Data integrity

While Blockchain-based distributed ledgers provide transaction immutability, there is also almost no way to remove inaccurate data if it was erroneously entered in the first place. For this reason, it is important to put logic into Blockchain-based applications and smart contracts which allows for new transactions to be entered that will, in effect, erase the impact of previous inaccurate entries (even though the inaccurate entries remain –just like in a paper-based ledger accounting system). In other words, this would not change the data (which would require a fork in the Blockchain as explained in section II), rather it is a “reversing entry” as would be made in an accounting ledger.