9a39877f44e815a278a1798311871ddaec7cf88c3e7d76faa8ca. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079643323 — a six-check JSON result.
I Lombardi - Act 1: Scena: "Or s'ascolti"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf52c11157874e518e701b07b067bc18bd2aa449b18bcd51178d10caf8286f04. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079643304 — a six-check JSON result.
I Lombardi - Act 3: Scena ed Aria: "Che vid'io mai?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940f550036313d5b6c0b14be84a6a3e6a8119afb94504a062d74aa74046d5588. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079643324 — a six-check JSON result.
I Lombardi - Act 1: "A te nell'ora infausta...Vergin!..il ciel per ora"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5315bde046434562b3c4745ec1fe307f9887700b023de00528e8cd550830b20. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBF079643305 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c5aba1b1f228211d56bca21ae86c8c90598d5091d7acd946db7019a7bd32a0. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079643325 — a six-check JSON result.
I Lombardi - Act 1: Aria: "Sciagurata! hai tu creduto"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821e8cd60a12f4c8a6bec4d2f49d847d0ab5368394f3928f0a2dbc47cd225e72. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079643306 — a six-check JSON result.
I Lombardi - Act 3: Scena: "Qui posa il fianco"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54c670048f38959e0268ab9a0f746cfed5f78046c7eef765f2f8dedac4c7c3f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079643326 — a six-check JSON result.
I Lombardi - Act 1: Scena: "Tutta tremante ancor"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a257fff9c11c30adf377e9833d76f7bf9d6f2074d033fca0d1649990f1836b. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBF079643307 — a six-check JSON result.
I Lombardi - Act 3: Finale. Terzetto: "Qual voluttà"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34dc723d5181d108ce90ce6a23b93e75d03aee774e576742b2badf390844c0b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079643327 — a six-check JSON result.
I Lombardi - Act 1: Preghiera: "Salve Maria"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5377ce245d36aa76942af495a4841dcb1f7761f2855a723adf38c28b5d39309. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/GBF079643308 — a six-check JSON result.
I Lombardi - Act 4: "Componi, o cara vergine"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0af3ffc775b3cd5c4202c91013fd3a9b69ace5fc2ab3f62202b490ca798015. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079643328 — a six-check JSON result.
I Lombardi - Act 1: Scena e Finale: "Vieni! Già pose Arvino"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb1cdad99e0166a6374c566f39705636bd38a707d32e13a6d7bce3fdbe7aaaa. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079643309 — a six-check JSON result.
I Lombardi - Act 4: "In cielo benedetto"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5360edeff951371f58065a33d298e31e2b9ad231b3b3e738871965f1b61266. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079643329 — a six-check JSON result.
I Lombardi - Act 1: "Mostro d'averno orribile"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682a97c8f69564e6579bbaff1b9daed5f0346f6a181adca6709a8502fbabbfa0. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBF079643310 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ece936080157209b69884cd20bca49caec4b75ef24a8fcec8985eca276ef38. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079643330 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157f8380ebd00960e8230d98680c3012942b431ca88d096b974de11fc5fc5dc2. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBF079643311 — a six-check JSON result.
I Lombardi - Act 4: Coro: "O signore, dal tetto natio"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53871e8dfbc0d5ea2888317e62431c9b0cafd8f223f5e91ad2bd9077e3268e1. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/GBF079643331 — a six-check JSON result.
I Lombardi - Act 2: Coro: "E dunque vero"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921f18cbe7420402142199a4cafce05842eb1deec5874dd8e6339e07a6c04e86. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/GBF079643312 — a six-check JSON result.
I Lombardi - Act 4: Inno di guerra: "Al Siloe" - "Guerra! Guerra!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5630884f4bc156bc23b23b6cd1da8ce87817e4bfe62a2f0b073de1d65e14635. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBF079643332 — a six-check JSON result.
I Lombardi / Act 2: "O madre mia, che fa colei?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72a7fe3f4056ca7a014590bf4458ec49ea0ed2801c3ea8308333301d990bd17. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/GBF079643313 — a six-check JSON result.
I Lombardi / Act 2: "La mia letizia infondere"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4abef79c5fa1563d488ab361485630896b1c38e7bb5cc3bc64941403511edc. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBF079643314 — a six-check JSON result.
I Lombardi / Act 2: "Come poteva un angelo"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72630656b0038ea9511243c4f830f78dd425d4972778216566d4bc3a5c570a4e. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBF079643315 — a six-check JSON result.
I Lombardi - Act 4: "Te lodiamo, gran Dio di vittoria"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b78d72ce8432015502f943af3b9f61b2f4d965967e7e8262adfa06d84b9249. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/GBF079643335 — a six-check JSON result.
I Lombardi - Act 2: Scena e Marcia:"E ancor silenzio"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7af532946dd96b49d89a83b36baac29cb33f2e75683fde7df2e0805d5b69e9. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBF079643316 — a six-check JSON result.
I Lombardi - Act 2: "Sei tu l'uom della caverna...Stolto Allhà"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c0c9edf663cc9dcf8f0656493410ccfccd7aa68d04c4b444bb73cba8f186f4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079643317 — a six-check JSON result.
I Lombardi - Act 2: Coro di Schiave: "La bella straniera"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b315c900e1d02c6e83d0b855f0457f7cebcf0736cbe6c6d702289fd3294eabd. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079643318 — a six-check JSON result.
I Lombardi - Act 2: "Oh madre, dal cielo soccorri al mio pianto"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8dd72b3333700b744c219cdf0187d6866b36d5d9f9480343c7f18d1d4dc4b28. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079643319 — a six-check JSON result.
I Lombardi - Act 2: Cabaletta: "No! No! giusta causa non è"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d227b2c55a4fa6315f30b7e167447e91016c6e7831625f8f1822aee87c0a104. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079643320 — a six-check JSON result.
The Ghosts of Versailles, Act I: They are always with me
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a06a1f61e90d653f29a9c579f7c1d3a722295da99dc398ebc8afbdebdf49052. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/NLE421406003 — a six-check JSON result.
The Ghosts of Versailles, Act I: Ya omri. Limatha hajartani?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16365858984bd67ab3ca5282a69bde6343187b670814ef0ffe614fb27e426036. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NLE421406022 — a six-check JSON result.
The Ghosts of Versailles, Act I: Tafaddaloo marhabun bikoom Shall we
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467b6f9d516ad05909398e0c0bf2397e922c467146d00fbcf9621acb19b12d4a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE421406023 — a six-check JSON result.