Hong Chang Woo
type: MusicGroup
genre: k-ballad
popularity: 3
followers: 284
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953970
additional property: OTSProofURL
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  value: https://artists.proofprofile.net/proofs/artist/29f87b22-5892-400c-bee6-4b88a830735b.ots
additional property: OTSRecordURL
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  value: https://artists.proofprofile.net/proofs/artist/29f87b22-5892-400c-bee6-4b88a830735b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/29f87b22-5892-400c-bee6-4b88a830735b
additional property: OTSTimestamp
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  value: 2026-06-16T16:09:39Z
additional property: OTSCanonicalRecord
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additional property: OTSVerifyInstructions
  type: PropertyValue
  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
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f15965dbd8412799e0b897adb750036cd8322e82ef467f78a32ff9e6849d47b. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29f87b22-5892-400c-bee6-4b88a830735b.json and https://artists.proofprofile.net/proofs/artist/29f87b22-5892-400c-bee6-4b88a830735b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T20:07:57Z
  text: {"copyright_id":"0x3f15965dbd8412799e0b897adb750036cd8322e82ef467f78a32ff9e6849d47b","name":"Hong Chang Woo","registered_at":"2026-06-16T04:14:28Z","symbol":"NIM0934147","token_address":"0xa9a188c1f026b6fbe0d45002e522c10fd36cdd98","type":"artist","uuid":"29f87b22-5892-400c-bee6-4b88a830735b"}
album: The First Chapter
  type: MusicAlbum
  date published: 2014-01-17
album: 그런사이
  type: MusicAlbum
  date published: 2014-05-19
album: Sweet
  type: MusicAlbum
  date published: 2014-10-24
album: 시간이 지나도
  type: MusicAlbum
  date published: 2014-10-31
album: Spotlight
  type: MusicAlbum
  date published: 2015-01-21
album: 861013
  type: MusicAlbum
  date published: 2015-03-16
album: 못해
  type: MusicAlbum
  date published: 2015-07-31
album: CLOSER
  type: MusicAlbum
  date published: 2015-08-28
album: Dreaming
  type: MusicAlbum
  date published: 2015-11-12
album: START
  type: MusicAlbum
  date published: 2015-12-11
album: Dark Horse
  type: MusicAlbum
  date published: 2016-03-14
album: My Way
  type: MusicAlbum
  date published: 2016-05-20
album: 夢
  type: MusicAlbum
  date published: 2016-07-22
album: farewell
  type: MusicAlbum
  date published: 2016-11-17
album: Short Story
  type: MusicAlbum
  date published: 2016-11-29
album: Hurricane
  type: MusicAlbum
  date published: 2017-02-28
album: Take my hand
  type: MusicAlbum
  date published: 2017-07-18
album: EGOTISM
  type: MusicAlbum
  date published: 2018-01-11
album: THE SENTIMENTAL CHAIN
  type: MusicAlbum
  date published: 2018-06-19
album: OBSERVATION
  type: MusicAlbum
  date published: 2018-12-12
album: My Angel
  type: MusicAlbum
  date published: 2020-01-31
album: HongChangWoo Project First Story
  type: MusicAlbum
  date published: 2020-04-15
  track: First love(Feat. JUN, DONGHUN, CHAN of A.C.E)
    type: MusicRecording
    duration: PT4M11S
    duration ms: 251533
    explicit: false
    by artist: Hong Chang Woo
    in album: HongChangWoo Project First Story
      type: MusicAlbum
      date published: 2020-04-15
    genre: k-ballad
    isrc code: KRA382001157
    additional property: CopyrightID
    additional property: CopyrightStatus
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    additional property: OTSBitcoinBlockVerifyURL
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    additional property: OTSVerificationAPI
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      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA382001157
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T01:12:41Z
    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
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8238553bdad22577262cda7f1c7c31156c7bd9682890afcd58750e9ce3c3c71. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/KRA382001157.
      date published: 2026-07-05T01:12:41Z
    audio: First love(Feat. JUN, DONGHUN, CHAN of A.C.E)
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 133.52
      additional property: Musical Key
        type: PropertyValue
        value: 11
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.454
      additional property: Energy
        type: PropertyValue
        value: 0.519
      additional property: Speechiness
        type: PropertyValue
        value: 0.029
      additional property: Acousticness
        type: PropertyValue
        value: 0.603
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.128
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.307
      additional property: Loudness (dB)
        type: PropertyValue
        value: -4.983
      additional property: Key Name
        type: PropertyValue
        value: B
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Hong Chang Woo Project Second Story
  type: MusicAlbum
  date published: 2020-05-02
album: HongChangWoo Project Third Story
  type: MusicAlbum
  date published: 2020-05-31
album: HongChangWoo Project Fourth Story
  type: MusicAlbum
  date published: 2020-06-20
album: Hong Chang Woo Project Fifth Story
album: Hong Chang Woo Project Sixth Story
album: Hong Chang Woo Project Seventh Story
album: The day we Say goodbye
album: The Night is Pretty Long
album: 돌아가
album: What I had to say then
album: About Hello

Hong Chang Woo Project Fifth Story
type: MusicAlbum
date published: 2020-09-20

Hong Chang Woo Project Sixth Story
type: MusicAlbum
date published: 2020-12-13

Hong Chang Woo Project Seventh Story
type: MusicAlbum
date published: 2021-03-12

The day we Say goodbye
type: MusicAlbum
date published: 2022-03-25

The Night is Pretty Long
type: MusicAlbum
date published: 2022-08-05

돌아가
type: MusicAlbum
date published: 2023-10-03

What I had to say then
type: MusicAlbum
date published: 2023-11-29

About Hello
type: MusicAlbum
date published: 2024-05-28