Neo4j backed by a blockchain for creating #trusteddatagraphs?

Has anyone considered how to integrate Neo4j with any of the general purpose blockchain platforms to provide a trusted data, validated data, certified data capability for data stored in Neo4j? ...i.e. the ability to retrieve a entity or collection of entities and then ask: which of these have been "signed" or "validated" or "certified" using an underlying blockchain/DLT platform? ...that is, leave the data in Neo4j but use a blockchain to validate the entity stored in Neo4j hasn't been changed or altered since it was created and signed/validated/certified? ...or something like that. :slight_smile:

Best regards,
Michael Herman - Toronto-Calgary-Seattle