Decentralized information management database system

A database system implemented via a server system, the server system comprising:

• a communications interface operable to receive request to present a digital content item at a client machine associated with a designated network identifier and to transmit, for each of a plurality of preference characteristics, a respective characteristic query message via a network to a respective plurality of identity nodes via a gossip communication protocol defining a peer-to-peer procedure for transmitting information among the plurality of identity nodes;
• a storage system operable to store, for each of the plurality of preference characteristics, a respective preference identification response message that includes a respective preference value corresponding with the respective preference characteristic and determined based on consensus among a subset of the plurality of identity nodes, the subset of the plurality of identity nodes being in agreement about the respective preference characteristic which indicates a respective preference associated with a user linked with the designated network identifier, wherein the designated network identifier is stored in a trust ledger shared among the plurality of identity nodes;
• and
• a processor operable to select the digital content item based at least in part on the preference values, wherein the communications interface is operable to transmit to the client machine a message including an instruction to present the digital content item.

One or more non-transitory computer readable media having instructions stored thereon for performing a method, the method comprising:

• receiving at a service system a request to present a digital content item at a client machine associated with a designated network identifier;
• for each of a plurality of preference characteristics, transmitting a respective characteristic query message via a network to a respective plurality of identity nodes via a gossip communication protocol defining a peer-to-peer procedure for transmitting information among the plurality of identity nodes;
• for each of the plurality of preference characteristics, receiving a respective preference identification response message that includes a respective preference value corresponding with the respective preference characteristic and determined based on consensus among a subset of the plurality of identity nodes, the subset of the plurality of identity nodes being in agreement about the respective preference characteristic which indicates a respective preference associated with a user linked with the designated network identifier, wherein the designated network identifier is stored in a trust ledger shared among the plurality of identity nodes;
• selecting via a processor the digital content item based at least in part on the preference values;
• and
• transmitting to the client machine a message including an instruction to present the digital content item.