Provided are systems and methods for generating a copy of an object in an object-oriented programming architecture. In one example, the method may include one or more of receiving a command to copy a model object comprising a hierarchical object-oriented architecture that references one or more underlying data objects, freezing a state of the one or more underlying data objects to generate a frozen data store of underlying object data, generating a first proxy object that references the frozen data store and a second proxy object that references the frozen data store, modifying the model object to reference the first proxy object instead of referencing the one or more underlying data objects, and generating a copy of the model object that references the second proxy object and storing the copy of the model object.