You can go to http://www.worldoflogs.com
and create an account there for your guild (or your guild master can do it).
When you go to some raid, type
to start logging that raid. When raid finishes, type the same command again to end logging. After that, go to worldoflogs.com and upload your latest raid.
The whole process might sound complicated at start, but it really takes only few minutes.
More info here : http://worldoflogs.com/help/index/
Once logs are uploaded to World of Logs it will automatically appear on wow-heroes character page.