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 0xae8158ed9c54e0372c19df37cfbdc17e67a2048a112697dd6b7435802c463adb. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4cba441f-3d3d-413a-81c7-24d937009247.json and https://artists.proofprofile.net/proofs/artist/4cba441f-3d3d-413a-81c7-24d937009247.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
El Barbero De Sevilla: "Acto I: Una Voce Poco Fa" - 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f821156eea21a21ea53cc948f099c96c0c678427717c7ecbf9d069b66d11397. 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/ES5271000301.
La Italiana En Argelia: "Acto I: Cruda Sorte! Amor" - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e216b1c408bc87f9e4685d2a1fd733cd649e41905feeffbb49fe2036d415f7. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ES5271000302.
La Italiana En Argelia: "Acto II: Per Lui Che Adoro" - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ee298ea22fd7fa17f46e0f9f114a424c6cb8e5e494c6dabf701670d97bcdc6. 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/ES5271000303.
La Italiana En Argelia: "Acto II: Amici in Ogni Evento... Pensa Alla Patria" - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac631fdfbae823447a90850f962130f471b7858ac5dad84ca1cc678f5ff5733c. 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/ES5271000304.
Stabat Mater: "Fac Ut Portem" - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02682431d93769c8cbdb4a00fcf96e051abbb9180c8a48fc5c37e0acc961217. 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/ES5271000305.
Semiramis: "Acto I: Bel Raggio Lusinghier" - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16a5c5cf6eaec17f000b2af7f1633d8f25b45a0358c97a8b5d3e684f0c12316. 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/ES5271000306.
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
El Barbero De Sevilla: "Acto II: Contro Un Cor" - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8f9a20d0f0c6fd1a93f8360e249b9af317c3aa19dc81c6f82012090b3f7082. 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/ES5271000307.
La Cenicienta: "Acto II: Nacqui All' Affanno... Non Più Mesta" - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3097bd5643b692edf7da52423226c67b8da57e01cdebb3b18a1ff91516c91b. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/ES5271000308.