AT&T, the American telecom conglomerate, has filed a patent application to the US Patent & Trademark Office for a blockchain powered history map system, according to a note by the patent office. The abstract of the Blockchain-based social media history maps says that the system will store, and provide access to a mapping system that has records on transactions and movements from, and by customers. "The social media history map platforms described herein may take advantage of the immutable and permanent nature of blockchain records to store, and provide access to, data representing online transactions that occur on multiple social media applications," the application note says. "However, instead of passing ownership of blocks or data between users, a social media account owner maintains primary ownership of his or her online transaction data. What passes from the social media account owner to other users of the social media history map service, such as followers of the social media account owner, is a notion of elevated visibility rights." The idea behind the system is to identify trends or behaviours in a specific place or time, also in real time. So users can get information on what's hot or not in his transaction network. "The systems described herein may be used to quantify a type of demographic profile for a cluster of subscribers to a social media history map service, where the cluster of subscribers includes a collection of social media account owners and their followers who have established visibility relationships with each other."