Abstract: Provided are devices and methods to provide access management such as for an online service or a secured location. In an embodiment, access management provides or denies access to a user in accordance with user credential information determined for the user, the user credential information indicating that the user is a provable holder of a threshold amount of a particular type of digital asset. Balance information is obtained from blockchain information, for example, by one or more methods, responsive to how a user holds/transacts their digital assets. The methods are responsive to use of different wallet types or exchange services. Credentials can be determined periodically or responsive to user activity. An example online service is a chat room for provable holders of cryptocurrency. Chat functions related to the particular type of digital asset can be permitted or denied using the access management.