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 0xbaf523481361dd35f93374b465f1073b8d171eb721091144cddfed2dfb4a878d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06cfa27d-8bef-4921-a293-bb960b51e46e.json and https://artists.proofprofile.net/proofs/artist/06cfa27d-8bef-4921-a293-bb960b51e46e.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Cante Flamenco (feat. Justo de Badajoz) [Mono Version]
Vintage Flamenco Cante Nº20 - EPs Collectors
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 0xe21001a9bb19cce804c39da1dd6f6a12bafd4b1ffc2915fe160f97d660122984. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7580700105 — a six-check JSON result.
Tu Mare Con Ser Tu Mare (feat. Juan Salazar, Porrina Hijo & Antonio Arenas) - Tangos del Gurugú
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf7ed3703fdd9a53ced4cc1596042f2c5f2459b889650a6d59106f18d638d2b. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7581300918 — a six-check JSON result.
Grandes del Cante Flamenco: Porrina de Badajoz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21001a9bb19cce804c39da1dd6f6a12bafd4b1ffc2915fe160f97d660122984. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7580700105 — a six-check JSON result.
Grandes Figuras del Cante Flamenco : Porrina de Badajoz
Figuras del Cante Jondo: Porrina de Badajoz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc999ed4d0b4761b7d82acdbc71a075870527010c7b5be8d8af3369aa20e41826. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7581300913 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5875fe1e75bd2f5752d73d43ea73e3f4a97473200d656c36150c3c80ac4f64. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7581300886 — a six-check JSON result.
Que Cuando Va a Volver - Tangos Gitanos Portugueses
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21479121bb6a2e3ad378de271a33a96ce311e47b7091ea2c4d9caab903a71a95. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7581300887 — a six-check JSON result.
Tu Mare Con Ser Tu Mare - Tangos del Gurugú
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf7ed3703fdd9a53ced4cc1596042f2c5f2459b889650a6d59106f18d638d2b. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7581300918 — a six-check JSON result.
Toitas las Mujeres Llevan - Fandangos de Huelva
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a257c69085a28771953489dc6a8f04e441410f670ccd98f8decb7234b8e3e86. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7581300894 — a six-check JSON result.
50 Años de Flamenco, Vol. 9: 1935-1985 (1ª Epoca)
50 Años de Flamenco, Vol. 9 : 1935-1985 (1a Epoca)
Great Interpreters of Flamenco - Porrina de Badajoz, 1920 - 1950
El Que Quiera a la Malena (feat. Juan Serrano) - Tango
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1e518d70f33d97182ea8cdb53fe50d7c7626e1dbf6986ecdffe008bd18097b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GRHR11159001 — a six-check JSON result.
Ha Tirao una Perdiz (Fandango de Huelva)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a681f8cf4b5e0525fcf68f9a4032ea3abc53c88cdfe76c0cc3d7dfdc5f3a66a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271103002 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4201aea4d13598364bf624d910b7ba50646e3a425d4160f8a2b5d697d77992e8. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271103022 — a six-check JSON result.
Grands Cantaores du Flamenco Vol. 21: Porrina de Badajoz
Porrina de Badajoz, La Época Dorada del Flamenco
27 de Sus Mejores Cantes. Siempre Grande y Noble
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33016f5e9ba3e9cd2dbe180be3614157ed6f0cd9ae9821fa2af1167cd74e215a. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES88B0651303 — a six-check JSON result.
Me Tienes Que Echar de Menos - Bulerías por Soleá
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb60a781dfa72a82e26088a74755c58f23721f6332b556dbe45cdd27699f697. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES88B0651304 — a six-check JSON result.
Calor Flamenco - Porrina de Badajoz y Su Flamenco Legendario
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512a4c7daa891abaabd0c975eedebcad2fa2a3c5d2c2dfda2fb6b158c0d28f13. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5087600185 — a six-check JSON result.