What is a UPC?
UPC stands for 'Universal Product Code'.
UPC is the barcode for trade items, digitalized music being such an item.
A UPC represents your release, a track or collection of tracks known as an album.
What is an ISRC code?
ISRC stands for International Standard Recording Code, it's the international identification system for sound recordings and music video recordings. Each code is permanent and distinctive. This means that your track will have the same ISRC code everywhere, regardless of platform or streaming service. The code helps to verify a few things such as: Track title, Artist Name, Album Title, Label Name and UPC.
An ISRC is essentially a music tracking code that verifies associated recording information.
You can apply for UPC and ISRC codes yourself or Revelator can supply you with one when you create your release.