The therapists should be keeping a log to document services. Districts get in big trouble when they don't have the documentation, don't provide the services as scheduled, etc.
Blackcat, we had a similar situation with our ds and received some excellent advice from our local pro-bono law group which provides services at no charge for people with disabilities. The agency was able to suggest very specific language to use in the IEP re documenting and reporting. I am not sure if you have an agency that does this type of work in your area, but if you can find one I suspect they would be willing to help out here -
Best wishes,
polarbear