I'm working in an Android app that will need to show all the albums of the favorite artists of the user sorted by released date.
Right now the only way that I see to do this is to get the list of artist by a request, and then launch another request by artist getting all the albums. Obviously I don't think this is efficient at all, and I was guessing if there is any way of getting the full list in a single request (or a couple of them).
At same time I will like to ask if there is any way of knowing witch album is a official release and witch one not.
There are no shortcuts for that unfortunately. I think you're already making the right requests.