You are required to advise the court of your presence, when they call your name. As a former copper I can tell you, the crown doesn't "dismiss" witnesses, Police or civilian, until there is a resolution of the case, (it is either put over for another hearing, which won't be the scenario in your case as you will be slated for trial), or the case is resolved, via a plea or a finding of guilt by the court
Now failing to advise the court of your presence, (remember there are OFTEN distraction in court), the crown calls your name, advises the court, that your case is slated for trial, but it appears you failed to attend. The JP then registered a ruling of GIA, (Guilty In Absentia). They move on. The entire scenario above can be finished in about 2 minutes.
In the eyes of the court you ARE an adult, and as such expected to act as one, it is NOT up to them to go "hunting" for you.
The other, scenario, of playing "hide and seek" with the court is you tick off the JP who, perhaps despite evidence simply renders a guilty verdict. Sure, you can appeal if that were to happen, BUT that will, (if you plan to be successful), several trips to the courthouse, as well as hiring a COMPETENT lawyer, (I personally wouldn't entrust an appeal to a paralegal, no matter smooth a talker they are).
IF you, (which one would assume by your desire to go to trial), have actual FACTS and evidence that would support a not guilty verdict, then forget about playing "childish games", check in, when the crown asks to speak to you, make it clear you intend to go to have the matter resoklved via a trial. Sit down and wait your turn. WATCH the proceedings carefully, to see if there are any things that seem to hang others, and what if anything seems to work he defendants favour.
Good luck