The Shoutcast Widgets Artist Library is free for all to use.
Format and artist name required at end or Url ... ie https://images.datadoesit.com/ARTIST/BIG/MADONNA
You can change the image size to either BIG or SMALL
To enable cache add url paramater ?cache=yes
Each artist can have up to 3 different photos which will display randomly.
You can view which images are available in the browser console. Make sure you include the paramater debug=yes in the Url, right click in the browser window and choose Inspect > Console Tab
Make sure you use rawurlencode() when passing the artist name in your calls.
Shoutcast Widgets cutomers can upload their own custom artist images.