A system and method for establishment of a universal, secure identity for online communications, interactions, and exchanges that uniquely associates an image, sound, or other digital asset with a person's identity using non-fungible tokens (NFTs). A digital asset is stored on a blockchain as an NFT, which uniquely and immutably associates the digital asset with the account owning that digital asset, thereby establishing a unique, secure personal identifier (a “personal non-fungible token” or PNFT) of the person owning that account for online communications and interactions. Links to the PNFT (also herein called “calls to action” or CTAs) can be customized via an online platform such that interaction with a given link or type of link initiates automated actions.