Gilberto Perez (1943 – January 6, 2015) was an American professor of film studies. Perez grew up in Havana, Cuba, where he was exposed to an eclectic international mix of films. He is the son of Feder
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 0x84ebfc66e94c0cb5010c85f9ed6ed90ee65172ef8d905a6b5a9ef69cbc64d98d. 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/d9f7aae2-d326-46d7-befe-ab04a0123abf.json and https://artists.proofprofile.net/proofs/artist/d9f7aae2-d326-46d7-befe-ab04a0123abf.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 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 0x1e9df5e697cec7783adfde2f5b8f52e008810fe325c8c17fbdee99abb8a74764. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USBWE2012749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796b3c2ba803caac42fa06906c8873aa3f3de148cf56414e95905e02de7da474. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/USBWE2012760.
Morena Morenita (feat. Los Dos Gilbertos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7948b619e5adb9851faac03ca91cf1202c56ea83f4e380bc786ea0f271e5b6. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/TCACS1629354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23d9f16e70d132f985c2c7d8a22088be8cce467e83e38080a2b03b5aa6506df. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACS1629356.
Cuatro Cartas (feat. Los Fantasmas Del Valle)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdcb999dd48da1059171d00558b24c35968c67e8339d97dd0c505a704573cfe. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/TCACS1629358.
Pa Que Me Sireve la Vida (feat. Los Frijoles Romanticos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb35bf0a162bf6be7dd268121580db503d8b1aff98e720db65e8de5416ee065. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCACS1629365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a404127b46ff748630e1156dce8282dd74898409ece8fcc8d0993aa72f70bc. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLZJ1764130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf6b252b63e78e5a5e7335f83e4a845ff6f4563298b51e18ff4b5087ac5c126. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/USLZJ1764135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3daa121dff39b6e38b47aa2ef29b35e0bc2dc1d7feb6eed2d48a1f34628f82d1. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/USLZJ1767532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387f593ba6a045c70d4e987645bd39e79c9d96527e2e1dd806574e4b630ebddb. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USLZJ1767536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ec3965d10ef5586e1d2bfe057431a37d72dfb1c72868c289608bd1d2b51ad6. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLZJ1767538.
Gilberto Perez... 40 Aniversario Ayer, Hoy Y Siempre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62116478a445cfb1f104f50dab654a2202aa035638886267f1141a731b509063. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UK6822107447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda82fe1509f5642c857ff9bed3143400ecbfdef3d053f1220e20979e83101890. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UK6822107451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d51b3b7274863b1d585ec312ccd5aeddc62c257a76f0f39c6cc6f7be33932b. 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/US78T0754391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8396e5ed1f1c2d0eb91a031bfdc615e527c118393585021514d5618eeb812d8. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/US78T0754397.