Choir Practice
type: MusicGroup
description: Choir Practice is a retrospective album by the Choir that has been released in both LP and CD format. Release data This album was released in 1994 by Sundazed Music as an LP (#LP-5009) and as a CD (#
popularity: 4
followers: 136
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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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  date published: 2026-06-17T08:10:43Z
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album: The Choir Practice
  type: MusicAlbum
  date published: 2007-01-01
album: The Choir Practice
  type: MusicAlbum
  date published: 2007-01-01
album: The Choir Practice
  type: MusicAlbum
  date published: 2007-01-01
  track: Failsafe
    type: MusicRecording
    duration: PT1M54S
    duration ms: 114680
    explicit: false
    by artist: Choir Practice
    in album: The Choir Practice
      type: MusicAlbum
      date published: 2007-01-01
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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 0x4ee628e10a9d099b2fc2f6d4bfc18aa05503734511096c7e58b9fa6ed0f5e5df. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CAMA10710407.
      date published: 2026-07-16T12:43:37Z
    audio: Failsafe
      type: AudioObject
      additional property: Tempo (BPM)
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        value: 74.825
      additional property: Musical Key
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        value: 9
      additional property: Mode (Major/Minor)
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      additional property: Danceability
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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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      additional property: Key Name
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      additional property: Mode Name
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