Felix Delgado (born December 18, 1974), better known by his stage name Cuban Link, is a Cuban-American rapper. Emerging from the underground hip-hop scene in The Bronx, he came to prominence upon disc
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 0x67074259fc128bbe95623edcdd667a1467750f1a89a13326987da638805cab22. 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/f368bc65-8807-469e-bb7e-2bbc2442725b.json and https://artists.proofprofile.net/proofs/artist/f368bc65-8807-469e-bb7e-2bbc2442725b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The X-Files: No Mercy For The Weak (Hosted By DJ Daa One)
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 0x4500ff13c509b8a6fb65d6b885e1bdeffc338d10c4b758832b42ade902383de7. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZFZ22267494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc700ca7cc99445014189d7a90dfbf60fdaf3cb72ad5afae658091d15e0888497. 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/QZFZ22267504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174a6cd95648268085838debb3122ac83c28423f4228294e6a5bd26f823c3246. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZFZ22293067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b0732993679d88cf77f82d576689477313628045d6d30c648d3de647ef3220. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFZ22290102.
DJ Flipcyide Presents: The Best Of Cuban Link
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b0f79b92f457f6fcd2eb544e59e33699c01c652076602b95c1740a06c8579e. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZFZ32221808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d91f07752915d4d4f42bf4bca5fa337b464373e41487f10b7c7e07baa7c624. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFZ32221811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed98c568f3b1711aa082fe9b819c2641eaefb46febf2fc1d3da9bfc2293578f. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZFZ32221817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b19d3808dc1695f34e776adc30e70bc2a828f8b7daf9b136a555b9c05dc47d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFZ32221821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573489b973da593008e367eee62999ffdd837529f731f27e79c598a2fed760bc. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZFZ32223453.
The Machine, Vol. 1 (The Forgotten Boro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98926bda74f40780f6234c84e565b18084b8fd4e49f774cc826f496b40540a0f. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZDA82200280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b223f3bbc773a12057d28831083c3ebe7d8646d37504524719a6e8a87d17d0. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZDA72297247.
Letter to Pun, Pt. 2 (3 Sides to a Story)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d169b792b5fe6f9576628846d834bcc2c3c3e222712e53e601d7ffc1fe149e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY42309575.