If we use the private torrent site scene as a model all of those things are pretty much solved.

These regulatory agencies go around and play whack a mole on them but they tend to live for a long time and have vast archives when they become mature.

see the history of the late what.cd for a rundown of what once existed for music. I think that cheap streaming services have kind of killed the peak potential of the music version of these sites though. It's kind of sad though because what.cd had every single release of every single song catalogued. Streaming sites will only give you 1 or a few.