/usr/ is in libblosc-dev 1.14.2+ds1-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/
/usr/include/blosc-export.h
/usr/include/blosc.h
/usr/lib/
/usr/lib/libblosc.a
/usr/share/
/usr/share/doc/
/usr/share/doc/libblosc-dev/
/usr/share/doc/libblosc-dev/README_HEADER
/usr/share/doc/libblosc-dev/README_THREADED
/usr/share/doc/libblosc-dev/copyright
/usr/share/doc/libblosc-dev/examples/
/usr/share/doc/libblosc-dev/examples/README.rst
/usr/share/doc/libblosc-dev/examples/many_compressors.c
/usr/share/doc/libblosc-dev/examples/multithread.c
/usr/share/doc/libblosc-dev/examples/noinit.c
/usr/share/doc/libblosc-dev/examples/simple.c
/usr/share/doc/libblosc-dev/examples/win-dynamic-linking.c
/usr/lib/libblosc.so
/usr/share/doc/libblosc-dev/README.gz
/usr/share/doc/libblosc-dev/THANKS
/usr/share/doc/libblosc-dev/changelog.Debian.gz