When you open a .torrent file or magnet link the client connects to a set of trackers (or DHT, a distributed tracker network) and receives a list of peers to co

When you open a .torrent file or magnet link the client connects to a set of trackers (or DHT, a distributed tracker network) and receives a list of peers to connect to. This site just repeats that process for a bunch of different torrents and collates the resulting data. Of course, dynamic IP addresses are a thing—and the trackers can (and do) lie about which IP addresses are part of a swarm. If you see something that you didn't actually download it could be because your IP address was shared with another customer recently or it could simply be a tracker "poisoning the well" by mixing in random IPs.