Example if you downloaded torrent and movie from ipt and then you can search the exact same name and size in torrentleech, then download the torrent only form torrleech and add in client (example qbitorrent) in paused state/or stopped state. Then match the torrleech torrent in qbittorrent, and wait for 100 percent match, then start torrent.
Summary, you need to check all seperately (download torrent file and recheck in qbittorrent)
Hope this helps!! Any question? feel free to ask here.