DJS, medical personnel taking the blood issue to court in the case of emergency regarding a child is too much of a risk. The op's husband taking such a thing to court in the event he discovers a change in said child's medical record is a losing proposition for him.
What, if anything he considers a shot over the bow is his concern and not the op's. He needs to live by Watch Tower rules if he wants to be a jw. He is his wife's spiritual head, not the elders. He can impart their words of wisdom to her if he so desires.
In any case, the op is a grown woman living in a free country. She has the power to make decisions for herself and her daughter. Her husband is also free to get the courts involved, but to what end....to show the authorities that he wants to force his daughter to abstain from blood and attend religious meetings?
His priorities are in the wrong place if he is only worried about holding onto his position. The op's priorities are to keep her daughter and herself safe from disastrous emotional and medical decisions.