Abstract: A computer-implemented method for privacy preserving authentication augmented with physical biometric proof is disclosed. The computer-implemented method comprises providing an integrated smart entity comprising both, a visual indicator of a physical entity and a persistent memory storing picture identifier data. The visual indicator and the persistent memory are physically inseparable. The computer-implemented method further comprises comparing the visual indicator and a related feature of the physical entity to be authenticated, receiving an output value of a function having the picture identifier data as argument and a verifiable credential. Upon determining that the output value of the function and the received verifiable credential are satisfy a matching predicate, confirming the verifiable credential.