Aleph Insights audited all of the potential data sources that could be used to verify identity online to help reduce the risk of child harm on behalf of a government agency. These data sources were evaluated for their reliability, practicality and other criteria in order to design an identity verification framework. We also developed an algorithmic approach for combining these data sources to maximise confidence in the verification process. This approach is now being developed as part of the UK’s effort to safeguard children online.