A system for data collection is disclosed. The system may include a data collection circuit to monitor a status of a loan and the loan's collateral, and a smart contract circuit automatically initiate at a substitution, a removal, or an addition of one or items from the collateral for the loan based on a smart lending contract in response to one of the status of the loan or the status of the collateral for the loan. The system may also include a blockchain service circuit to interpret a plurality of access control features for at least one party associated with the loan and record the substitution, removal, or addition in a distributed ledger for the loan.