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 0x670f81efb1329a3d07a07f2c7c423675661efad414b55822acc048a084b85cfd. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/95dd8b91-c369-44e8-b9d1-5f67979ac2d4.json and https://artists.proofprofile.net/proofs/artist/95dd8b91-c369-44e8-b9d1-5f67979ac2d4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La Taberna del Toro "Estampa Flamenca": Canción y Fiesta
Suite Iberia / Fantasía Galaica / La Taberna del Toro (Antonio y Su Cuerpo de Baile)
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 0x2c72bc6da626193c2e8825a5a762627294853e58d6a2929f0fcde44df01bd24d. 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/ES5271003410.
La Taberna del Toro "Estampa Flamenca": La Caña
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2672eef2f1473662ffe5abd5af7df6e8110486e98bbd30f5dc6cd5334a9087. 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/ES5271003415.
La Taberna del Toro "Estampa Flamenca": Fandangos de Huelva
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad1eec450f4c3593ba8d3366b786d86533cf039078847e0c64ad4e1f0addad7. 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/ES5271003416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe0327435de6b255a476442f1feded661e103718a5584628df38bea3ab694bb. 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/ES5271003417.
La Taberna del Toro "Estampa Flamenca": Farruca
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1152258ed30c3fcd5e57fb3945dff8734f3a415a98fa1e8379066d2259b4af61. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ES5271003411.
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 Taberna del Toro "Estampa Flamenca": Tanguillo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b5940c63085825f09f02cdb03d3bdcdbfab2be7a03e7ede47a5019330c1f4b. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/ES5271003412.
La Taberna del Toro "Estampa Flamenca": Taranto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77143472f93734d9eb677baaf1091d5af4d50cb22520df138cba661c645ace7f. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ES5271003413.
La Taberna del Toro "Estampa Flamenca": Caracoles
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bc8ce890e9b8ac2d462f7933f518cb5679af3d92ebe1e0e3ac842e83c81ecc. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ES5271003414.