how would one be mekayem ‘v’heishiv es hagezeila’?
Possibly by purchasing the song/album which was copied. Although, I don’t think one can actually be m’kayem the mitzvas aseh unless he returns the actual item.
If I stole a steak (from Seasons, for example) and then ate it (with salt and pepper, maybe), I don’t think I can actually be m’kayem the aseh, although I am obligated to pay for it.