The sign-off record

When a client approves a version, TweakTick creates a sign-off record: proof of what was approved, by whom and when.

What it contains

• The project, the version (round) and the exact sentence the client agreed to.
• The client's name and email, and the time of approval.
• A fingerprint (a SHA-256 hash) of every file that was approved: the screenshots, the PDF and its pages, or the video.

Why you can trust it

• The client confirmed with a code sent to their email, so the approval is tied to that address.
• Records can't be changed. Each record is linked to the one before it (a hash chain). Changing or deleting an old record would break the chain, and our check (verify-chain) would show it.
• The files are fingerprinted. If anyone swapped an approved file later, its fingerprint would no longer match.

YouTube links

A YouTube video is not a file we keep, so its record works differently:

• The record fingerprints the link (the video's YouTube id), not the video itself.
• The certificate says: "This link was approved at time T. YouTube content can change without the link changing, so this record does not prove the content."
• If you need proof of the exact video, upload the video file as a Video project instead.

Where to find it

• Agencies: open the project; each approved version links to its certificate. You can print it or save it as a PDF.
• Clients: your approval email has a link to your receipt.