Make it mandatory for professional as well as amateur musicians to indicate covered songs as such and to reference the original author when publishing performed songs anywhere public like Youtube, Spotify, Soundcloud, etc., not to mention physical records.
Make it easy(er) for the listeners to know which songs are written by which authors. I once tried to google which (if any) songs performed by the artist Birdy were written by her because she plays a lot of covers. I didn't manage to do this even when particularly looking for that information on the internet and could only guess. This should be made easy.
Prevent cases where the majority of the public attributes certain songs to unoriginal authors due to their version being more popular and the lack of information about the origin of the song.
Make some musicians gain more popularity (especially relevant for the rising, little-known artists) by referencing their original songs and others not to take illegit credit for songs they didn't write, in other words - make the music industry more clear and fair.
Make it easier to trace back and solve copyright issues.
The referencing would be done in a simple form as is often done now, e.g.: "Monarchy - Video Games (Lana Del Ray cover)", just it would be mandatory. When publishing a song on, say, Youtube, the user first indicates the type of content they'll publish, if it's music then the system would ask if it's an original piece or a reproduced work. If it's a cover the system would open a specialized form for creating a title where you'd indicate the name of the song, your name/nickname/ band title, etc., and the name of the original author.
The same system works for remixes. When there's an original song sampling part(s) of other song(s) things get a bit more complicated, but still doable using a similar system, just the title might get bulky.
Music-matching algorithms are well-developed these days and it's easy for the algorithms to identify unoriginal work. The user who posts reproduced music without referencing the original author would be asked to change the title or delete the song.
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