Kim Jung-yoo (Korean: 김정유, born February 8, 1979), better known as MC Sniper (Korean: MC 스나이퍼), is a South Korean rapper. He is known for writing controversial lyrics that challenge social injustice a
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 0x1b90f119a88f1d43bfc82606f0b7c820698607df9e55340e5d9a683d32474d8f. 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/e1246968-cf72-4a51-892e-0c2ef198724a.json and https://artists.proofprofile.net/proofs/artist/e1246968-cf72-4a51-892e-0c2ef198724a.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 0xeb2443e1a14c13ab28b9380d8a657e15da1e63a700bfe3b06c9b893448c187d4. 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/KRA340905332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13fee58f8237848b5416f99c8fcd4596726e7afead767c56f3587bcb725cb71. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/KRA340905345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba0f9899c2c947574d1b150110509c8f63c014faa007c7f1ba88d45967c9494. 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/KRA340905360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9a7048a87b2b10be873342f4997384187011f6b2c6835f82f7f9fb66d1a07f. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/KRA340905442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562a60159a14b48ec149cf04aea0ec2a98307a22e5a124b7549a76553c7c9500. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/KRA340905451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db82a31dd57d4d5bfb1e444b0fe47b4b043a510a2e1c6a4083892adfb406e80. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/KRA340905487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e8062bdcaa5b6989b285e7924397a4281820fc060006e7625fbd7c2384e2e2. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/KRA340908026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75899cc5b17f7628c06b0c29fe5a5cf13066691b4d54b8c79aa6ea6a0d6e584a. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/KRA340908031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2333fcf1e301687faa551861d73b7a57d280f15b268878d05bae0ecd20f014f. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/KRA341203258.
Danger (feat. Lee-Nu & Kim Seo Hyun) [From "Vampire Prosecutor 2"]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3724f45d3ef1cc0baf76b384f8573f95cc0d2c07d853c04ff24dcadbf7539522. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/KRA381500164.
U.F.L (Unfinished Love) (feat.Vido Seoungwoo)
U.F.L (Unfinished Love) (feat. Vido Seoung Woo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012ffda8ab3029b0cf3f9aca265777a8286f37b436532e1d1dc35764c2d486cc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/KRA381500479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea35547b7d29565a9e0b7f9963902971764eb17d8fa76fa602f9c233fef0326. 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/KRD711800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea35547b7d29565a9e0b7f9963902971764eb17d8fa76fa602f9c233fef0326. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/KRD711800012.
Man, Woman Growing Apart 뒤로 가는 남과 여 (Retro Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79e15048b42598b3611d7cc24dad381ebb9e3a8f6bbfaf19066b8f25583613a. 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/KRD712300009.
I didn't know a person's mind would change so easily (2024 version)
I didn't know a person's mind would change so easily - 2024 version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c45f80372d19a2c0d2602e47c5d92bf637bde317ca0ba3d60a796347ccaeed. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/KRD712400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c45f80372d19a2c0d2602e47c5d92bf637bde317ca0ba3d60a796347ccaeed. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/KRD712400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9da4e127a6c08e5474fb612106360e6df11d48d359ecaa32b634560920c7e6. 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/KRA340906018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd2b6231689bab8e383c11379ed389ef960ab5eaab73ee9b3c5e2e37365712d. 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/KRB361212033.