Providing temporary use of on-line non-downloadable software and applications for keeping and managing units of account and coordinating the storage, transfer and exchange of units of account in transactions between advertisers, publishers, and users in a blockchain-based digital advertising and services platform; Providing temporary use of on-line non-downloadable software and applications used to manage, analyze and verify digital advertising campaigns and associated data transactions utilizing blockchain-based platforms; Computer services, namely, acting as an application service provider in the field of information management to host computer application software for the purpose of developing, testing, and integrating blockchain applications and software