Yeom Hyeon-su (; born April 20, 1984), better known as Yumdda (), is a South Korean rapper and former VJ for MTV Korea. On November 25, 2020, he and former Illionaire Records artist The Quiett establ
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 0xd95aec95ae7660448e6ce96a4c8381c11040ead65190bb8b09ac00f0293b48ab. 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/8e3dd991-6a81-4334-a808-1e1dde23855a.json and https://artists.proofprofile.net/proofs/artist/8e3dd991-6a81-4334-a808-1e1dde23855a.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 0x8388704ac3bf5247a3b4a57001dbb98ce3bb16222d3573cd97be795509c94dae. 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/KRB471600229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27631be14b31435dd9cd9abe44ea3ddeb6d55317cb20b05cbb32eca5685b0c39. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/KRB471600230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ab85de0b81c1d62de5363430a87833f801c53de40803a4b4a1d3db3a30a421. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/KRMIM1900292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c695250f4dcb85b3a948ba5bcc91e04e5872ae97ed5ac1b22e51153cd3779e7. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/KRMIM1815853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd37ed2e54debf5b5f91db981e33c4f924a480199a51e6e25b5c563b4727aa5a. 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/KRMIM1903997.
Class of Lies (Original Television Soundtrack), Pt. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed831cf36279101269b40d9fede947e6641247ba980295f3139a34cba99b124. 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/KRE131900111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c96812a3a78d3b86cd2ebf829789711d7ed91d98f8ea85a38097792a7af160. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/KRE131900112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15345d121b8502aeefcf5c8fb5e1785d2cf44826ee5c6529d6f8b18be3521c44. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/KRMIM2018633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511a0da3f7003500f6ddfcfb2cd055948b05d9ff25d6ea20fa872444598b4f4e. 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/KRC532000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c472e564c60088945645085f7a02c8da5565dd450287c2cc3580aeeda98348c. 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/KRC532000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee48f3d566cfab65582a35a51f8e02f502325256115aeec30238401b0d84e6f2. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/KRC532000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94b1d6f3615442459445aa8ee6b9cc3f18119d1e85aa33570b3a4849d9eca1d. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/KRC532000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f252e20ce9ab8beedd8531ce32b59e5d30c19cd399660cca5f71c6d750c2ca. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/KRC532000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbeaf5b7c10deae2bcc13e5f48e8c30b4728790bd62aec476260b45537c0958. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/KRC532000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ce971f559f00ef29a08b9648863e6917f990032c4ef4e5d80309ac9182362d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/KRC532000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb908807eeae8ed9251095133fa378c1e5835b5ee4b1b5573c9c41d6f468ae1c3. 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/KRC532000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e56222d340500e04056e0e0b0ff82fee53caa10a2e0a340b55ac04379b8016c. 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/KRC532000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61a90a59a3243aef10b8d1e653b6023bbd3389111d35503e51ec9567f18825d. 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/KRMIM2026942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66441a7d9cd5c56f1f07877e1a58cada074dea80c0bb3a3d1408e84c9b2705fb. 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/KRA492100170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c84f676aeed4d805b24924e6c801b88d8aa6a70a131aa190a469c2d9d3c058. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/KRMIM2135588.
9ucci REMIX (Feat. Paloalto, Jessi, UNEDUCATED KID, The Quiett)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9744c22ac14dd5eb695bbf7a938f8cd1706e2e7a717d4a2981f22d6cac7d50c2. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/KRMIM2205088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fac0832ef4cc5b8c17e338bedeb825813bb110ac9d6892dea19d1438b8f9dc. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T07:36:28Z), 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/KRMIM2247156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376826d7a1ce96a24a809eebdb8c5515a667bd1830c05dbbf721942889a4ae05. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/KRMIM2303451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15dffcf746f2a424d6e7a28dbaf01aa35afeca40c4c0c46540fc158284e3dcf1. 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/KRA492001570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd920c12a066ef3c12999731c8c1cfde152edf6386815a37fb237d3fbcaf6ae. 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/KRB462000530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70b8adbfa45150972d6c9760df2a18460b06e3c3a22dfb1db2d9f2c2435491e. 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/KRC532000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5c53f2af5e75e8c9002941d26b3138c0879184fa3e1ac59bd74f9933913ec0. 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/KRZ291817102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d8390736338c3808e6ffad7bfa30efe3d27c7c73818f955bd27c270f093e19. 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/KRC712100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5284d5332495c19602eba7814dea1c8f58c7ea64df7403ddb13008aaebc3583c. 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/KRC711900041.
Kiss (Prod. By taalthechoi) (Feat. YUMDDA)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3cba2e499f5280f995f9d6df63f668d46f47fc5f5f074d55c1def2871716e3f. 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/KRA381801287.
Party People (feat. YUMDDA, Uneducated Kid)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf21752057816fed3d4e02a0fbc2ecf087b56a69591a2c3fbb5d46c264cff1d0. 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/KRA381903788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbfc4eb7b2eb424e8a1a33d65069ca0adf87a30bfb3757cd6dff66fae6fe091. 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/KRA381904335.
gganbu (Feat. YUMDDA, ASH ISLAND) (Prod. TOIL)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5269c1bc73f619f37c6f9b5828aaf9cec6bc8629cfa1e851a460ed660e9cd09e. 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/KRA492101299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e974ba5c756d247ec4e7e426d74949fff2ea6cadff0c9e4d2e8fad2bd7e7f4. 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/KRA492101243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad7dc071f9af161eae71ba1fc63e5fa9aed741f51a2f1dac03f0af4f6ac9bad. 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/KRE132200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a92946fa11664e6d853a656a0492b2b3909bc4730e7d199d441cbdd2f47c99. 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/KRC711800054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4b0d02b6d70c56fdaaf8721af26d7bacf569c3aa7b4009b0dc611bb17ee3e5. 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/KRC391800055.
Forever You (Feat. Yumdda, MUSHVENOM, UNEDUCATED KID)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de760156f1a1add6f78dcb75608aed85b461dcb7fac8c9183757cc329a9d778. 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/KRMIM2116342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fce4de6978f86ac6f21edaa34a017174f3f2caace91eff1c5d3102f1abe19e5. 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/KRA382400465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70b8adbfa45150972d6c9760df2a18460b06e3c3a22dfb1db2d9f2c2435491e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/KRC532000037.