Oh, that's weird. I've never heard of anything like that in the US.
In theory, a pretty simple scheme of publicly posted cryptographic hashes would prove to anyone you send the data to (presumably tax authorities? Auditors?) that you haven't altered data. Maybe periodically post a running hash of the list of transactions. Even if that works in theory, I'm guessing it's hell to get it actually certified.
In theory, a pretty simple scheme of publicly posted cryptographic hashes would prove to anyone you send the data to (presumably tax authorities? Auditors?) that you haven't altered data. Maybe periodically post a running hash of the list of transactions. Even if that works in theory, I'm guessing it's hell to get it actually certified.