Abstract: A method and system for identifying and notifying prospective users. The system may be an online multi-user platform that determines a set of users based on user data for the multi-user platform. The system may have wallet data associated with at least some of the users in the set of users. The system may then identify at least one token attribute correlated to the set of users and identify a plurality of blockchain wallet addresses associated with wallets each holding one or more tokens matching the token attribute. It may then generate and send a communication to addresses linked to the wallet addresses associated with the wallets holding the matching tokens.

Abstract: Methods and systems for blockchain token-based access control in which an access control rule sets an access condition that is satisfied if a wallet address holds one or more specified non-fungible tokens or tokens having specified attributes. To conduct in-person or on-location token-based gating, the system may employ pre-authentication of a wallet address. An identifier may be stored securely on both the system and a user device following pre-authentication. When seeking access, a user device provides identification data generated based on the identifier and the system verifies that the identification data was generated based on the identifier and, on that basis, retrieves a pre-authenticated wallet address. It then verifies using blockchain data that the wallet address holds the requisite token or tokens to satisfy the access condition.