You cannot just type these URLs into Chrome on a work network and expect success. You need a strategy.
The primary reason to use a Kickasstorrent proxy is to access the site when it's blocked by your ISP or in your country. Many countries block torrent sites due to copyright infringement concerns. Proxies can help you access Kickasstorrent and similar sites without being blocked. kickasstorrent proxies full
If katcr.to is down, try changing the TLD (Top Level Domain). Many proxies use the same database but different extensions (.to, .cr, .is, .cc). You cannot just type these URLs into Chrome