/usr/lib/x86_64-linux-gnu/libmusicbrainz5.so.2 is in libmusicbrainz5-2 5.1.0+git20150707-6.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libmusicbrainz5.so.2.0.0
/usr/lib/x86_64-linux-gnu/libmusicbrainz5.so.2.0.0