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 0x5122c77763ee10977e3cd94f3d29bc0de49cd8ad3e88fc2e3cae9c6b3b068747. Chain 2 (Bitcoin): anchored in block 953980 (2026-06-16T17:16:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c69c06f-ba3a-48d2-871b-0cea3a48fba1.json and https://artists.proofprofile.net/proofs/artist/2c69c06f-ba3a-48d2-871b-0cea3a48fba1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dolores Ay Mi Dolores (feat. Cuadro Flamenco)
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 0xc0caf615635eaba956d46ad636cca928785a376df1813b56202a235b7d22d184. 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/ES5271003201.
A Este Pueblo Sevillano (Tanguillo de Cádiz) [feat. Paloma]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9be6004dc65c92399c537d5e454d043ad28ffd3b90f82d723aee4cddaa5ea09. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/ES5271003202.
Aires de Farruca (feat. Bienvenido Amaya)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b30dda743df4a6f6c2df1880e58265422edb8eff8da7bf39b37a7c8b0d839b. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/ES5271003203.
Tiene Su Equivocación (Soleá) [feat. Paloma]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7902a98d6040407aed58551ec091e30a87a86cdd5dfed7ab2509cc0a6c60efbc. 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/ES5271003204.
Aquí Está Mi Corazón (Fandangos de Huelva) [feat. Antoñita Sevilla, Mari Carmen Altea & Pedro Romero]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bbce7d4ced83405fc3551e679ccecaa6dae99e33b30cc4d27c51a61c680da6. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/ES5271003205.
Sería el Quererte (Sevillanas) [feat. Antoñita Sevilla & Mari Carmen Altea]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009395011dfba5420433f1124acb7c22b5e8f32e4f0b4f5eaa4b033fa2f0a40b. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ES5271003206.
Alcé Mi Copa de Vino (Rumba Flamenca (feat. El Jose)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5686751347caafded85eab3c2bda0d84329279e4eed22939df03c2bca67cc355. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/ES5271003207.
La Escuela Flamenca (Villancico por Bulerías)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c870e8ca344ca35cd64d4b477570a0228829db68525a4fc8cbcc223885f5678. 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/ES5271003208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75233a0838dd6ed9640d2c85512481da4ed1989829ff0dfb432a3cb5a9fe6401. 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/ES5271003209.
Yo Soy un Gitano Fino (Rumba Flamenca) [feat. El Jose]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb692adb720bca0fe7ccf4122cebf8f9e0e9f469e788571c117422d0638dd94da. 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/ES5271003210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb6982e58539d215fd42b3947cc266fe64ed90532a53afb1261539f22cfce11. 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/ES5271003211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26dbd3f19406fdaa04001756516336afa9b5670fd3d4f42d2df65df22047a910. 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/ES5271003212.
Aquella Triste Peineta (Tangos) [feat. Mari Carmen Altea]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f7b5c397dce1d676486fac07a6b68894b5911d260f0d7a7a0087542feb9193. 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/ES5271003213.
Paloma Sin Nido (Rumba Flamenca) [feat. Antoñita Sevilla]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048ac248cd5213e4f71976ca818d170ac68d91601f04a7f080143514ffdacef0. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ES5271003214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39705477283ba7c83d857b62bbb0f3382774a0490d2d643e057493acfbecc839. 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/ES5271003215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff49a1eef5f09ebc75915f54b19422a3fb6bc2b780f0856d8423c24fda39a70. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ES5271003216.