The Capability "Proof of Value demonstration" likely belongs to the Value Theme of "Demonstrating Value". Demonstrating Value is a Value Theme that emphasizes the importance of showcasing the value of a product, service, or capability to customers or stakeholders. The Proof of Value demonstration is a means of demonstrating the value of a capability by providing evidence that it can deliver the expected benefits or outcomes. Therefore, it is aligned with the Demonstrating Value Value Theme.