Photos alone fade into chat history. Proof turns the condition of what you sold, rented, or handed off into a timestamped record with a shareable link.
User-created documentation with a clear timestamp. Not legal certification or cryptographic verification.
Where people use it
The first version is tuned for buyers and sellers who need a clear record without paperwork theater.
Document the exact condition of what you sold on Facebook Marketplace or Craigslist before it leaves your driveway.
How it works
No accounts required for this prototype. Fill in what matters, attach photos, and walk away with a link you can send in a text or marketplace chat.
Name the item, note its condition, and optionally log the other party, amount, and where the handoff happened.
Upload multiple shots from your phone camera or camera roll. At least one photo is required so the record has visual context.
Check the summary, confirm it looks right, and Proof saves a permanent-looking record with a unique ID and creation time.
Copy a public page the other person can open later. Same details. Same photos. Same timestamp you captured.
The record
Each Proof gets a human-readable ID, a creation timestamp from the moment you confirm, and a clean public page. It is documentation you created, presented clearly so both sides can refer back to the same facts.
Proof record
PRF-C31B-9042
Private sale
Created Sep 7, 2026
Item
Vintage trail bike · size M
Condition
Good
Amount
$180 · Paid
Notes
Light scuff on drive-side chainstay. Tires hold air. Buyer inspected in person at handoff.
This is a user-created documentation record. It is not a legal certification, court filing, or independent verification of the facts described.
Proof Snap
Capture the moment
Date and time
Captured when you create
Location text
Optional, typed by you
Photos
Camera or camera roll
Notes
Condition and context
Centerpiece
Open the create flow, add what you know, attach photos, and hit create. Proof stamps the record with the time you confirmed it and packages everything into one link. No scavenger hunt through old texts when a question comes up later.
Location is whatever you type. We do not claim GPS certainty, device forensics, or third-party authentication of the photos.
Trust and privacy
Marketplace deals already live on trust and screenshots. Proof makes the record structured and shareable, while staying transparent about its limits.
A Proof is a user-created documentation record. It helps both parties remember and share the same details. It is not a notary stamp, court order, or legal certification.
Public share links are intentional. Anyone with the link can view the record. Do not put secrets, passwords, or sensitive IDs in the notes or photos.
Once saved, records are not open to random public edits in this prototype. What you publish is what others see on the share page.
Ready when you are
Create a Proof in a few minutes. Attach photos. Share the link. Keep the same story in one place for both sides.
Prefer updates first?
Join the early-access list for product updates and notes about making private handoffs easier to document.
Your details go to the Proof team for early-access follow-up.
