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
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, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
I Lombardi - Act 3: Processione: "Gerusalem"
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 0xb68509d0d6971c6a6e47b74008cd76adcba12fc8243a75092218b8a5fa217baf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBF079643321.
I Lombardi - Act 3: "Dove sola m'inoltro?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845b5924ca8d6e381a0bf4e2fcfc4b7b05f00d6409e1905e4e7ae3621a4c088d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBF079643322.
I Lombardi - Act 3: "Oh belle, a questa misera"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1289c4b59b9a39877f44e815a278a1798311871ddaec7cf88c3e7d76faa8ca. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079643323.
I Lombardi - Act 1: Scena: "Or s'ascolti"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf52c11157874e518e701b07b067bc18bd2aa449b18bcd51178d10caf8286f04. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBF079643304.
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 957124 (2026-07-08T03:53:27Z), 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/GBF079643324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c5aba1b1f228211d56bca21ae86c8c90598d5091d7acd946db7019a7bd32a0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBF079643325.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079643327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ece936080157209b69884cd20bca49caec4b75ef24a8fcec8985eca276ef38. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBF079643330.
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 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079643318.
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 957122 (2026-07-08T03:39:04Z), 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/GBF079643319.
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 957145 (2026-07-08T08:56:20Z), 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/GBF079643320.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079643303.
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
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079643307.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079643309.
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 957124 (2026-07-08T03:53:27Z), 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/NLE421406023.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE421406003.