These are the standard IDs that identify your music. You rarely have to think about them.
ISRC (per track) An ISRC identifies one recording. There are two cases:
- Brand-new track: leave it blank. Fatstep assigns an ISRC when your release is processed. It is read-only for you.
- Previously distributed track: tick Previously distributed and enter the recording's existing ISRC (from its earlier release). This is required so streams stay attached to the same recording.
UPC (per release) A UPC identifies the whole release (the "barcode"). We assign it for you. It is shown read-only.
Back-catalogue titles For older titles already in your catalogue, some code fields are editable so we can line up historical data correctly. For new releases, treat ISRC and UPC as handled for you unless the track was distributed before.