Juan Martínez Vílchez, known as Pericón de Cádiz (20 September 1901 in Cádiz – 1980 in Cádiz), was a flamenco singer who was able to recover different palos (forms) and old cantes. He has left valuabl
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 0x36940d75ca9009f97e31b78d1d41ca307791ff4b5d06b28615fe7791f5323775. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3329fd1a-a873-4603-b805-66eb59792ed3.json and https://artists.proofprofile.net/proofs/artist/3329fd1a-a873-4603-b805-66eb59792ed3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Espagne, le tablao Zambra de Madrid (feat. Paco Laberinto, Roza Durán, Perico el del Lunar, Antonio Pérez) [Live, Mono Version]
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 0x6a56d111f4ed4e91db0645994b2cbf91b3c62465ef4482c82b38045e90df2f79. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/ES5150801575.
Subasta de cuadros antiguos- - Tanguillos de Cádiz
Magna Antología Del Cante Flamenco vol. V
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75fdfab89640b558ae4b4bb2b4f26e4b5d2e2357bdbbd5d372c19c98d929ad4. 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/ES5089800125.
Grandes Clásicos del Cante Flamenco, Vol. 23: Salada Claridad del Compás Gaditano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dfeba265724faba2f279009124ac26e1b886369d23f1dc3990c25a40c36a46. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ES5270101808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dee10c639ee5d11443132b5cd5d78b18c338a71310af217ab34596d23e7d026. 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/ES5270101806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7028c33d8d67de734d520915faef2d0b620c77f4778b025e5bb6ff7be860ec8. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/ES5270106007.