Ownership is the core reason brands explore AI models. Instead of paying repeatedly for third-party creator access, the brand can develop an identity asset that compounds over time. That only works when rights are clear from the beginning. A strong AI model engagement defines who owns the persona concept, visual system, prompts, edited outputs, account handles, audience data, and derivative campaign materials. It also defines what is not allowed: undisclosed impersonation, confusing human likeness claims, or unsafe use cases that create brand risk.