NCT U (; ) is the first sub-unit from the South Korean boy band NCT. They debuted on April 9, 2016, with the double digital single "The 7th Sense" and "Without You" under the label SM Entertainment.
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 0x4da2b901699c61f772d00fe2f17d88fcf39f5fc7970f4936bc76adb9e4697173. 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/dca4cdba-c099-4222-b62b-8dfa528043ca.json and https://artists.proofprofile.net/proofs/artist/dca4cdba-c099-4222-b62b-8dfa528043ca.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
When You're On The Blacklist Of Bullies Pt.1 (Original Television Soundtrack)
The Tale Of Nokdu (Original Television Soundtrack), Pt. 1
The Tale Of Nokdu 조선로코 - 녹두전 (Original Television Soundtrack), Pt. 1
coNEXTion (Age of Light) - SM STATION : NCT LAB
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 0x031414f5f80d8e3044c02e9496098928b26a4bdfc39d1116767f3fe1673a2fdb. 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/KRA302300281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1ad501b9c87fb4680d77119ebc1c796fb4b37c27aca64bccbd460c0568c78b. 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/KRA302300282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fde0b2f52e460c8e44a1e1d8748f15e24517c20bf03e1f79a357e4dc97112eb. 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/KRA302300283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa29767738f8ed3e6febadee8a221ba5a3bd3789ab4e90783822f6c99afa12d. 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/KRA302300284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e9ce0ce78355189ffd838f44426a88ac95a083e47f107c36a04958493503b7. 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/KRA302300285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2994227989ff360f72ff52f908c9c80c7d1f33221e4b5bd978cf867654d64647. 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/KRA302300286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507b7823d9cd0099848bbcad6a98de7bfe2b44a4fb5d9815df8523bab1563603. 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/KRA302300287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6803afad504a31a45b49128a9db6bbcc34652cd3f0133e143c2b2c63040af7f5. 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/KRA302300288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3686f343ac84d2446eb802d371f733f07d901833a3025ec5a363e75417b05c7b. 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/KRA302300289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb1d9863937f495838e9d505bbedc144b4959bfefb1356d120fc42b91fd4d3f. 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/KRA302100381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc9de9eb07d12e895f97a981d3c33e00b8eafb72341021270dcc9ba318101b9. 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/KRA302100380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6e8cdae7dc20cecc75a38425fd55f39527dbad5035f29f9b344ad7bb004c52. 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/KRA302100383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99d07e8066945d587dc739cb214e43b7a92ad6533a0994d3e02e6096460bbfa. 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/KRA302100384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a154a0a57ad2dc2c58880a31496d0bdf6cae482128c5f45df8c3b16bb096e8. 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/KRA302100385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138baa5f15694a149cbcb929b200b963338a41bd0d8c7257cbfec25da33fa717. 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/KRA302100387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837bd39ef91fa66a55aaba07f71a8b0ea526ed3569741d8b7ce8bbb5926e4a67. 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/KRA302100389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461e87ae0fc871f6715abcd28249d53c9c4862b9c5766574889cec56ada98d58. 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/KRA302100390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd21a25e84881efdcd4c3fd53bb32b69c108797f0830d3b2a3333ebdb51c1691. 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/KRA302100391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa4ae44b42c5c329095de496d918cebfe695764d7a9e218827ab6bcbb3dad95. 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/KRA302000567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695e9724c9baba7d7b333e69e1d3a09c98310d091ebe40764ee7c7aa77cd7b0b. 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/KRA302000568.