Keith Carter (February 26, 1970 – February 3, 2016), also known as Big Kap and The Wardin, was an American hip-hop DJ who was born in New York City and was later based in Atlanta. Career In 1995 he
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 0xe241d8f983deb93522baea3c9c4366610b0c7d9189e63287e6a41b1f50a74c18. 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/26c2c4f9-94f9-4ef2-ac1e-f3a7031cfa73.json and https://artists.proofprofile.net/proofs/artist/26c2c4f9-94f9-4ef2-ac1e-f3a7031cfa73.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 0xc8af63b87aa3fd5b7dd6384fdd23517d8b1128eb6a730c4fbcdbe03108131bcf. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/USJ3V1451666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ae6d8fc3376acf1228acfb4d9f51324743e22758921a2f36ab5a8b7fe56f33. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USTV10100142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ae6d8fc3376acf1228acfb4d9f51324743e22758921a2f36ab5a8b7fe56f33. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USTV10100142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304f25347b22ede5b785b0b7c664b129eecb952fed809b7ea35221f6a5649e40. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USDJ20110296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5564ad1be081bfb47f7f75951e8e04b59ebc5833962014076a442fcfc94338b2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USDJ29905250.
Biggie/Tupac Live Freestyle (Funkmaster Flex & Big Kap Feat. DJ Mister Cee, Notorious B.I.G & Tupac)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0867ddc71c0ea9ead879727c20ad85fb42ca687339723f3d36a2d2ecd93e3511. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USDJ29905252.
We In Here (Funkmaster Flex & Big Kap Feat. The Ruff Ryders [DMX, Eve, The Lox, Swizz Beatz and Drag-On]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b3fae5a9d9fc54cdc5112b699ab0a29fbaca20273f2815b8bdf2b1aede5dc4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USDJ29905266.
If I Get Locked Up (Funkmaster Flex & Big Kap Feat. Eminem and Dr. Dre)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e11bb0587eb4ead7ee2311473490d1afda7378486ea3f424e3e99f1a31e5eb2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USDJ29905258.
Real G's (Funkmaster Flex & Big Kap Feat. Snoop Dogg)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207693610df99b695712a90173d82ad50c892eb8dffea23d30a18038c42b176a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USDJ29905262.
True (Funkmaster Flex & Big Kap Feat. Method Man)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad497396eccb454d9573e33ac6f7f2e72d41a6fc870cbac3dca741115d7fc68. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USDJ29905270.
QBG (Funkmaster Flex & Big Kap Feat. Prodigy and Kool G Rap)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf51d35bec22dacdfc1d9dbf9b166045bf9b65d98998ca8ff0ad7e7fae48412. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USDJ29905272.
K.I.M. (Funkmaster Flex & Big Kap Feat. Lil' Kim)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76556b966501e18e2cd92f9d27d1bb052360e9d019f743f3d23b986b3097e64f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USDJ29905274.
Confrontation (Funkmaster Flex & Big Kap Feat. Mary J. Blige)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e52c652cda26fd0e3bec820d80a6c3305b995c13c73272a6125bb86d4ae168b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USDJ29905254.
Okay (Funkmaster Flex & Big Kap Feat. Redman and Eric Sermon)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f7f85873cfb110d71b9ae2b54513b99d42628dafcd26821c16fe13b1f8c7a0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USDJ29905260.
Dem Want War (Funkmaster Flex & Big Kap Feat. Raekwon)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aff047831526f21000b59b1f0ed4cdc432cc281b687998e9f53f71b772a76a2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USDJ29905268.
For My Thugs (Funkmaster Flex & Big Kap Feat. Jay-Z, Memphis Bleek, Beanie Sigel & Amil)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56dfc792112624621ca521a6fdfeaa6bc5deb27b1d62549f40323d76cf25972e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USDJ29905276.
Wow (Funkmaster Flex & Big Kap Feat. Angie Martinez)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0a062dea1277335f42efd31d8553dc0ac21f1d0a5686eb7cc2758acb605e1b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USDJ29905278.
Respect (Funkmaster Flex & Big Kap Feat. The Cash Money Millionaires)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01df9797a0038e56871801a0b56a52c29faeb7cbf677b8ee4e89b561d6e843b0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USDJ29905264.
Ill Bomb (Funkmaster Flex & Big Kap Feat. LL Cool J)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba103ecf3dbdc81fe14a95ff97ab15ef730347661c1a99beb88e20801b5f4be. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USDJ29905280.
Def Jam 2000 (Funkmaster Flex & Big Kap Feat. Fat Man Scoop)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcb3fc2c884b491d2bd07c74c31fccdbcb4097ab5fa79535d7cce84a22c0e71. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USDJ29905256.
Thuun (Funkmaster Flex & Big Kap Feat. Capone and Noreaga)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ae4dfb3c52b6e433bbb9c6efd7fc4d851805d8507ec43b14aef4242aac00b4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USDJ29905282.