is the BitTorrent DHT search engine.
is a file sharing protocol.
is a protocol for
searching nodes which distribute a torrent.
is a file with metadata which describes distributed content.
BTDB's database is formed by DHT users.
BTDB participates in the DHT network and follows the DHT protocol specification.
BTDB is not a tracker
and doesn't store any content and only collects torrent metadata (such as file names and file sizes) and a
This means BTDB is the entirely legal system.