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 0x6a3dde2ea321111e24409d95974a7a0394394f07a732049ac31b0366d9ac21b9. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/138e7c85-1157-4bc7-938c-3b4738dc9157.json and https://artists.proofprofile.net/proofs/artist/138e7c85-1157-4bc7-938c-3b4738dc9157.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mozart: Mitridate, rè di Ponto, K. 87, Act 1: "Vieni, signor” (Arbate, Sifare)
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 0x01399ff254e35a34597e9c899cc6b37ebc8537f8f5c73652870ff7799bc7e219. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBPFW2100072.
Mozart: Mitridate, rè di Ponto, K. 87, Act 1: "Sin a quando, o regina" (Sifare, Farnace, Aspasia, Arbate)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a44e2718ff906c4900227951aab77573af666550ec86a41cb5ebb997a71a019. 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/GBPFW2100077.
Mozart: Mitridate, rè di Ponto, K. 87, Act 1: "L'odio nel cor frenate" (Arbate)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349aa1d7abe7d57d819dbc2b1985c9d5eb48d15d9478818bfd19a989b7acc051. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBPFW2100078.
Mozart: Mitridate, rè di Ponto, K. 87, Act 1: "Tu mi rivedi, Arbate" (Mitridate, Ismene, Arbate)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3e6e8d31cd0b2d1d18b6773e80fe0ae5671188246b87f7696c1137fcae859f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBPFW2100086.
Mozart: Mitridate, rè di Ponto, K. 87, Act 1: "Teme Ismene a ragion" (Mitridate, Arbate)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e60f45a95569e10ca81feab690ec7fa44163894660dd68cf147e187635fc58. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBPFW2100089.
Mozart: Mitridate, rè di Ponto, K. 87, Act 3: "Mio re, t'affretta" (Arbate, Mitridate)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3370f259be6ac86f2cec3e34a2acde9ba6912b8a0ace10012107e852e55caf80. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBPFW2100117.
La Périchole, Acte II: Chœur des Dames de la cour. Cher seigneur, revenez à vous
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb64f03f26fd826b19bb9f9d4237e3f7c88841d33055ce0545e0ad7c065b6db. 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/ES75S1900124.
La Périchole, Acte II: Dialogue. Une saltimbanque, mesdames !
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb374edb083217bc978f782019d10f9c96af81b0dc895b376bf382ab16d109d9. 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/ES75S1900125.
La Périchole, Acte II: Chœur de la présentation. Nous allons donc voir un mari
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb553925249048fddb450a1c407fd51ca5447361dc76c78e09887fed1afec373c. 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/ES75S1900130.
La Périchole, Acte II: Cancans-couplets. On vante partout son sourire
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f644b010f9b350eb921b104864338a193c9374b36c98e6a8f2148559f7a222f. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ES75S1900126.
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 Périchole, Acte II: Galop de l'arrestation. Sautez dessus !
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152601fc73a420d16c9ccd22fe00a5640799e15a1c124b7dc128661589f0fb12. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/ES75S1900133.
La Périchole, Acte II: Rondo. Conduisez-le, bons courtisans
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a1064a71cb6aec0bab671c1e62276b5e5a1eb553373bc805cd53af5576ae0b. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/ES75S1900134.