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type: MusicGroup
genre: k-ballad
description: 2NB () is a South Korean R&B duo formed by Friday Entertainment in 2006. The duo consisted of Heo Sol-ji and Kim Song-yi. They released their debut single "The First Fragrance" on March 31, 2006. The
popularity: 23
followers: 6298
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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 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
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-12T19:24:56Z
album: The First Fragrance
  type: MusicAlbum
  date published: 2006-03-31
album: I'm In a Relationship Now…
  type: MusicAlbum
  date published: 2006-09-15
album: Handwarmer
  type: MusicAlbum
  date published: 2006-12-12
album: It's scary
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  date published: 2007-01-25
album: A Tearful Eye
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  date published: 2007-02-06
album: black tears
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  date published: 2007-02-06
album: Because I Am a Girl 여자이니까 (Remake)
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  date published: 2007-06-14
album: Because I Am a Girl
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  date published: 2007-06-14
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    genre: k-ballad
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-15T14:38:07Z
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album: Hey Boy
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  date published: 2009-08-13
album: 2comfortable
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  date published: 2009-11-05
album: After Make-Up
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  date published: 2010-05-18
album: 화장을 고치고
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album: You are
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album: Do You Have a Good Boy?
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  date published: 2011-04-18
album: The Mending Of My Mind (Original Television Soundtrack) Pt.1
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album: Old Memory
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  date published: 2016-04-19
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    audio: 여자이니까 (feat. G.O)
album: FantastiC OST Part.1
album: Second Love From The End (Original Television Soundtrack), Pt. 9 - You Are The One
album: 나만 말고, 나도...
album: Superman Family 2017 OST Part.4
album: 너에게만 들려주고 싶어 (Original Motion Picture Soundtrack), Pt. 3
album: 연애수첩 Pt. 2
album: 어떤 하루
album: LALA (Live Again, Love Again) (Original Motion Picture Soundtrack), Pt. 2
album: 라라 (Live Again, Love Again) Original Soundtrack - Pt. 2
album: LALA (Live Again, Love Again) 라라 (Original Motion Picture Soundtrack), Pt. 2
album: Love Interference Season2 연애의 참견 시즌2 (Original Television Soundtrack), Pt. 1
album: Love Interference Season2 (Original Television Soundtrack), Pt. 1
album: We Broke Up 어떡하다 우리
album: I Want to Pretend I'm Okay
album: I Want to Pretend I'm Okay 잘 지내는 척하고 싶어
album: Without You 이별을 살다
album: Without You
album: How Can I Love You
album: How Can I Love You 왜 연락 안 되는 거니
album: Love Interference Season3 (Original Television Soundtrack), Pt. 2
album: Love Interference Season3 연애의 참견 시즌3 (Original Television Soundtrack), Pt. 2
album: After This Night
album: It hurts to part
album: Love Interference Season3 (Original Television Soundtrack), Pt. 28
album: I'm Fine (Bike guys [Original Television Soundtrack] Pt.2)
album: You Don't Love Me
album: Love of the sky
album: Love Interference 2021 (Original Television Soundtrack), Pt. 11
album: Why didn't I know then?
album: What are you doing now?
album: Will I Be Able To Love You Again?
album: Love Interference 2022 (Original Television Soundtrack), Pt.1
album: Far away
album: How Can I Love
album: Secret Lovers (Original Television Soundtrack), Pt.7
album: Sleepless Night (From "Beautiful Moment" [Original Soundtrack]), Pt.4
album: Someday
album: When this heartbreak will end
album: Love Interference 2023 (Original Television Soundtrack), Pt. 8
album: How To Part Ways
album: If I (You & Me & Me X 2NB)
album: My Dearest (Original Television Soundtrack), Pt.9
album: Falling in Love (From "My Blue Summer" [Original Soundtrack])
album: I loved you enough to say something I didn't mean
album: Tell me you love me
album: It was like a lie
album: Love Interference 2025 (Original Television Soundtrack), Pt.4

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OpenTimestamps Proof of Existence
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date published: 2026-07-02T16:51:38Z

여자이니까 (feat. G.O)
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Old Memory
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Old Memory
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date published: 2016-04-19

FantastiC OST Part.1
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Second Love From The End (Original Television Soundtrack), Pt. 9 - You Are The One
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date published: 2016-10-01

나만 말고, 나도...
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date published: 2017-01-09

Superman Family 2017 OST Part.4
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너에게만 들려주고 싶어 (Original Motion Picture Soundtrack), Pt. 3
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date published: 2017-05-12

연애수첩 Pt. 2
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연애수첩 Pt. 2
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date published: 2017-06-08

어떤 하루
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date published: 2017-08-25

LALA (Live Again, Love Again) (Original Motion Picture Soundtrack), Pt. 2
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라라 (Live Again, Love Again) Original Soundtrack - Pt. 2
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date published: 2018-01-08

LALA (Live Again, Love Again) 라라 (Original Motion Picture Soundtrack), Pt. 2
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date published: 2018-01-08

Love Interference Season2 연애의 참견 시즌2 (Original Television Soundtrack), Pt. 1
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date published: 2019-03-24

Love Interference Season2 (Original Television Soundtrack), Pt. 1
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date published: 2019-03-24

We Broke Up 어떡하다 우리
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date published: 2019-04-28

I Want to Pretend I'm Okay
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date published: 2019-08-11

I Want to Pretend I'm Okay 잘 지내는 척하고 싶어
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date published: 2019-08-11

Without You 이별을 살다
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date published: 2019-11-03

Without You
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date published: 2019-11-03

How Can I Love You
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date published: 2020-01-12

How Can I Love You 왜 연락 안 되는 거니
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date published: 2020-01-12

Love Interference Season3 (Original Television Soundtrack), Pt. 2
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date published: 2020-03-01

Love Interference Season3 연애의 참견 시즌3 (Original Television Soundtrack), Pt. 2
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date published: 2020-03-01

After This Night
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date published: 2020-05-10

It hurts to part
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date published: 2020-09-06

Love Interference Season3 (Original Television Soundtrack), Pt. 28
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date published: 2020-12-06

I'm Fine (Bike guys [Original Television Soundtrack] Pt.2)
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date published: 2021-01-10

You Don't Love Me
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date published: 2021-02-07
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-15T00:21:05Z
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-19T15:53:25Z
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Love Interference 2021 (Original Television Soundtrack), Pt. 11
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Why didn't I know then?
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Will I Be Able To Love You Again?
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Love Interference 2022 (Original Television Soundtrack), Pt.1
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Far away
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How Can I Love
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Secret Lovers (Original Television Soundtrack), Pt.7
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Sleepless Night (From "Beautiful Moment" [Original Soundtrack]), Pt.4
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Someday
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When this heartbreak will end
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Love Interference 2023 (Original Television Soundtrack), Pt. 8
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How To Part Ways
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date published: 2023-04-17

If I (You & Me & Me X 2NB)
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My Dearest (Original Television Soundtrack), Pt.9
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date published: 2023-10-27

Falling in Love (From "My Blue Summer" [Original Soundtrack])
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I loved you enough to say something I didn't mean
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Tell me you love me
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It was like a lie
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Love Interference 2025 (Original Television Soundtrack), Pt.4
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date published: 2025-01-25

Moving Away
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date published: 2025-03-29

an alley (2NB X Desperate Ballad Project)
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Always With Me
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date published: 2025-06-05

I Feel You X BY CHANCE PROJECT
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