What do the different 'Official' World Taekwondo Federation Black Belts look like?

I just went to an open tournament a few weeks ago and I saw a few people wearing World Taekwondo Federation uniforms. (WTF Patches on V-neck uniforms with black V-trim.) One had a black belt with 5 white stripes embroidered on it. Another guy had a black belt with a red strip running through it. (Someone said he was a 5th dan black belt.) Okay, so if a red strip running the length of the belt is 5th and 5 white strips on the tip is a 5th degree, then which one is 'Official' and what other 'Official' black belt designs are there. In other styles I have seen black belts with two red stripes running the length of the belt. Black belts with a red strip with gold trim running the length; black belts with a white stripe running the length, black belts with an extra wide red stripe running the length of the belt. Since I just started Tae Kwon Do, I would love to know what the office WTF black belt description are. Links are good, but just a brief description will be fine. Thank you!