thumb|upright | Portrait of Joseph Rescigno Joseph Rescigno (born October 8, 1945) is an American conductor best known for his work in opera in North America and Europe. He served as Artistic Advisor
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 0x9cd09fa44ae38ed078f808154df4419a3dc79ff892b596610cea5ae67154c8c3. 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/47b9747d-f481-420c-96cb-e2da4bd1ec2c.json and https://artists.proofprofile.net/proofs/artist/47b9747d-f481-420c-96cb-e2da4bd1ec2c.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0x7f55d66ff5145afa902ecd5fed0a019516a926b9c0140c91f361d5acd8ced506. 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/USA370578442 — a six-check JSON result.
Soprano Arias: The Definitive Collection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1bca06d0c32949af386f85b212729be45cacb84f752c9a5269e318f72ebdfa. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USSM18100535 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1c84a7c163d37999effa3ba34500f6324dd6e10943bccabefaa5aa78c3fb7d. 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/USBC16600180 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba783c23f4659b09171492e28df1d1e065469e5a476f6f5acddf3cc296dcadc3. 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/USSM18100809 — a six-check JSON result.
Les contes d'Hoffmann: Les oiseaux dans la charmille
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a7506b90575e5c548c5ab24e9ee9f0f968380011fcaa77fdc5595acca38490. 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/USSM14700080 — a six-check JSON result.
Don Giovanni, K. 527: Crudele?... Non mi dir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4bc6e77d225605ab22a7484b9a9a65002592d421396831ee17d25f168c08154. 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/USBC19001189 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9a80c1806bef3f445fb736551dcdd5e6600847f2fea897c15b6562a6688029. 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/USBC19704041 — a six-check JSON result.
Le Nozze di Figaro, K. 492: Dove sono i bei momenti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7779f36bf4eeb34c85405196424875a87c7f6230e13dbe4e8c593e1ee7ffbe. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USBC19000246 — a six-check JSON result.
Linda di Chamounix: O luce di quest'anima
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff46fc159f2850874adb045bc1e0a30269d89c23397bed1538060fcc0f02a1d9. 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/USSM14900126 — a six-check JSON result.
Brahms: Piano Concerts and Piano Solo Works
Two Rhapsodies, Op. 79: Rapsody No. 2 In G Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d1d9df03662ef0eaa50fed40939102cc323b54ad3359f9055a8e33b49df1f6. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USA370523917 — a six-check JSON result.
Mozart: Soprano Arias from The Marriage of Figaro; Exsultate, jubilate
Exsultate, jubilate K.165: IV. Molto allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846ead7ac29cdbc9b4945d5343f8b1f3ea0654fe115c0012415a771263cd7325. 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/USA370670616 — a six-check JSON result.
Le nozze di Figaro K. 492: III. Voi che sapete (Cherubino)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c305811a08ca625ae8fbe5a0fd5fdaa313f2022e0953da6797fea4a6e745218. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USA370670619 — a six-check JSON result.
Le nozze di Figaro K .492: VI. Sull'aria (Duettino Contessa-Susanna)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b9af9d806fe25b2fca1eba0becd26575f1f703370b4f8d0fcd6674bb0afd8c. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/USA370670622 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56924b011fabda3b770e5afde400be70092983b7e034513d14ad900d251914f8. 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/CALC40600375 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4620460cb25de8dd2f2e362ed4a1e0f40a78dabab138b74d309b0d40eb136be2. 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/USA370520921 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc304fba58896c84d20080b9bd313f7e1844931b20d1bc6d896e0bef2486bbe46. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USA370577020 — a six-check JSON result.
Navarra, Op. 33, For Two Violins And Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574ad452626b5b5509296e8eda7cab5d9552778215032132f071b4e9bf39d977. 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/USA370522450 — a six-check JSON result.
Posthumous Nocturne in C-Sharp Minor No. 20 - Arr. for String Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27463b8efb1661085e8d8b5e338fd505087d3bbf7049e0f530548bb0c66a505. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/USA370522448 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4ae4db97428ac9eb2a50a8ddaeeb67f645b762fc96c842282752f213a0738c. 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/USA370563571 — a six-check JSON result.
Verismo: Opera Arias (Verismo: Airs D’Opéras)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4c1f3a19e1dbdae9a926f1858f1f74e508b3029ea430d8352f15f404cd6f5c. 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/USA370523030 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34dde52c977f5243243c369d07765d26f553fd4a22ba82f2641bc1495f3d588. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USA370523037 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b8f033ebcb25d9b1d847ec4296713f7072c9125f25491e4754221c77223e5e. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/USA370523835 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f8fee1d31675c2fe47a4e22975947f1eeb6f6685c63fbadc1ce7d3ba74317c. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CALC40900039 — a six-check JSON result.
Las Cuatro Estaciones Porteñas / Otoño Porteño
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9893fa9058583cf5fed60f27bbb76394c306167636ba8486ebddc3c174672fe. 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/CALC40800308 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372284e36a67834b5ebfcf055b4bc1b22d5c8d52e09d7f1e2a0e02e460d3fc97. 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/USA370577010 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda27a1513d0f51cd76a97968eeb3f4468a1eeed221285e42f5f415151516dddf. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CALC40901156 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b47494c90e82f5c1806995e67cf47c9b87b8264a5868a5d3e184a8dfd02b9f. 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/USA370531163 — a six-check JSON result.
Dido and Aeneas / When I Am Laid In Earth
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c78d17b0430a71a150286f21a63d10b1ff59e793df310dbc3d17479392277c. 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/USA370522477 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc9c827869e1ac7a1bd78a940a50bbb3f02c28801c17158d5881ca06d34b597. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USA370557842 — a six-check JSON result.
Piano Trio in E-flat major, Op. 70, No. 2 / III. Allegretto ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9228df596e808d04ccbf4d79163cd60983c728f5c523eb17ca44f7c11550ca90. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/CALC41001356 — a six-check JSON result.