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 0xa9baf6e5c8275d2b9e8431a4651f0a2ada06f6914a259075d6acda4b65e107c4. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d3d29379-5d53-49b0-a001-c968c32353ec.json and https://artists.proofprofile.net/proofs/artist/d3d29379-5d53-49b0-a001-c968c32353ec.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
El trust de los tenorios: "Te quiero, morena" (Un Tenorio, Coro)
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 0xb38eb4124c76e81ec923de47a6b16650519f3eece2b20263263d4f817c9ddcac. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/ATJC92400101.
Luisa Fernanda, Act I: "De este apacible rincón de Madrid" (Javier)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4f4045d6ed8c406abc065782e303e01e803310785096c34d9fc6d922ecc04c. 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/ATJC92400102.
La alegría del batallón: "Aquí está quien lo tiene tó y no tiene ná" (Tajuña)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12311cbe3f67781d38770339572e6974f0e5fc20e8ec060423181a767fa5618. 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/ATJC92400103.
La pícara molinera, Act II: "Mi locura… Paxarín, tú que vuelas" (Juan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8afda08eab1ec8f30f9fa44a025456f214b1b8cb3d9e7b4343b6852425b1e7. 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/ATJC92400104.
La bruja, Act I: "No extrañéis, no, que se escapen" (Leonardo, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861d43749b8b2ceeffbbeeec8119ad9e512dc22f91d5ab6859be3524069aa9d9. 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/ATJC92400105.
El milagro de la virgen, Act I: "Flores purísimas" (Mateo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c75fd4e2f4a63241909bd914def5e468db22f4c918ac1ff0717f14cb5efd5d. 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/ATJC92400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075294902436ca96ab0b6a625b375f2dc0044feb05bf76a60820d1fc1779114b. 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/ATJC92400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e689996fb51257b14884cf8f774e2120fb5e118642179adc1cc22031772bfea. 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/ATJC92400108.
El último romántico, Act I: "Bella enamorada" (Enrique)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57961a1558a841d86a884c3216a33735b57791b5c8adfeb115242e91a9be485b. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/ATJC92400109.
Alma de Dios: "Canción del vagabundo" (Tenor, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ff2fe32def6c0ce43f6afc4a5528a5235cbbcb2d9fdf1d34a31911e9a3d6cc. 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/ATJC92400110.
Doña Francisquita, Act II: "Por el humo se sabe dónde está el fuego" (Fernando)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528bb9cc88ba902be67842cb1dfb14ee8d6673a5bd93f9cdd405b01c4439dbf7. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/ATJC92400111.
El guitarrico: "Suena guitarrico" (Perico)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef60e3b7d61335fda3ba51d7df4262d8ca2a3d3be26939523b3b8b2b5d72f03. 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/ATJC92400112.
La tabernera del puerto, Act II: "No puede ser" (Leandro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9bede7cfdd3d70a8a0bf0e92a27f831d63f4390ba560fdb842ac64bf12d811. 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/ATJC92400113.