/usr/include/ is in libbitcoin-dev 2.0-2.2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/bitcoin/
/usr/include/bitcoin/utility/
/usr/include/bitcoin/utility/timed_section.hpp
/usr/include/bitcoin/utility/mnemonic.hpp
/usr/include/bitcoin/utility/weak_bind.hpp
/usr/include/bitcoin/utility/logger.hpp
/usr/include/bitcoin/utility/subscriber.hpp
/usr/include/bitcoin/utility/ripemd.hpp
/usr/include/bitcoin/utility/base58.hpp
/usr/include/bitcoin/utility/big_number.hpp
/usr/include/bitcoin/utility/assert.hpp
/usr/include/bitcoin/utility/serializer.hpp
/usr/include/bitcoin/utility/sha256.hpp
/usr/include/bitcoin/utility/elliptic_curve_key.hpp
/usr/include/bitcoin/utility/async_parallel.hpp
/usr/include/bitcoin/network/
/usr/include/bitcoin/network/protocol.hpp
/usr/include/bitcoin/network/hosts.hpp
/usr/include/bitcoin/network/shared_const_buffer.hpp
/usr/include/bitcoin/network/handshake.hpp
/usr/include/bitcoin/network/network.hpp
/usr/include/bitcoin/network/channel.hpp
/usr/include/bitcoin/version.hpp
/usr/include/bitcoin/poller.hpp
/usr/include/bitcoin/threadpool.hpp
/usr/include/bitcoin/transaction_pool.hpp
/usr/include/bitcoin/format.hpp
/usr/include/bitcoin/session.hpp
/usr/include/bitcoin/types.hpp
/usr/include/bitcoin/bitcoin.hpp
/usr/include/bitcoin/block.hpp
/usr/include/bitcoin/constants.hpp
/usr/include/bitcoin/transaction.hpp
/usr/include/bitcoin/address.hpp
/usr/include/bitcoin/script.hpp
/usr/include/bitcoin/primitives.hpp
/usr/include/bitcoin/validate.hpp
/usr/include/bitcoin/error.hpp
/usr/include/bitcoin/getx_responder.hpp
/usr/include/bitcoin/satoshi_serialize.hpp
/usr/include/bitcoin/transaction_indexer.hpp
/usr/include/bitcoin/impl/
/usr/include/bitcoin/impl/serialize/
/usr/include/bitcoin/impl/serialize/block.ipp
/usr/include/bitcoin/impl/serialize/misc.ipp
/usr/include/bitcoin/blockchain/
/usr/include/bitcoin/blockchain/leveldb_blockchain.hpp
/usr/include/bitcoin/blockchain/organizer.hpp
/usr/include/bitcoin/blockchain/blockchain.hpp