Everything you wanted to know.

What is TruthStamp?

TruthStamp is a service that creates verifiable, tamper-proof timestamps for your digital content. When you "stamp" something — a piece of writing, a file, a prediction — we generate a cryptographic fingerprint of it and seal it with a permanent timestamp. Later, you can prove that exact content existed at that exact time, and nobody can dispute it.

Do I need any technical knowledge to use it?

No. If you can copy-paste text or upload a file, you can use TruthStamp. Sign up with your email or Google account, type or paste your content, click "Stamp it," and you're done. The technical machinery happens invisibly in the background.

Is there a free tier?

Yes. When you sign up, you get 10 free credits to try the product — that's enough for 10 text stamps. No credit card required. After your free credits run out, you can buy a credit pack starting at $10. Credits never expire.

How long does it take to create my first receipt?

About 60 seconds total: 30 seconds to sign up, then a click to stamp. The stamp itself completes in roughly one second. Your shareable proof URL is generated immediately.

What's actually being timestamped?

A cryptographic fingerprint (called a "hash") of your content. Your content is run through a one-way function that produces a unique 64-character string. Change one comma in your content and the fingerprint changes completely. We store this fingerprint plus the exact timestamp, plus your verified identity. Later, anyone can re-fingerprint the original content and confirm it matches — proving the content existed at that exact moment.

What's the difference between Public, Sealed, and Hash-only?

Public: Anyone with the link can see the content. Use this for receipts you want to share publicly — proving you wrote a blog post, claiming a prediction, showing client work.

Sealed: The content is hidden until a date you choose. On that date, it auto-reveals to the public. Perfect for predictions ("I think X will happen by June") where you want the world to verify the timestamp later.

Hash-only: Only the cryptographic fingerprint is stored. The content stays on your device. Years later, you produce the original file and prove the timestamp matches. Use this for trade secrets, pre-patent disclosures, and anything you want to keep entirely private.

What is a "Sealed" prediction, exactly?

A sealed stamp lets you make a public prediction whose contents stay hidden until a specific date you set. Until that date, the world can see "Priya stamped something on April 15, 2026, scheduled to reveal June 1, 2026" — but they can't see what. On June 1, the content auto-reveals. This proves you wrote it before any of the events you predicted happened. Impossible to fake; impossible to backdate.

Can I edit a stamp after creating it?

No. The whole point of TruthStamp is that the proof is permanent and tamper-proof. Once a stamp is created, it cannot be modified or deleted. If you need to update something, create a new stamp — the original stays on record showing what was true at that moment.

Can TruthStamp see my content?

It depends on the visibility you choose:

Hash-only: No. Your content is fingerprinted in your browser before anything is sent. We only ever receive the fingerprint, not the content itself.

Sealed: Temporarily, in encrypted form, until reveal date. After reveal, it becomes publicly accessible.

Public: Yes — that's the whole point. Public stamps are stored on a permanent decentralized layer so anyone with the link can read them.

Where is my content stored?

For Public stamps, the content is stored on Arweave — a decentralized permanent storage network with a 200+ year persistence guarantee. For Hash-only stamps, nothing is stored anywhere except the fingerprint. For Sealed stamps, the encrypted content is held by us until reveal, then moved to Arweave.

Is my account information private?

Yes. Your email, payment details, and account preferences are only visible to you. We never sell your data, and we don't display your email publicly. You'll appear on stamps under your chosen display name. Read our full Privacy Policy →

What if I lose access to my account?

If you forget your password, use the "Forgot?" link to reset via email. If you lose access to your email entirely, contact us at support@truthstamp.io with proof of identity — we can recover accounts in most cases. Your stamps themselves are not at risk; they exist on the verification layer regardless of your account state.

Can I buy multiple credit packs?

Yes. You can buy more credits anytime, and additional packs simply add to your existing balance. Many users buy a Starter pack first to try the product, then upgrade to Pro Pack once they're hooked.

Do credits expire?

Never. Credits you buy stay in your account forever. Whether you use them tomorrow or next year, they're yours. The only thing that "expires" are launch bonuses (which you receive when you buy) — those credits also stay forever once granted.

Are you a subscription service?

No. TruthStamp uses a credit pack model — you buy credits once, they never expire. There's nothing to cancel, no auto-renewals, no recurring charges. We may add an optional subscription tier in the future for users who want unlimited stamps, but for now, credits work better for how most people use TruthStamp.

Do you offer discounts for students, nonprofits, or open-source projects?

Yes. We offer 50% off all paid plans for verified students, nonprofit organizations, and open-source maintainers. Email support@truthstamp.io with proof of eligibility (student ID, nonprofit registration, or GitHub org link).

Why is paying with digital assets cheaper?

Card and bank payments charge us about 2.5% in processor fees. Digital asset payments don't have those fees, so we pass the savings on as a 10% discount. Same product, same credits, lower price.

What payment methods do you accept?

We accept all major credit and debit cards (Visa, Mastercard, Amex, RuPay), UPI, net banking, and select wallet payments via our payment processors. Subscription billing is automatic.

Is my payment information secure?

Yes. We never see or store your payment information. All transactions are processed by PCI-DSS-compliant payment providers. We only store the last four digits of your card and an opaque token for renewals.

Do you offer refunds?

Credit purchases are non-refundable once completed, since credits can be used immediately. We do issue refunds for technical errors (duplicate charges, platform failures, etc.). Read our full Refund Policy →

Will I receive a tax invoice?

Yes. Every paid invoice is sent to your email with full GST details (for Indian customers) or VAT details (for EU customers). You can also download invoices anytime from your account settings.

What hash algorithm does TruthStamp use?

We currently use SHA-256, the industry standard for cryptographic hashing. Your content is fingerprinted in your browser before transmission, ensuring the original never leaves your device unless you choose to share it.

Can I verify a stamp without TruthStamp existing?

Yes. This is one of the most important features. Every stamp is recorded on a public decentralized verification layer that operates independently of TruthStamp. Even if our website disappeared tomorrow, you could still re-fingerprint your original content using any SHA-256 tool, look up the timestamp on a public block explorer, and prove the match. We've open-sourced our verifier to make this easy.

Do you have an API?

Yes — we offer API access for users who want to stamp content programmatically. API calls consume credits at the same rates as stamps created through the website. Contact us for API documentation and bulk credit pricing.

What's the maximum file size I can stamp?

100 MB per file. File stamps cost 3 credits each (regardless of file size up to the limit). For larger files, contact us about enterprise plans.

Are TruthStamp receipts legally admissible?

Blockchain timestamps prove that a specific hash of your content existed at a particular time. They can serve as supporting evidence in disputes, but they do not prove authorship, ownership, or the full integrity of the underlying content beyond the hash. Their evidentiary value varies significantly by jurisdiction and case specifics.We are not a law firm and this is not legal advice — always consult a qualified lawyer for advice specific to your situation. In general, a verifiable on-chain timestamp is significantly stronger than easily alterable alternatives like screenshots or backdatable cloud documents.

What happens to my receipts if TruthStamp shuts down?

Your receipts survive. They live on a decentralized verification layer that operates independently of TruthStamp's servers. We've also open-sourced our verifier and committed to publishing all infrastructure documentation if we ever shut down. Read our full Permanence Promise →

Can I download my stamps as portable certificates?

Yes. Every stamp comes with a downloadable PDF certificate that includes everything needed to verify it independently — the fingerprint, the timestamp, the verification instructions. Save it offline and your proof works forever, on any device, with or without TruthStamp.

Is the content of my stamps copyrighted to me?

Yes. You retain full copyright and ownership of all content you stamp. TruthStamp doesn't claim any rights to your content. We just provide the timestamping infrastructure. See our Terms of Service for full details.

My stamp seems stuck on "Pending." What do I do?

Stamps usually complete in under 2 seconds. If yours is pending for more than 30 seconds, refresh the page — the stamp likely completed but the dashboard didn't update. If it's still pending after a few minutes, contact support@truthstamp.io with your account email and the time of the stamp.

I'm getting "Already stamped" when I try to stamp something.

This means you've previously stamped the exact same content (down to every character). To stamp the same content again, edit it slightly (add a date prefix, a version note, etc.) and try again. This duplicate-prevention is intentional — it stops accidentally creating multiple stamps of the same thing.

My sealed stamp's reveal date passed but it still shows as sealed.

Sealed stamps require an explicit reveal action to make the content public. Visit the stamp on your dashboard and click "Reveal now" — the contents will be published to the verification layer. This requires you to be logged in as the stamp's creator.

My free stamps reset on the wrong day.

Monthly stamp counters reset on the 1st of every month at 00:00 UTC. So if you're in India, your stamps reset around 5:30 AM local time on the 1st. If you believe your counter is wrong, contact support — we can manually reset it for you.