How to download files from torrent trackers anonymously ?
Whonix will keep your IP address hidden while you use BitTorrent.
I complete agree with 0brand that whonix keeps you private while torrenting but for extra security, i am using Torrent VPN that is ExpressVPN it is awesome with the fast speed it provides 30 days money back guarantee.
But I suggestion is that before choosing any VPN first read about that VPN and choose VPN according to your requirement and budget.
Whonix will keep your IP address hidden while you use BitTorrent and other file sharing and P2P programs. However, because the Tor network suffers from limited bandwidth shared among many users, please be aware of how much you are downloading and uploading with these programs: A single 500 megabyte media file can equal hours of browsing for another user.
VPNs by design, and certainly used by themselves, are not anonymous. When used with whonix, strengthened security or anonymity is debatable.
Use Torrent VPN services when visiting these torrent websites to hide your location.
VPN is not anonymous service and can even track and log whatever you do at any time without your knowledge or permission.
Use I2P its compatible to anonymize Torrent connections.