Dnk,

That's very close to how it's supposed to look, however here are a couple of tips.

1. try not to get that "burnt" look on the ends, what you want is a nice round shiny ball. Some people smash the ends to make it wider but all that does is make the end weaker. For this reason I always pre-burn my loops. This way I can burn it facing straight up (like a match) and I will get a nice solid round ball. This will not pull through. If you look at your pic, there is no way that will pull through unless the burnt end fails.

2. This goes with number one. make sure you use quality loop material that melts well, even the core should melt well. Cheap string loop material will not burn good and thus you will not get a strong "ball" at the end.

3. You need to tie the loop in opposite directions, this will assure you that the balled string ends will lock into place.

4. This is personal preference but you may want to loose the brass nocks and tie on one. I only use one nowbut have used two before.

Below are some pics to show what I mean.






See how the knots are opposite each other?

you can also see where I use one tied on knock instead of a brass nock. Like I said you can tie on two and then put your string loop around the outside like your set up now.