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 0xf7e80b094acd2037af94e34614e3beb36325ad164c1abae0bc102f88935fdfd4. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3ca2290-e28c-40fc-96c7-d9b45037655d.json and https://artists.proofprofile.net/proofs/artist/e3ca2290-e28c-40fc-96c7-d9b45037655d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Orchestra del Maggio Musicale Fiorentino
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 0xff57e5e5f59813925381d5790c738a0514233d8620a96e596cdc4029c2a6d8ad. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITZ041600016.
Aida / Act 1: "Sì: corre voce che l'Etiope ardisca"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0bc860b3f2e71a93fcdf62a932eee658bacb1b770b2bd208a047f4731aa691. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITZ041600017.
Aida / Act 1: "Se quel guerrier io fossi!..Celeste Aida"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed16a377f532d972456bf9d6a5214ed72801f1cae9f74d187966a4959840160. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITZ041600018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf390ff8459a29b27e639465293835cf0b3a36d9842302809a0cf3379541b148a. 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/ITZ041600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82579e0b2ac34d19943754a2a3e68c10da790d46d72ba3840268a17819690ef4. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITZ041600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5303727c94c97e00a1d4a3df8f016db0b896451c529995c1cba7afb591166e7d. 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/ITZ041600021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d73fe626f65b49368bb6afe4fcdae65dce1eb3094c2a2dad37b2a64a45f402. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITZ041600022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd5cbd350bd8f8efef7a09bce73856d5d0bf1a3b46e62ee89aaaf21deafb503. 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/ITZ041600023.
Aida / Act 2: "Chi mai fra gl'inni e i plausi"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d94677c4e4b5bb9c0db826226b039e8249f70e38bf2985253ff9488e71b8104. 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/ITZ041600024.
Aida / Act 2: "Fu la sorte dell'armi a'tuoi funesta"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a6de01b214a676e848f72323240715909fe5c3faa4c21bc4f47d9745b2d2ba. 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/ITZ041600025.
Aida / Act 2: "Su! del Nilo al sacro lido"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993171d030625b15e2f674fb57056e7e57412636673cebb6913bdfcf4d1283d9. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/ITZ041600026.
Aida / Act 2: "Gloria all'Egitto, ad Iside"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121083a07abe7df636be38b80c787acab9b61ba7ad4a1dd81c4ede6bd3690624. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITZ041600027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85a1a4d1760493fb83796f02a6692944548c162cf79e0450bef8f3458b65e94. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITZ041600028.
Aida / Act 2: "Vieni, o guerriero vindice"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5456add283dc3547dfb3f661bd493b2a8232f922fc82e5adbfbea6b3c9bc111. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITZ041600029.
Aida / Act 2: "Salvator della patria, io ti saluto"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027286c74de99d92f1b2e1572c9f6dbc2e0127419bbea4a52ca952ce132554d1. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITZ041600030.
Aida / Act 2: "Che veggo!...Egli?...Mio padre!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccba609c3cf2fc90f4021547f579c528138369788d231dd8c7a1112899ddcdd. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/ITZ041600031.
Aida / Act 2: "Quest'assisa ch'io vesto vi dica"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac86a95beae77b020cb534875eeefcc29462e4f22911abb076d79b3009ada2f2. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ITZ041600032.
Aida / Act 2: "Ma tu, Re, tu signore possente"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e63e4d3d4448a18e12e33f23e7e1c8062739b7832230da215a6b38b504c448. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ITZ041600033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbe291e08f4b4ae4684b9861bf0147ee8e1bb5a0f55a7f14960f10685e02abf. 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/ITZ041600034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cf717564a7c2c7f45a1a72d290cddb2c8d8fa7d0428474f61489dc6147e360. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITZ041600035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6147b263db06b66789f5eb67fe1d24e7c55cad20f402704e991a9462d08757c. 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/ITZ041600036.
Aida / Act 3: "Qui Radames verrà!...O Patria mia"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ebb136eb5ca1190f4e832bfaf5900011ad368464b3589fa455fd7d525edcc0. 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/ITZ041600037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6389473bcf96df0754824a14b42baa00230b31467352aeefe49d3cef5b92bd8a. 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/ITZ041600038.
Aida / Act 3: "Pur ti riveggo, mia dolce Aida"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f4bfdd0d21c1ebb123011fe98bba4aed1697f2c1694feb1744d2b1af885c77. 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/ITZ041600039.
Aida / Act 3: "Fuggiam gli ardori inospiti"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3d106502077601f9471a786c6f6ac63e3febab40fadf4bd7a5ffc6c94c3527. 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/ITZ041600040.
Aida / Act 3: "Tu...Amonasro!...tu!...il Re?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7d0e9fa5a443e6df0cf56d9b39ec61594934b2514516fa5a0bf643c165752e. 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/ITZ041600041.
Aida / Act 4: "L'aborrita rivale a me sfuggia"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0372c7beba07abedac9d40b5fee9c48bcd66481c9d0f7fe75516a364cef84eb7. 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/ITZ041600042.
Aida / Act 4: "Già i Sacerdoti adunansi"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d84980fdc2e9ea9a5837776d46efbcf15f0cdd8434fc2c93e6b0fb13928e032. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITZ041600043.
Aida / Act 4: "Ohimè!...morir mi sento! Oh! chi lo salva?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29993032b9d0b2fa649460932f57922f178ca86c346b3b42c15e00728700ff05. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/ITZ041600044.
Aida / Act 4: "Radamès! Radamès! Radamès!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70baf4a30b05ef609e688c0c90d5a14151f7d30310b49ab4e409a8a53213c67e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITZ041600045.
Aida / Act 4: "La fatal pietra sovra me si chiuse"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d098516764a47b7ee259bfe547f213fa175a8af369e419bb001f12f9260ebc. 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/ITZ041600046.
Aida / Act 4: "Presago il core della tua condonna"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8072710cef3e2c14036b038715ef34390abcf999bb1fc9d9a44e06c46bb62804. 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/ITZ041600047.
Aida / Act 4: "O terra, addio; addio valle di pianti"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded555e79dc4ea8281ce63d12d249dae257ff5138c6ff2fbaa04a332a2ddfb19. 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/ITZ041600048.