Kang Young-hyun (; born December 19, 1993), known professionally as Young K (), is a South Korean musician, singer, songwriter, and rapper. He is best known as the bassist and vocalist of South Korean
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 0x49fb5252be61b0815f021b14a2b299770053c4aaf8a1eebe28c2792ca9cb18ba. 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/8bd93e7f-a5d0-4ef0-aa00-e49dd3ac27b7.json and https://artists.proofprofile.net/proofs/artist/8bd93e7f-a5d0-4ef0-aa00-e49dd3ac27b7.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 0x9a1735826ada09e2d10064ff03f321fb2a3800638405e25e05900fb573dd448b. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/KRA382006182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05371541ac7c28a9619e5767878edb701d093164b1d611db3f02d100f5d1c20. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/KSA012252974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545db0a7ad441d595b80307170dec04518994f0f1c46876fe8dffba69ae2077d. 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/US5TA2300110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaed4aebe5e090636ae607ee1577dd2c5b40eaa93d5b38b6219f24759fc929f2. 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/US5TA2300111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6a688be0f0adeb5ea7abad48e4cace2dd7b9160c6a8efe34680e16e92cbbdc. 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/US5TA2300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3b0c275e40c783f807d42cd00eada5ab19be426a70077e4eb3cde86d373e02. 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/US5TA2300112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da5ea95325339812fbbd8a7025e7784679c8203f4abfcb928c7b31556354126. 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/US5TA2300113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74296ca015c92d8f459c9b68f29cff8dbdfa134ce411bd3409c354e8ae4f265d. 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/US5TA2300114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9752fa01459057e8648cade5fa661bab28f2485e3f09c67f2daf257064aa21. 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/US5TA2300115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d21b25d388629979cbb72ed22f66773c26e7596333234bc31824d6e2111bc2c. 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/US5TA2300116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0582ba63084337f1f301e6455afb93d2a022cc69fae3279b3c95f339dbd4281. 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/US5TA2300117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9ccaa95714db1514cb2f5809d65942f87cabb8839f78f1b3bcdfd17593598f. 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/US5TA2300118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd6e42f3962e16e5f149a3e5fdf6f560ace895825bc4a3d2e439f54d5482bc6. 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/US5TA2300119.
With You (No Office Romance! X Young K (DAY6)) (Original Webtoon Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327c2f4128f2b0a768b201e8d602d1275147a0d0b57c3ed3e39dcecc55bb6b97. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/KSA012276231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9694a66b40e731e24edf758934b832347009e38944518a070e7e3633fcd9f18. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/KRA382321321.
GOOD BOY (Original Television Soundtrack), Pt. 2
グッドボーイ オリジナル・サウンドトラック Part.2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a5b4c80f700599f5382b0e493020553d37fb32b26344d34c9efcb37281ba18. 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/KRF702500101.
Pokémon | Go Beyond (Original Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45860ccb4b1c8da588a67ebafdcf023732a4fbfb384b55f0959ba7da072a0848. 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/QMRSZ2301240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ba030cbb1c3cb730d3374a08b58bab4016d0a2674482830f3c9ca3a073cd6c. 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/KRA382321320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9694a66b40e731e24edf758934b832347009e38944518a070e7e3633fcd9f18. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/KRA382321321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf120784a321a688571c74356bb36b0c1b775513a87235b3a89e71ba4b7f1c5ee. 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/USRC12002887.