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 0x287d887aa3483c058865156733d4bf9065c35ae55e2ca03652ea3bf74cf1cab1. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce4b2970-9473-46ce-b942-cc238612a38b.json and https://artists.proofprofile.net/proofs/artist/ce4b2970-9473-46ce-b942-cc238612a38b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La Bohème / Act 2: "Aranci, ninnoli! Caldi i marroni e caramelle"
Coro Voci Bianche Del Teatro Alla E Del Conservatorio G. Verdi
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 0x8520952cc911bcb04f457265461777ec88071dc09a72a7f3f266311d7393e2f2. 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/GBF079841011.
La Bohème / Act 2: "Chi guardi?" - Extract
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec33aa1bd3f0b1071f3fd3d75d55a064a440f3f1166c6c8d703c6e8f10487cc7. 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/GBBBA9850210.
La Bohème / Act 2: "Chi l'ha richiesto?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3538466a10b6a392cb63ec09ad724d8f33ecc601d6a733a519058449f15d8a. 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/GBF079841016.
La Bohème / Act 4: "Vecchia zimarra, senti"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7268a54f14a80eeb2a95ec4b8f3e5bc01a15551acb3cd054f77a30cdba48a38b. 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/GBF079841029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d5cf3958f107176e227ae7c1cdf2409cc634ff4f748e0767636a421a59a791. 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/GBF079841031.
Il Turco in Italia / Act 1: "Ah! se di questi zingari l'arrivo"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b544e4d4bce31044ccd771b85b3f54e1a5a2d86d461c15fcb971d390e3d0a27. 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/GBF079740604.
Il Turco in Italia / Act 1: "Sono arrivato tardi"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811f4d399bbf96c9b94223bfc894f6fbe31ae411b208ec4ec0d2fbc7166b344a. 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/GBF079740620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea92217c06050f8f8ace508229c6bbadd03f4af4d22c61413939f4af1b1288c. 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/GBF079841015.
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
La Bohème / Act 4: "O Mimì, tu più non torni" - Extract
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3ebeebd3d54eea1545850636b1b1d419d67d1de7a24fb77fb8d828bf9d4c2c. 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/GBBBA9850200.
Il Turco in Italia / Act 2: Squallida veste...caro padre, madre amata
Cecilia Bartoli - The Art of Cecilia Bartoli
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c79f097daf97e075f8560d24e74d42207008d316f67cd919e5c9beef1fca9ac. 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/GBBBA9750040.
Il Turco in Italia / Act 1: "Ho da far un dramma buffo"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad700b692f3a9b147396fb02fb1d3b4c9db215ab62a77c1a0079c32d17f6532. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBF079740603.
Il Turco in Italia / Act 1: "Brava! Intesi ogni cosa"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9469e6ea80f33fa0b13907d5eae60ecf6b18f0dc8096a7821b0839fd800832b3. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/GBF079740608.
Il Turco in Italia / Act 1: "Della Zingara amante"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e391b4191f7e98d7d73d67a6143150f4ced151f247560c592f778f77f869626. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/GBF079740614.
Il Turco in Italia / Act 1: "Un marito scimunito!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e4f0cb94d2a6f4da57027540ff30c895f77b2fc7521f68117724bf98f17205. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079740615.
Il Turco in Italia / Act 1: "Ho quasi del mio dramma"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7166e06b8c5419f2d884f140e840b194460703c6c45c04331756083a733cfeb4. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBF079740623.
Il Turco in Italia / Act 1: "Per la fuga è tutto lesto"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f3dabb18dd8bd36c3c847305ab3d60e46566814b690646014508b0a5fb9fe1. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBF079740625.
Il Turco in Italia / Act 1: "Qui mia moglie ha da venire"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1340435aebc76e1deaa184dea9d812e7db78b3efa6227632091bfa7f237c143. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079740629.
Il Turco in Italia / Act 1: "Ah! che il cor non m'ingannava"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e198e60070b06da078dd9d8fe9e3fb660e1bafa6f6abba62627b591fd07ff7c. 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/GBF079740630.
Il Turco in Italia / Act 1: "Vada via: si guardi bene"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e67ad189ce5aed31a00b113e5fe6686fe2f7313bf16c76e408e8e362225a21. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/GBF079740631.
Il Turco in Italia / Act 1: "Quanto il vento"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6114ae365f7decdcf5a4c515386e0d4d6ba366b58e5603c9d51a746f10b7944e. 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/GBF079740632.