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 /combatlog 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.
Everything works properly on your character page as you can see on the screenshot . If this field is closed for you ,at the end of the World of Logs line on your character page you can click on the - sign.
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