US Patent 11658816 Document control system for blockchain

An example operation includes one or more of initiating a transaction of a blockchain by a contributing member of a group to assign a digital data based document to itself or to at least one other member of the group, validating a block of the blockchain associated with the transaction by the contributing member or the at least one other member that are verified, sending an ephemeral location of the document to the contributing member or the at least one other member that are verified, and modifying the document in the ephemeral location by the contributing member or the at least one other member that is verified.