Di'Jonn Gary Grizzell (born August 28, 1985), better known by his stage name Jonn Hart, is an American singer from Oakland, California. He is best known for his 2012 single "Who Booty" (featuring Iams
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7808ab1c5bdec4ab68981a9a135b9e1c2aa0c3dfc77dc35e5736137adb00a26d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7fa3414-98ab-4921-9a28-4fccd016200b.json and https://artists.proofprofile.net/proofs/artist/e7fa3414-98ab-4921-9a28-4fccd016200b.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76fa20ed4e1737c30c4b5f963739942a6ebe98522466a63a4a0d2b657386c30e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUYG1425568.
Get It Girl (feat. Problem & Iamsu!) - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a5f9fb7107e0f219cdc72d338b94eda2a9d1375db69a32acde7b814bcdba0c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USUYG1044684.
Who Booty (feat. Iamsu!) - Jonn's Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91d9ad678a929e4cbd5663a332618cd67acfe50d86324c37f678c65a5dbab7c. 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/USUYG1425570.
Whistle (feat. Too $hort & Juelz Santana) - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacaf0c3d9a86d624e1732e478538b010bb30d5f27dcdd1775838868ef79ed894. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USUYG1225190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c978163d215fa30ed68f975007a4ffac2e39593e891bed66181c96cb9fbbc1. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USUYG1050363.
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 0x6058cc4757cda2cdccae2444969f7f1287d406ffec9a47aca63d9707853e899f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USUYG1126349.
Pledge Allegiance (feat. Sage the Gemini)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f76d0ae4d244d96b85c383385dda3a6137b80685932114c6d4c599fc68d7eaa. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USUYG1277538.
Fed Up (feat. Rayven Justice, Eric Bellinger & Rossi) - DJ Hed Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611ee82bba1032e3147779d55ea9e34cc5b8c3d3eb3a6413540870870e63ca8a. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USUYG1079055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ecc9c50bf75e4f2b8ee1f67b4542412059a4680d2a3d694245be130f1c5b51. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USUYG1094760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47fa99537f8ac4f76c01dde98c6ed79edff5197aff12cb2f080cf9e40fb6605. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USUYG1056262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a95b71e57f1cb2b241e04ed6b09ea1f3c472890b03496fef4ccffc117bdacc. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USUYG1042438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98c53563998079f29c94c009f997085850eecda6618a90a7a201221449756cc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USUYG1225655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3ec37f928259d4163cc94a29fc52fee5a205d6f0d9ace558490a801f259af0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLD91738558.
Yo Pussy (feat. Raw Smoove, D Lo & Jonn Hart)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d78940f0727cc99e6fa78c183010946be4533481832f8f0a858625877cd340. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCACU1683751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4f0e8a65cd9035ff7896f732b912126dc1b45f45a426ccf5d79869ab802615. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USUYG1278727.