The Toronto Star: Music Takedown Strikes The Wrong Chord

Copyright expires in Canada 50 years after the author’s death. European copyright expires 70 years after the author’s death. Accordingly, some works might be public domain in Canada that might still be protected in Europe.
The International Music Score Library Project is a not-for-profit Canadian site hosting works that are public domain in Canada.
IMSLP received this demand letter from the Austrian publisher of composers such as Bartok and Mahler (Bartok died 62 years ago, Mahler died 96 years ago (??)). The letter threatens legal action against the coordinator of IMSLP personally, in Europe, and notes that Canada could enforce such a judgement.
So IMSLP has shuttered its site for now.