We've had similar requests in the past, but no really workable solution was found. One of the possible solutions we currently consider for the future is to open additional information in a separate window where it searches artist name in internet.
If you need it now, you can use nowplaying notifications to send requests to your web site, it then can find artist info and display it on a web page (automatically updated). You open this page in the web browser and always see the current artist info. The main problem here is all that needs to be programmed