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 0xdbf5821c26e7702b8620d9c63a01eb513fc7f840e2e793a9af7d98e1421a4c27. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/05ae6370-1452-4078-a4e0-5721477947b2.json and https://artists.proofprofile.net/proofs/artist/05ae6370-1452-4078-a4e0-5721477947b2.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Verdi: La traviata (1953 - Santini) - Callas Remastered
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 0xc56ffdd54378b2196aeb665f6b38f70ce5f7cb106c46ce0bf9d60870939ac309. 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/GBAYC1450115 — a six-check JSON result.
Verdi: La traviata, Act 1: "Dell'invito trascorsa è già l'ora" (Coro, Violetta, Flora, Marchese, Gastone, Alfredo, Barone)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb169d2a3a487f3d068ccd747b3959efd2f712816ef064537ef1135d0fc9b34a9. 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/GBAYC1450116 — a six-check JSON result.
Verdi: La traviata, Act 1: Brindisi. "Libiamo ne'lieti calici" (Alfredo, Violetta, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b609f663407851f38971131156d50e94b96ac44f57da720baff5c7efd5d02b. 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/GBAYC1450117 — a six-check JSON result.
Verdi: La traviata, Act 1: "Che è ciò?" (Coro, Violetta, Flora, Marchese, Gastone, Alfredo, Barone)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995840983a4bca02d6fe487aa039dcda65338cb0ff858f5edde79b106a694821. 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/GBAYC1450118 — a six-check JSON result.
Verdi: La traviata, Act 1: "Un dì, felice, eterea" (Alfredo, Violetta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b06f144810d53d927ecd622ec32393d24471efb7d6dc903c83e7a0bd3873710. 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/GBAYC1450119 — a six-check JSON result.
Verdi: La traviata, Act 1: "Si ridesta in ciel l'aurora" (Flora, Gastone, Barone, Dottore, Marchese, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb202481932a1a06a9377b247f2158aed74f4077fc6bdeaedf6fd877e56eb798. 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/GBAYC1450121 — a six-check JSON result.
Verdi: La traviata, Act 1: "È strano! È strano!" (Violetta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5837a7f209163578f6b55a56bd9005242f1f5f36b4374dd2e8be7383873fb411. 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/GBAYC1450122 — a six-check JSON result.
Verdi: La traviata, Act 1: "Ah, fors’è lui che l’anima" (Violetta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ae3b114968295a58bb5df32885a8e17e574778c080378cdc0ed3bc47e8e1b6. 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/GBAYC1450123 — a six-check JSON result.
Verdi: La traviata, Act 1: "Follie! Follie! Delirio vano è questo!" (Violetta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662a8aab3bfc606fb719b4eedd9cde44771a85cfb93b0ca305f609f5f271c0a2. 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/GBAYC1450124 — a six-check JSON result.
Verdi: La traviata, Act 1: "Sempre libera" (Violetta, Alfredo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2bc6c7ace495b229c0a51ff355502ce77c3652a80c35e8ec6bd515d0d4a24da. 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/GBAYC1450125 — a six-check JSON result.
Verdi: La traviata, Act 2: "Lunge da lei" (Alfredo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c903db34e27ffe449859d6d07a44f61ba14ff05c2e8d6e19f81cb421b738947. 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/GBAYC1450126 — a six-check JSON result.
Verdi: La traviata, Act 2: "De'miei bollenti spiriti" (Alfredo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da30dbd4472bee1e101c01db7c90628fa565673b4006c331e3d82ae3a93f0f7. 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/GBAYC1450127 — a six-check JSON result.
Verdi: La traviata, Act 2: "Annina, donde vieni?" - "Alfredo?" - "Per Parigi or or partiva" (Alfredo, Annina, Violetta, Giuseppe, Germont)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca186a8e5f8f8f6ebe2f2ae857dca1bf5952e4cff7fc81b1647b01c1c40fac6c. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GBAYC1450128 — a six-check JSON result.
Verdi: La traviata, Act 2: "Pura siccome un angelo" (Violetta, Germont)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57df941441c4a47a9ec4b66a0909b488086770732ced3256a5a6e2dcdeeded36. 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/GBAYC1450129 — a six-check JSON result.
Verdi: La traviata, Act 2: "Non sapete quale affetto" (Violetta, Germont)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f5038460e24d8fe3ac6616e57fa9ec1c8266eddb5e0a8d674365736afb11e7. 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/GBAYC1450130 — a six-check JSON result.
Verdi: La traviata, Act 2: "Un dì, quando le veneri" (Violetta, Germont)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee19645c4997a922c90f0603a0337a90ad2e9b79dd934c7e91b838c886e62142. 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/GBAYC1450131 — a six-check JSON result.
Verdi: La traviata, Act 2: "Ah! dite alla giovine" (Violetta, Germont)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e160da72a56d63532f724c0c992b8d07500ae583224d1295c172a69f7bed0b0. 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/GBAYC1450132 — a six-check JSON result.
Verdi: La traviata, Act 2: "Morrò! La mia memoria non fia ch'ei maledica" (Germont, Violetta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218e76b97cbfd537b588124b2ab2aa9ff7027a513c8d3147639537925c5c050a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1450134 — a six-check JSON result.
Verdi: La traviata, Act 2: "Dammi tu forza, o cielo!" (Violetta, Annina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab2f09054bf74a557862f31f2bf69ab49e4be2f81acc3ac07bcc665ae846cb9. 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/GBAYC1450135 — a six-check JSON result.