I don't have any direct experience with PRBC, but it seems like a great idea for artists who are trying to build evidence of good credit in order to buy a house.
From their web site:
PRBC is America's Alternative Credit Bureau, providing a helpful service to the over 50 million people with limited or no credit history. If you pay your monthly bills on time, PRBC can help you build credit to qualify for a mortgage, car loan, and better interest rates.
Find out more at www.prbc.com. Their web site includes links to several articles about this new way to build credit. As always, Caveat Emptor!