Welcome Bugsy Malone!!! Tallullu has given you some great advice. Some of what I'll be advising will be confirming what has already been said.
First - your bunny is reaching sexual maturity and this is the time when the hormones drive territorial behavior - which can include marking. If spreading your bunnies scent doesn't help, then you will have to claim the bed as ONLY yours. The only way you can do this is to not allow your bunny on the bed when you are there and block your bunny from the bed when you are not there. Once he gets it, he can then be allowed on your bed. But I wouldn't allow him on there for at LEAST two weeks.
Note: Neutering your bunny will help tremendously with this problem, though you still need to train even an altered bunny.
Second - I am always recommending x-pens because they allow enough freedom during confinement. Maybe you can look into that.
Third - Anytime you change things around, whether it be moving or just moving your furniture, you still need your bunny to understand what is "his" place versus a more neutral place that he is not allowed to mark in. One way to do this is to make the x-pen or whatever is "his" place be just his. This means you don't reach in to move things around while he's in there. So for example, change his water, his litterbox, etc, while he is out running around. Don't reach in to pet him while he's in there either. Again you won't always have to do this, but during training or retraining.
Also, it's a good idea to let him get into and out of his space/pen on his own. Meaning don't pick him up to place him there. It's best to gently herd him to his space and then offer a treat once he's there, and then quickly give him peace. So he understand it's a safe place that is just his. Once he can find security in a place he is less likely to mark other places.
But there will be places, like your bed, or couch, that hold our scent, that he may still try to claim. In that case, you wtill have to use 1st and 2nd tips.
Keep us updated on how you decide to solve this problem and of course we are here to help you through it.