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 0x7b2058de90d248016409049e86ddd4d861dd04b096ac18e7223c4cafd60893d7. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9b87993-93e2-4063-8641-e114ba0436ae.json and https://artists.proofprofile.net/proofs/artist/e9b87993-93e2-4063-8641-e114ba0436ae.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fd59108ac71d0e123d82197fed1d52bace93e53164c7622b7ac9847d8b605e. 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/ES5270702702.
Vidalita Dedicada al Niño Marchena: Brilló un Día en el Firmamento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4550d44bf9b3675ed9a240984825973ad867bde4eb361ca12aa0db7dfc68ea13. 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/ES5270702704.
Malagueña Con Rondeña: Que Me Quieres Tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c0e7e05ae1497e1befcf9c244ba5b283eb8c39b92132b214ba00f35a41de25. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/ES5270702706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cb3c4be6e0a41e57b0cd872fa84f3405a7763cfcd840451009f42e4a0e5bf0. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:25:52Z), 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/ES5270702708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c64246195975ced0266e58773891d599c1d32d438b256e851571043cfa0f87. 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/ES5270702711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97244e9dc5f6862d84cb24023de6bc0957b4088bc3de4907cfabbe2503122bc. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ES5270702713.
Fandangos Estilo el Sevillano: el Camino de la Vida
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90b8b2b282dc6cac9f2d59ccd58634e4dbb1a483a4faa5eb2b7cc0cd10c3abb. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/ES5270702701.
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
Bulerías por Soleares: Tu Te Tienes Que Quedar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e82d1b983108346d88d51b8ea76983e1b7cd6eda490cf2e32507eb96ffca2b1. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ES5270702703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0024585cddcd14ef9462458ac74eb9f22fb05179d290753da95c4352c7650dab. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ES5270702705.
Fandangos de Huelva: Te Quiero por Lo Chiquita y Bonita
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80daed30ad0ad0db9254a1e95f02a48d1de5b0146b2bda750269466b227d5cc2. Chain 2 (Bitcoin): anchored in block 960231 (2026-07-30T08:33:28Z), 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/ES5270702707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8440d8381795f8fd0f3ce87a9d230e9d59e2f2ddfee189788b25005dd8e11558. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES5270702709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c408df70ee8fc7dc697c5c7491e0479c07e8330dc805aa69c30de809b44e00. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES5270702710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bab444010ad05484d791bd90afe79880244f54a6d9ade0011ec7aa094031ad. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/ES5270702712.
Fandangos de Pérez de Guzman: Con Cuatro Jacas Castañas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929e1c5997d3327f90ef19a61e431f61b5a9b0d31783c1ee0804685a101fbf1e. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ES5270702714.