That can't be reliably answered at that level with significant effort. Content isn't made available "by aritst." So, some tracks/albums may be available via subscription... some not. It's all up to the label/owner. Most later Peppers albums are not, for example. Sorry, but I'm not documenting every single album and track for all those artists. =)
It's millions of songs. Just try it for 30 days. $15. And don't limit yourself to artists you already know. Cancel if you don't like it. New content appears all the time. It's a great service for music lovers.
