A system may be configured for integrating centralized identity management with decentralized identities and verified credentials. The techniques can bridge Web2 identity management with Web3 decentralized credentialing to facilitate secure and interoperable access to resources using Web2- and Web3-based authentication. For example, the user may use a single login to establish a session with both a Web2-based merchant and a Web3-based cryptocurrency account for making purchases from the merchant. The system may streamline registration and login using a sequence of redirects and secure data exchanges to allow users to gain access to a requested resource easily using a single scan of their digital wallet application. The system can unify the experiences for obtaining VCs and logging into a resource (whether Web2- or Web3-based) into a single flow by enabling decentralized authentication and authorization, even in cases where a user has not previously registered with the resource.