If you wish to upload releases that were originally released before you signed up for distribution through World Star, you can set them as Back Catalogue releases.
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A back-catalogue release should have its release date set as the date the content was originally released - it cannot have a release date greater than the day it is submitted for distribution. They should also have the exact same metadata and wav files as originally distributed.

Back catalogue releases will not appear in the 'New Releases' sections of any of the stores.