Prove your document existed without exposing its contents.
TxProof creates a SHA-256 proof of your document, a public verification page, a PDF certificate, and optional blockchain confirmation. The original document is not stored - only its digital fingerprint is kept.
A simple process, a clear proof.
TxProof does not replace a lawyer, notary, or court. Its role is technical: to show that a specific document hash existed at the time of registration.
Choose a document
The document is used to calculate a SHA-256 hash. The original file is not retained.
Get the hash
The hash is the document digital fingerprint. Even the smallest file change creates a different hash.
Register the proof
The proof can be a local record or a blockchain record.
Download the certificate
The PDF certificate includes the hash, status, verification link, and blockchain confirmation details when available.
What we store, and what we do not store.
This must be clear before registration and before any blockchain confirmation.
TxProof does not store your original document. The system stores only the SHA-256 hash and basic metadata required to verify the certificate.
The certificate confirms hash integrity and registration status. It does not confirm the truth, legality, or legal force of the document content.
SHA-256 proof
A hash is a unique digital fingerprint of the file. If the document changes, verification will no longer produce the same hash.
Public verification link
Each certificate can have a public verification page without revealing the original document.
Blockchain confirmation
Polygon Mainnet proof records the document hash after payment and transaction confirmation.
Start free. Mainnet proof starts at 1 USD.
TxProof creates paid blockchain proofs on Polygon Mainnet after credit purchase and transaction confirmation.
- PayPal checkout before the mainnet blockchain transaction
- PDF certificate after confirmation
- Certificate notification by email
- Polygon Mainnet proof is available after credit purchase
Payment provider: PayPal Checkout
Mainnet proof credits are purchased through PayPal. Create an account or log in first so the payment can be connected to your TxProof credits and certificate.
Key questions before using TxProof.
Does TxProof store my document?
No. The original document is not stored. It is used to calculate the hash, and then only the hash and registration metadata are kept.
What does the PDF certificate prove?
It proves that a specific SHA-256 hash was registered in the system and, if a blockchain record exists, confirmed on the network. It does not confirm the legal truth of the document content.
Is this a production blockchain proof?
Polygon Mainnet proof means a SHA-256 document hash is recorded on Polygon Mainnet while the original file stays private.
Can someone reconstruct the document from the hash?
Under normal conditions, no. A SHA-256 hash is a one-way digital fingerprint. Still, users should avoid publishing sensitive documents without understanding the risks and context.
Protect your work with verifiable proof of existence.
TxProof helps authors, photographers, designers, freelancers, students, researchers, and teams create timestamped evidence for documents, images, designs, academic work, and creative files.
Create proofNeed help with TxProof?
For account, certificate, billing, or security questions, use the right TxProof contact mailbox.
Support
Account help, public verification, certificates, and document proof questions.
Billing
PayPal checkout, credit packages, payment status, refunds, and invoice questions.
Security
Responsible security reports, suspicious activity, and account protection concerns.
Automated system emails may be sent from noreply@txproof.com, but that mailbox is not used for support.