UPC is the catalog number for the release or « product ».
A release, like an album, can have multiple tracks. So one UPC can refer to a release with several ISRCs.
The UPC is mentioned in the release information.
The ISRC (International Standard Recording Code) is the standard identifying code attributed to each audio recording (both musical and audiovisual). Each track of your product must necessarily have an ISRC code, which will be definitively assigned to it once.
The ISRC code can be broken down in the following manner:
ISRC code : FR-6V8-12-12340
ISRC root : FR-6V8
- FR: Country code (designating the place of residence of the first owner)
- 6V8: Registrant code
- 12: Year of reference (allocated by the registrant)
- 12340 : Designation code