Re: trying to find if plagiarized.
See: https://musescore.org/en/node/116186#comment-523766
My comment there: "While I'm not able to do it, I think this might be a candidate for a plugin, which would take a piece submitted and compare it to uploaded scores."
Comments
I don't think comparing the scores is too difficult and there are already programs that can do this. The problem that any Plugin would face is the ability to open multiple scores - often without any clue from the title - and compare them. Now, if there were a Plugin that took a score and created some sort of "signature" or "musical fingerprint" and expressed it as a code that you could attach to the score's title or via a metatag...
In reply to I don't think comparing the by underquark
We could try and enhance the Parsons Code exporter for something along those lines. MusiPedia for example already allows this method for searching for tunes (http://www.musipedia.org/melodic_contour.html)