A computer-implemented method of providing data governance as data flows within and between networks, comprising: using a global computing device, retrieving data stored in a plurality of local ledgers and written by a plurality of local computing devices, wherein validity of the data stored in the plurality of local ledgers has not been verified prior to writing; using the global computing device, determining that the plurality of local ledgers is cryptographically consistent and, in response to the determination, updating a global ledger with the data stored in the plurality of local ledgers.