New York Polyphony
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genre: choral
genre: gregorian chant
description: New York Polyphony is a male classical vocal quartet based in New York City specializing in Early Music. The group's stated mission is to revive rarely heard masterpieces of antiquity. The quartet ha
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album: Tudor City
  type: MusicAlbum
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album: Surrexit Christus - EP
  type: MusicAlbum
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album: endBeginning
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album: endBeginning
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album: Devices & Desires [Expanded Edition]
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album: Times Go by Turns
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album: Times Go by Turns
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album: Times Go by Turns
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album: Sing Thee Nowell
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album: Sing Thee Nowell
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album: Sing Thee Nowell
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album: Roma æterna
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album: Roma æterna
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album: Gregory W. Brown: Missa Charles Darwin (Commentary Edition)
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album: Gregory W. Brown: Missa Charles Darwin (Commentary Edition)
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album: Lamentationes
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  track: Sancta Maria succure miseris
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album: And the Sun Darkened: Music for Passiontide
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OpenTimestamps Proof of Existence
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date published: 2026-07-30T02:37:10Z

Sancta Maria succure miseris
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Lamentationes
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And the Sun Darkened: Music for Passiontide
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-31T21:25:57Z
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track: Taaveti laul 22
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-08-01T00:40:43Z
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date published: 2026-07-31T18:48:12Z

O salutaris hostia
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Sky of my Heart
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  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 959123
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/959123
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAED2419020
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-22T11:35:32Z
  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 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
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3be5f34c177d777168ccdba8bbe1005c3b4a976ed303c403489a7b9fa36f35. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAED2419020 — a six-check JSON result.
    date published: 2026-07-22T11:35:32Z
  audio: I. Surge propera amica mea
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 76.792
    additional property: Musical Key
      type: PropertyValue
      value: 3
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.092
    additional property: Energy
      type: PropertyValue
      value: 0.017
    additional property: Speechiness
      type: PropertyValue
      value: 0.046
    additional property: Acousticness
      type: PropertyValue
      value: 0.97
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.192
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.037
    additional property: Loudness (dB)
      type: PropertyValue
      value: -30.001
    additional property: Key Name
      type: PropertyValue
      value: Eb
    additional property: Mode Name
      type: PropertyValue
      value: Major