RICHXPROOF
Document integrity

Prove the draft was never changed.

Seal a draft contract, NDA or term sheet before the signatures. Both sides keep the transaction hash. Months later, one drop of the file shows whether a single word was changed.

Fingerprint a fileAsk Paul
PAUL · PROOF GUARDIAN · ONLINE
ASK PAULYour proof guardian · answers from the RichX Proof handbook, day and night

Paul answers inside your browser. Your question is not sent anywhere.

PROOF WATCH · 24/7A watcher on our server reads both RichX chains every minute, around the clock
…public stamps
…last scan
…blocks checked
  • Connecting to the watcher…

Every line comes straight from the chain. Nothing here is typed in by hand. Raw feed

SHA-256 fingerprint —

Stamping writes RXPROOF:v1: + the fingerprint into one transaction from your own wallet to yourself (0 RICHX + a tiny network fee). Need RICHX?

3 · Verify a stamp — paste its transaction hash

Add the original file above first to check that it matches. Works for stamps on RichX Chain and on the RichX Notary Chain.

[ready] RichX Proof engine online — SHA-256 in your browser, live RichX Chain lookups.

…RichX Chain · live block
…Notary chain · live block
SHA-256fingerprint standard
0 uploadsyour file stays with you

What people stamp here

01

The final draft both parties agreed, before signing

02

NDAs and term sheets as sent

03

Offers and quotes with their date

04

Minutes and resolutions as approved

How it works

01

Fingerprint

Your browser calculates the SHA-256 fingerprint of the file. The file itself never leaves your device.

02

Stamp

Your own wallet writes the fingerprint into one RichX Chain transaction. The block time becomes the proof.

03

Verify

Anyone with the file and the transaction hash can check it — here, on the explorer, or with their own tools.

What a stamp is — and is not. A RichX Chain timestamp proves that a file with exactly this SHA-256 fingerprint existed no later than the time of the block. It does not prove who created the file, and it is not a notarial certification or legal advice. Whether it is accepted as evidence is decided by the court or authority in each case.

Questions & answers

Can both parties check it?

Yes. Anyone with the file and the transaction hash can verify it here or on any RichX Chain explorer — no account and no permission needed.

What exactly does a stamp prove?

That a file with exactly this SHA-256 fingerprint existed no later than the time of the block it was written into. Change a single byte of the file and the fingerprint no longer matches.

Do you see or store my file?

No. The fingerprint is calculated inside your own browser. Your file never leaves your device — only the 64-character fingerprint is written to the chain, and nobody can turn it back into your file.

Is this a notarial deed?

No. It is a cryptographic proof of existence, not a notarial certification and not legal advice. It does not prove who created a file. Whether a court or authority accepts it as evidence is decided case by case.

What does it cost?

RichX Proof charges nothing. You only pay the RichX Chain network fee — a tiny amount of RICHX — from your own wallet. You can get RICHX on RichXchange.

What if richx.pro disappears one day?

Your stamp stays on RichX Chain. The fingerprint is standard SHA-256, so anyone can recalculate it with ordinary tools and compare it with the transaction on any RichX Chain node or explorer.

What do I need to keep?

The original file, unchanged, and the transaction hash of your stamp. With those two, anyone can check the proof at any time.