Piano
type: MusicGroup
description: A piano is a keyboard instrument that produces sound when its keys are depressed, activating an action mechanism where hammers strike strings. Modern pianos have a row of 88 black and white keys—with
popularity: 14
followers: 91
additional property: CopyrightID
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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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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fb8a125fa4f984c83bc1f207e404d1bea96bd46191ae3d2c8eb48ffc04090b. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75b93019-9cf2-4819-86f5-6f38a5a48335.json and https://artists.proofprofile.net/proofs/artist/75b93019-9cf2-4819-86f5-6f38a5a48335.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T04:47:56Z
album: 오렌지 향기속으로
  type: MusicAlbum
  date published: 1994-10-01
album: 오렌지 향기속으로
  type: MusicAlbum
  date published: 1994-10-01
album: 나만의 너를 위해
  type: MusicAlbum
  date published: 1995-07-01
album: 나만의 너를 위해
  type: MusicAlbum
  date published: 1995-07-01
album: Aurora
  type: MusicAlbum
  date published: 2012-04-27
album: 1st
  type: MusicAlbum
  date published: 2014-03-01
album: 2nd
  type: MusicAlbum
  date published: 2014-03-01
album: Healing Taegyo Music Part.1 - The Gift Of Love
  type: MusicAlbum
  date published: 2015-09-17
album: 클래식 태교 동요 Piano 10곡
  type: MusicAlbum
  date published: 2018-04-18
album: 우리아기의 행복한 웃음이 피어나는 태교 음악 20
  type: MusicAlbum
  date published: 2018-09-06
  track: 캐논변주곡
    type: MusicRecording
    duration: PT5M49S
    duration ms: 349910
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    by artist: Piano
    in album: 우리아기의 행복한 웃음이 피어나는 태교 음악 20
      type: MusicAlbum
      date published: 2018-09-06
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    additional property: OTSTimestamp
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    additional property: OTSVerifyInstructions
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      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 0x5505ce55b15f9064347b885ac0a56f0fef2ee3e427759414256cf12523e50ca3. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/KRZ291904090.
      date published: 2026-07-14T21:26:15Z
    audio: 캐논변주곡
      type: AudioObject
      additional property: Tempo (BPM)
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      additional property: Musical Key
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        value: 3
      additional property: Mode (Major/Minor)
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      additional property: Time Signature
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        value: 4
      additional property: Danceability
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      additional property: Energy
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      additional property: Speechiness
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      additional property: Acousticness
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      additional property: Instrumentalness
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      additional property: Liveness
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      additional property: Valence (Positivity)
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      additional property: Loudness (dB)
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        value: -23.196
      additional property: Key Name
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        value: Eb
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: 피아노 Piano 태교 음악 베스트 20
  type: MusicAlbum
  date published: 2018-09-20
album: 어린이집 유치원 태교 어린이 피아노 20곡
  type: MusicAlbum
  date published: 2018-11-22
album: 태교 어린이 피아노 연주곡 20곡(자장가,유아동요,크리스마스캐롤)
  type: MusicAlbum
  date published: 2018-12-04
album: 겨울에 어울리는 어린이 태교 피아노(새소리)
  type: MusicAlbum
  date published: 2019-01-17