/usr/ is in libbzrtp-dev 1.0.6-2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/
/usr/include/bzrtp/
/usr/include/bzrtp/bzrtp.h
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/libbzrtp.a
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/libbzrtp.pc
/usr/share/
/usr/share/bzrtp/
/usr/share/bzrtp/cmake/
/usr/share/bzrtp/cmake/BZRTPConfig.cmake
/usr/share/bzrtp/cmake/BZRTPConfigVersion.cmake
/usr/share/bzrtp/cmake/BZRTPTargets-none.cmake
/usr/share/bzrtp/cmake/BZRTPTargets.cmake
/usr/share/doc/
/usr/share/doc/libbzrtp-dev/
/usr/share/doc/libbzrtp-dev/TODO.Debian
/usr/share/doc/libbzrtp-dev/copyright
/usr/share/lintian/
/usr/share/lintian/overrides/
/usr/share/lintian/overrides/libbzrtp-dev
/usr/lib/x86_64-linux-gnu/libbzrtp.so
/usr/share/doc/libbzrtp-dev/changelog.Debian.gz