Abstract: A computer-implemented method includes receiving, as training data, streaming session data for a user profile in a streaming service, designating continue-watching behavior across a session pair of the user profile as a positive proxy signal, indicating that the same user is watching in both sessions of the session pair, designating concurrent viewing behavior between two or more sessions of the user profile as a negative proxy signal, indicating that different users are watching in the two or more sessions, using the positive and negative proxies to train a model to distinguish between streaming sessions belonging to the same user or between different users of the user profile, and deploying the trained model to infer virtual user identifications within the streaming service. Various other methods, systems, and computer-readable media are also disclosed.