Information passed to web server by your web browser

Host: show-ip.net
Accept-Encoding: x-gzip, gzip, deflate
User-Agent: CCBot/2.0
Accept-Language: en-us,en-gb,en;q=0.7,*;q=0.3
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8

Conclusions based on information above: proxy not detected
( This is very basic proxy detection based solely on browserinfo )