thumb|300px|right|Vicente Martín y Soler Anastasio Martín Ignacio Vicente Tadeo Francisco Pellegrin Martín y Soler (2 May 175430 January or 10 February 1806) was a Spanish composer of opera and ballet
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 0xd54618ee4c38b59ce3727c2861839bc875a43b4fc12bdd25d2db90a6bbb5ad93. Chain 2 (Bitcoin): anchored in block 953911 (2026-06-16T08:03:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/18101730-1e9f-4e55-9051-62535eb00108.json and https://artists.proofprofile.net/proofs/artist/18101730-1e9f-4e55-9051-62535eb00108.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Arias for Benucci: Music Written for Francesco Benucci, Mozart's First Figaro
Una cosa rara: Aria. In quegli anni (Tita)
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 0x8b7077c8a3d4f38b238515e934e504cd0f73eb19282615869b2c1e1e4201acb3. 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/GBAJY1507806.
Vicente Martín y Soler: Il burbero di buon cuore
Der Schauspieldirektor, K. 486: Ouverture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ec38c3f2314b4efa79558ab9f49ffb9475ba4e54a70423b286680949841753. 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/FR7JM1853010.
La scuola de' gelosi, Act I, Finale 1: Son le donne sopraffine (I tre pazzi, Le tre pazze)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d055c16e5cc79612152297963374e746233fece93be89c6a34d18d4420ad61. 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/FR7JM1853060.
Nascoso è il mio sol, K. 557 (Donna Elvira, Donna Anna, Don Ottavio, Masetto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89dfc3814515359f6e3efe8f8195ac14f092e5e27a9d1f8e7c1c313d57659df. 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/FR7JM1852140.
No, che non sei capace, K. 419 (Clorinda)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42c3ad6352e4a8bed41df8be8164ebf2d89bb041098d5f8197b3a9835afafb7. 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/FR7JM1852170.
Thamos, König in Ägypten, K. 345: Ne pulvis et cinis, K. Anh 122
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e7e94d0f15d12ea1f40b7c170600bb354bdeff28b2c8a5df54d6cab145d66d. 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/FR7JM1852190.
Una cosa rara, o sia Bellezza ed onestà, Act I, scene 18: O quanto un sì bel giubilo! (La regina, Lilla, Ghita, Tito, Lubino)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9122f9edceaa8a2b450e2d095ab3ab3e90c1674810902131c3e5adb79bcc06. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM1852120.
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
Boccherini, Soler, Nebra & Hita: Arias de zarzuela barroca
Festival de Música Antigua de Úbeda y Baeza: Selección de Grabaciones en Vivo (2000-2020)
Recopilador: Cantiga Tanto Quér Santa María
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6158d2b98b5a19957a3c62838ae9e3148ebf34ab83fba0ceb3c9e646b787466. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5682100684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4381d1e1379430abd83cea84c001d7d93892556434710dc07e84ff5b14b8d1. 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/ES7891902001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92d3f569756566f9414e51b6f42e379959971d4eb4c5e8c63ba7bdf887e93d0. 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/ES7899800101.
Una cosa rara, Atto I: No. 10 O quanto un sì bel giubilo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6691fbeb512d2728ffb33569e61fe828d7370b1e94be16d121904e9982970349. 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/FRZ140803050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7107c248bc4b3ab31bfd2a5c98014ebf61cc32c69983964b749ba388730b6c9. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ140803010.
La Preghiera, Vicente Martín y Soler (Live Recording)
The Musical Manuscripts of Monte Cassino Abbey (I Manoscritti Musicali Dell'Abbazia di Montecassino)
Tirsi non giova il pianto, Archivio di Montecassino, Fondo musicale, 2a - 3/1: I. andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a562e2c88f53a0d7e220467cc7e14567e32532db525925fea2045f27812ffe0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITDF61806005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe584a8485ee8f124b6cdccd6975291c93f533fabc978d902259161d7cfed22. 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/DEE861806651.
Sor: 12 Seguidillas; Andantino / Soler: 7 Canzonette; 2 Arias from Una cosa rara
Leçon, Op. 31: Study No. 23 in E Major "Mouvement de prière religieuse"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d1f8403c62d419b0a1b8871ac4b88fcc9a74a247423dd7aa768d233d0ff7c5. 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/ES7899500113.
Divas Of Mozart's Day: Arias Written for Catarina Cavalieri, Nancy Storace & Others
Mozart & Contemporaries: Music for Basset Horn Trio