Apple may be planning on integrating Internet radio stations into iTunes Radio, in addition to the service’s preloaded and custom stations.

This is suggested by an email being sent by the company to independent Internet radio providers, asking them to submit cover art for their respective stations.

Below is a copy of the email in question, obtained by MacRumors from Dutch Internet radio provider Airplay Radio:

Dear Internet Radio Provider,

Cover Art

The iTunes Store now requires cover art for Internet Radio stations. The cover art files must be 1400 x 1400 pixels in JPG or PNG format using RGB color space. The image URL must end in “.jpg”, “.jpeg” or “.png”. To add cover art to your station, send an email to itunesradio@apple.com including your contact name, station name and cover art file.

Cover art should avoid pixelation. Any text should be legible at reduced image sizes on small devices. Note that Internet Radio cover art is not currently displayed.

Questions about iTunes Radio?

Check out iTunes Radio here.

Regards,

The iTunes Internet Radio Team

As implied in the email, Internet radio cover art is going to be displayed on the Radio section of iTunes for desktop and on iTunes Radio on iPhone, iPod touch, and iPad. The former has long been operational, while the latter is set to be officially launched along with iOS 7 this fall.

Late last June, Apple also contacted independent record labels to lay out its royalty terms for iTunes Radio.