You don't say how long ago the probate work was done, and that could be very important. Involuntary liens on property are allowed by statute for certain purposes, such as for services provided (called a mechanic's lien). You may have a cause of action against your brother for breach of fidiciary duty, and you may be able to prevent the sale of the house until your claims are resolved by recording a "lis pendens," which is public notice of a claim that involves the house. If the facts are as you perceive them, your remedy is most likely within the probate action. Be aware that there are time limits for pursuing claims like this. Nothing short of representation by experienced probate counsel who regularly practices in the court overseeing the probate will meet your needs.
Best wishes for a favorable outcome, and please remember to designate a best answer.
This answer is offered as a public service for general information only and may not be relied upon as legal advice.