DataModel contains a Proof that contains all the information of its integrity along with the method with which the Proof should be verified.
In this case I designed a JWS type of proof that can be generated by using a ProofGenerator object that contains the private key to calculate the Proof. However each time a DataModel must be verified a public key must be provided by the verifier, which means that the public key (that is the information needed for the verification) is not included into the Proof.
A possible solution would be to define a new ProofMethod class that contains all the information to perform the verification and pass it to the verify method of the Proof that contains the logic to do that.
Is there a better way to design this mechanism by including all the necessary information in the Proof class to do the verification knowing that the information needed for that must be provided and not included (in this case the public key) when the Proof is created?
Another problem is that who receive the DataModel must recognize the Proof type otherwise it is not able to provide the ProofMethod necessary to do the verification.
