Ensuring data integrity of executed transactions

A non-transitory computer-readable medium storing instructions that, when executed by a processor, cause the processor to:

• store, by a central service provider, a blockchain comprising a set of blocks, wherein each block of the set of blocks stores one or more transaction records for one or more transactions performed by one or more users of the central service provider;
• receive transaction data describing a target transaction;
• identify a block of the set of blocks of the blockchain that stores one or more transaction records comprising a transaction record for the target transaction;
• compare the received transaction data for the target transaction to the transaction record for the target transaction stored by the identified block in the blockchain;
• identify, based on the comparison, a discrepancy between the received transaction data describing the target transaction and the transaction record for the target transaction stored by the identified block;
• and
• send a notification of the discrepancy to a system that is adapted to reconcile the discrepancy.