Required metadata from record labels

  • Purchases from Google Play may contain a unique identifier embedded in the metadata of digital download files that is required by some record labels of all companies that sell downloads of its music.
  • Google may insert that metadata for already-made purchases, and into purchases that you make in the future.
  • The metadata typically consists of the following:
    • a random number generated by Google using an algorithm to encrypt another algorithmically generated number that identifies the transaction for the purchase of that file
    • an identification of Google as the music store distributor
    • Google's digital signature, datestamp and/or timestamp of the purchase industry codes identifying the sound recording
    • a digital indicator of whether the file has been modified