Im So-eun (; born October 7, 1996), better known as NC.A (), is a South Korean singer and actress. She debuted in August 2013 with the single "My Student Teacher". She was last active as a member of S
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 0x37c80ac342659e5f70a94cc50b5c8606c1f1b871341083da55a9a3eae591d549. 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/01dc0fb0-9b15-48db-ac87-e1e9e8e54245.json and https://artists.proofprofile.net/proofs/artist/01dc0fb0-9b15-48db-ac87-e1e9e8e54245.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 0xe2c1f47ac3c3e75ed31e4dcacb587c12cef3b579f9694d070946d279fb544b74. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/KRA381206746.
Reply 1988 (Original Television Soundtrack), Pt. 11
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee63a18a543979801960ceb9a0fd38ced3b83b4b55422e07ddabdf33d6960a8. 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/KRA381602125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6878497ed7be12697d9a83a4a5992fdeff7aabfb2fb433dc094097eafa9db518. 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/KRA381602126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b22e6a02314af64999d09389c9f57cac2ed93a161ac47959a4d5da34c46b2f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:42:24Z), 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/KRA381602632.
퍼퓸 (Original Television Soundtrack), Pt. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6612789316e246f151353c4ea0e72c4cbfaae003a747dab214cc2699244d9c8. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/KRF401900012.
Goodbye, Hello (Original Television Soundtrack) Pt. 6
Goodbye, Hello 안녕, 모모 (Original Soundtrack) Pt.6
썸툰 2021' OST - PART.2 어떻게 할까? SOMETOON 2021' OST - PART.2 Something
Closers : ICE CREAM (Original Game Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975cc2b97e4f86660f80aa431b4835f91dd9df4dc0799a922e86715f783277ba. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/KRB921934299.
zoo in the city, zoo 35th Anniversary Pt.1