NC.A
type: MusicGroup
genre: k-ballad
description: 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
popularity: 26
followers: 11041
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additional property: OTSVerifyInstructions
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  value: 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
subject of: OpenTimestamps Proof of Existence
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album: My Student Teacher
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  date published: 2013-08-12
album: My student teacher
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album: Oh My God
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album: OH MY GOD
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album: Hello Baby
  type: MusicAlbum
  date published: 2014-03-21
album: Hello baby
  type: MusicAlbum
  date published: 2014-03-21
album: Scent of NC.A
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album: Scent of NC.A
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-13T15:43:57Z
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album: Crazy you
  type: MusicAlbum
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album: Crazy You
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  date published: 2014-09-02
album: Hoo Hoo Hoo
  type: MusicAlbum
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album: Hoo Hoo Hoo
  type: MusicAlbum
  date published: 2014-12-18
album: Hoo Hoo Hoo
  type: MusicAlbum
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album: Coming soon
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album: Coming Soon
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  date published: 2015-01-05
album: Cinderella Time
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  date published: 2015-03-26
album: 통금시간
  type: MusicAlbum
  date published: 2015-03-26
album: Cinderella Time
  type: MusicAlbum
  date published: 2015-03-26
album: Girl Who Sees Smell OST Part.8
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album: Vanilla Shake
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  date published: 2015-07-20
album: Vanilla Shake
  type: MusicAlbum
  date published: 2015-07-20
album: Instinct
  type: MusicAlbum
  date published: 2015-08-24
album: Reply 1988 (Original Television Soundtrack), Pt. 11
  type: MusicAlbum
  date published: 2016-01-15
album: U in Me
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  date published: 2016-02-05
album: Mask Singer 78th (Live Version)
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album: Time to be a woman
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album: Time To Be A Woman
album: Playing with Fire
album: Love Me
album: So do you
album: So Do You
album: Risky Romance OST Part.1
album: I'm fine
album: some-
album: 퍼퓸 (Original Television Soundtrack), Pt. 3
album: Perfume (KBS 2TV Drama) OST Part.3
album: no you, no me
album: no you, no me 헤어질 자신 있니
album: Goodbye, Hello (Original Television Soundtrack) Pt. 6
album: Goodbye, Hello 안녕, 모모 (Original Soundtrack) Pt.6
album: Favorite Chart Pt.1
album: Favorite Chart Pt.1 차트의 맛 Pt.1
album: 썸툰 2021' OST - PART.2 어떻게 할까? SOMETOON 2021' OST - PART.2 Something
album: Closers : ICE CREAM (Original Game Soundtrack)
album: 널 위한 멜로디
album: leave you for a while…
album: Oh My God (2023)
album: I'm falling in love
album: What's the meaning of living alone
album: zoo in the city, zoo 35th Anniversary Pt.1
album: UNIVERSE

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date published: 2016-10-28
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  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 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
  subject of: OpenTimestamps Proof of Existence
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    description: 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.
    date published: 2026-07-05T04:47:21Z
  audio: Coming Soon
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track: Cinderella Time
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  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
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    description: 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.
    date published: 2026-07-02T16:51:38Z
  audio: Cinderella Time
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Playing with Fire
type: MusicAlbum
date published: 2016-12-26
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  additional property: OTSVerifyInstructions
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-15T19:42:24Z
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Love Me
type: MusicAlbum
date published: 2017-06-30

So do you
type: MusicAlbum
date published: 2018-02-27

So Do You
type: MusicAlbum
date published: 2018-02-27

Risky Romance OST Part.1
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date published: 2018-07-23

I'm fine
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date published: 2018-10-13

I'm fine
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date published: 2018-10-13

some-
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date published: 2019-05-10

some-
type: MusicAlbum
date published: 2019-05-10

퍼퓸 (Original Television Soundtrack), Pt. 3
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date published: 2019-06-11

Perfume (KBS 2TV Drama) OST Part.3
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date published: 2019-06-11

no you, no me
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track: no you, no me
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  additional property: OTSVerifyInstructions
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-13T15:39:45Z
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no you, no me 헤어질 자신 있니
type: MusicAlbum
date published: 2019-10-11

Goodbye, Hello (Original Television Soundtrack) Pt. 6
type: MusicAlbum
date published: 2019-11-16

Goodbye, Hello 안녕, 모모 (Original Soundtrack) Pt.6
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date published: 2019-11-16

Favorite Chart Pt.1
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date published: 2019-12-12

Favorite Chart Pt.1 차트의 맛 Pt.1
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date published: 2019-12-12

썸툰 2021' OST - PART.2 어떻게 할까? SOMETOON 2021' OST - PART.2 Something
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date published: 2021-05-24

Closers : ICE CREAM (Original Game Soundtrack)
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date published: 2021-07-15

널 위한 멜로디
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date published: 2021-09-14
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    date published: 2021-09-14
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    date published: 2026-07-19T09:26:32Z
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