Verify a ledger
Someone has given you an Art50 ledger file. Drop it in below and this page will tell you whether it has been altered since it was sealed, then lay out every record in plain language.
Nothing is uploaded. Every check runs inside your own browser. We never see the file, and nothing is stored. Works offline once this page has loaded.
New to this? What you are looking at
An Art50 ledger is a running record of who reviewed a piece of AI-assisted content, when they say they reviewed it, and when that claim actually reached Art50’s servers. Each record is sealed with a fingerprint, and each fingerprint includes the one before it, so records cannot be edited, removed or reordered afterwards without it showing.
Once a day the whole thing is published to a public log that Art50 does not control, which is what fixes the dates independently of anything the company or Art50 says.
This page checks all of that arithmetic for you and tells you plainly whether it holds. It does not check whether the reviews really happened. That judgement stays yours.
Drop a ledger JSON file here
or choose one from your computer