You can only guarantee the records have not been tampered with if you maintain a full copy of the records to compare. Even if you do have that full copy you will have a problem proving your copy is the correct one. A full crypto-verified ledger solves that.
If you empower e.g. every change filer (court, notary public) to run a node fudging records becomes effectively impossible.
Given the quality of the simulation I think it’s a vibe-coded prototype