An example operation may include one or more of receiving, from a client, a pruned data structure that comprises a plurality of fields and a plurality of hash values, respectively, identifying a schema associated with the pruned data structure, determining whether the pruned data structure is a valid based on the plurality of fields in the data structure and the identified schema associated with the client, and in response to a determination that the pruned data structure is valid, committing the pruned data structure to a blockchain.