Here is the problem:
Eligibility
This warranty applies to the original purchaser of a replacement Cooper passenger or light truck tire and is not transferable. Eligible tires must be purchased new and used on the vehicle which they were originally installed. Proof of purchase is required for all warranty claims.
Since the dealership purchased the tires and not me I cannot file a warranty claim as far as I know.
Make it the dealers problem. Start by speaking to them, see where it goes from there.