Jo Dong-rim (; born March 25, 1985), better known by the stage name Mad Clown (), is an American rapper, songwriter, and record producer. He debuted with the single "Luv Sickness" in 2008 and released
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 0xe97af1f4b0eae6f23fc3791f64d0615bdcc68dc365901b553f3afb2606190b13. 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/4de6aa95-b4b9-411d-acc8-9eda0a251c06.json and https://artists.proofprofile.net/proofs/artist/4de6aa95-b4b9-411d-acc8-9eda0a251c06.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Descendants Of The Sun Pt.5 (Original Television Soundtrack)
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 0x183e74b1d153c49b9104b34fe91ff78f1589c6d8c33ea819119c6478b31decae. 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/KRA341613341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736f9c82bfb58ab3ddbea3a5ce212055fd35d3dc3809c67a7b68d818dc7fa7b7. 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/KRMIM2129893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb34de899af871c836f92c7f0ac5b60b1ab54737ca21f4c8288acefe3e165064. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/KRMIM2129894.
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 0xf633868dfeb91d1d1991ece624dcbccedc6c87d016d0bc7d9127fdf732084c49. 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/KRA381602424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b729d383acbcf3cf9cf686df77410b19fa385424218d17ba20dc54331f708e3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/KRA381700558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd9989ca99914717dc601e6ff125b543bc87c0743aacb33c7728b61b64490d6. 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/KRA381700260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c3f47c7dc798c99f691940542c27accf01478d8708553c1b42213fc69beaf8. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/KRA381700559.
Bad Blood (Common Cold REMIX) (feat.Justhis)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06d1fc6c9d9503d02569e9406272acfa4f980d4b98630c42d4ae712cf5148bf. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/KRA381700560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7927d2f78ed9d575f6953a049674e22f81e8693db75053cd6a0687095d807d9d. 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/KRA381211077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c975d09effb21eba95a45a100952e8ce94091f494d9c3a36a90ae0727a673e5. 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/KRA252200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb60a101d900df4533ecfa05278c2859a14090a5e90d1a667f03592ceefc8191. 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/KRA381702785.
HIGH SCHOOL LOVE ON Original Sound Track
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3461bd82ede1cf1243647b09833ba0ba02dcce3ea61491f90afd30a9347d7186. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/KRA381209541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c855c81038221b75d329b46c7f8851872b565c8d4a7eac5d3b05fbb64330ddd. 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/ZZA0P2217037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53870a16a6e1a3c49572307d29c921a91e79e5e9f1034acae860f57bb6dbe6b. 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/KRA491600730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03621b3ec5696486953432df822547c0e172621a4c9436b7bef2c848548c26ec. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/ZZA0P2217046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190beae319454c0df964584ace1f1de8c03e35225d49237077c0ff45e16a5a89. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/KRA381209548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a213500489bd17858623010c5ffe2443865583f5725ce7bfcefa25b57b19a0. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/KRA491900833.