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 0xd61c9f905b9a5d070135e8a314c2f60bb134319e6a2473bf2812fcf01c685c3f. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c94c36d4-6f5b-472b-bb95-ef1320dcbb08.json and https://artists.proofprofile.net/proofs/artist/c94c36d4-6f5b-472b-bb95-ef1320dcbb08.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Donizetti: L'elisir d'amore, Act 1: "Udite, udite, o rustici" (Dulcamara, Coro)
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 0x979f9b7d11e70115f78f7fec020945dfd4d6d3ff2129fe78ad74d7ae70dd5f22. 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/FRZ209201005.
Donizetti: L'elisir d'amore, Act 1: "Ardir! Ha forse il cielo mandato" (Nemorino, Dulcamara)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a8c7f2d7177da54135c1e1a79a0380829d8e0851acc7a0ff20c8a48ada315f. 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/FRZ209201023.
Donizetti: L'elisir d'amore, Act 1: "Voglio dire, lo stupendo elisir" (Nemorino, Dulcamara)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993e191095ab28dfae6cf2d8d11f31aec840c1cceec2f618c2af43aedbff56ef. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FRZ209201024.
Donizetti: L'elisir d'amore, Act 2: "Cantiamo, facciam brindisi" (Belcore, Dulcamara, Giannetta, Adina, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c78cfc2c3a3ee926c973bc7819f5440d8feb15043ffb939c74e4e2cc92c3a5f. 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/FRZ209201027.
Donizetti: L'elisir d'amore, Act 2: "Quando amore! Ed io, spietata!" (Adina, Dulcamara)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c23adc4a303e87ed21450a010882aaeb30b5c18d3b9f7f7d8741fe32877126. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/FRZ209201032.
Donizetti: L'elisir d'amore, Act 2: "Una tenera occhiatina" (Adina, Dulcamara)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3790455334689cdad1bb2315a29c35824c1260258176ddfdc903cec77fb5b2. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ209201033.