Methods and systems of creating a payment record with a cryptographically secure audit trail

A method of creating a secure audit trail for transactions may include, by a host electronic device, for each of a plurality of transactions, receiving, from a client electronic device, a transaction details document that summarizes the transaction, generating a document hash by performing a first cryptographic hash function on the received transaction details document, and identifying metadata associated with the transaction. The method may include generating an entry hash associated with the plurality of transactions by performing a second cryptographic hash function on at least the document hash of each transaction in the plurality of transactions and the metadata associated with each transaction in the plurality of transactions, and storing the entry hash in an entry in a transaction log database.