What is the Catalog Number
The catalog number is a unique serial number of your release. Catalog numbers help organize and identify music label releases. In the future, you can use them, for example, to search for your releases on our service, but they are also sent to music stores..
You need to come up with a simple and understandable number yourself, which also complies with the standards for naming catalog numbers: it must be unique within the label on which the release is released, and consist of the abbreviation of this label and the serial number of this release on this label.
For example, if your label is called "Music Label Company" and you are uploading your first release, use MLC001 as the catalog number.