/usr/lib/x86_64-linux-gnu/p11-kit-proxy.so is in p11-kit-modules 0.23.3-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libp11-kit.so.0.2.0
/usr/lib/x86_64-linux-gnu/libp11-kit.so.0.2.0