Identifying music restricted by copyright.
Recently I uploaded an arrangement of McCartney's Yesterday. MuseScore blocked it for copyright reasons. Does anyone know how I can tell that a score will be blocked before I put in the effort to write an arrangement for sharing?
Consider asking your question over on that score sharing platform. See https://musescore.org/en/faq#faq-20657 for why this isn't the best place to ask it.
But the quick summary answer is; there is no public list to consult concerning works licensed to musescore.com. Try asking the copyright holder for permission if you wish to arrange their work.