Service Cloud contact should be considered the authoritative record for consent and compliance preferences, as well as primary person attributes such as name, address, birthday, phone, and email. Service Cloud contact is the core entity that represents a person across multiple Salesforce clouds and can store and manage the customer's consent and compliance preferences using features like Individual object, Data Protection and Privacy, and Consent Management. The other systems can use Service Cloud contact as the master record and sync or update the customer data accordingly.