1. A method, comprising: receiving, at a computing device, a plurality of data items about a biological entity from a plurality of sources, wherein the plurality of sources comprises a wearable device being worn by the biological entity and the plurality of data items comprises a data item that includes physiological data obtained by one or more sensors of the wearable device; verifying each data item of the plurality of data items using the computing device by at least: determining a source of the data item from among the plurality of sources, determining a provenance for the data item associated with the source of the data item, and verifying that the data item is associated with the biological entity based at least on the provenance for the data item; and after verifying that a particular data item is associated with the biological entity, storing the particular data item in a data log associated with the biological entity using the computing device.