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 0x654c628e79736f712227c6e843e7ffd6063e77163b72d0106b090c83f84836f7. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dbb58a5c-4c3a-481f-9f69-a3a0759312dd.json and https://artists.proofprofile.net/proofs/artist/dbb58a5c-4c3a-481f-9f69-a3a0759312dd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x552be950b5c7cf08c0855b1521c754f7c1f8d79c203e1fccfbb40adb7f52f988. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:21:42Z), 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/ES7731508026.
Mi Corazón Adopta Todas las Formas. Muwwál Modo Síka
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bd170f895c05194c6183d09a8786f60ec6daa352b53953af86b338b1ca438d. 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/ES7731508027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84c0209a5a2772b1170bd2efe3cdf6139796c925df495ec56805ab51a8e5282. 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/ES7731508031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ed4c2a26a35ffaf411425abe7980ad901b0555d6aa3bc1e5258569c936b477. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES7731108021.
Al-Andalus Abre Sus Puertas. Al-Andalus Opens Its Gates
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665d147ba33fdbd4532ae4f84e62c499983a46d70cbfb8ed74140526bbe340e7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES7731108022.
El Camino a Shaqlawa. The Path to Shaqlawa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286c7399a865733c8dd6f6319f7090a6b49d438778c8c5402468f9e5260b90b1. 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/ES7731108023.
La Sabiduría de mi Abuelo. My Grandfather's Wisdom
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9e9f0b9f24172394095ea67bfc27765c5288f6ae60c6eba60ba8d164838b48. 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/ES7731108024.
Nostalgia de Córdoba. Nostalgia for Cordoba
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f55542b2c779b6f291034336e710ad400db8fd8fd0b27b956d881d846852cb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:40:26Z), 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/ES7731108025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb8e94afae0d0ea88dc0233629c7332ec080158f9c0fb1d0a3a2ba9561fe1f2. 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/ES7731108026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb8b5c2427ecb38877dd3c522cc6ee679b440df099a780832984dde85ed5a83. 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/ES7731108027.