Prove it existed.
Forever.
Drop in any file and walk away with a timestamp that anyone can check — and that keeps working even if this site disappears.
Your file never leaves your device. We only ever see its fingerprint, anchored to Bitcoin so the date can't be forged or revoked.
No accounts to verify. No files to upload. No trust required.
The whole point is that you don't have to take our word for anything. Here's the entire process.
Your file is fingerprinted
Your browser computes a SHA-256 fingerprint of the file on your own device. The file itself stays with you — only the fingerprint travels.
The fingerprint goes to Bitcoin
We commit that fingerprint into the Bitcoin blockchain through OpenTimestamps. Once it's in, the date is fixed and can't be backdated, edited, or quietly removed.
Anyone can check it, anytime
You get a receipt that proves your file existed by that date. It checks out against Bitcoin directly — no Orphograph account, server, or company needed.
What a receipt does — and doesn't — say
A proof tool is only worth anything if it never overstates. So here's the exact line, plainly.
It proves
- ✓This exact file existed in this exact form on or before a specific date.
- ✓The date is fixed to Bitcoin and can't be moved earlier or later after the fact.
- ✓The proof survives you, the platform you stored it on, and us.
It does not claim
- ✗Who made the file, or that you're its author.
- ✗That it's admissible or decisive in any legal or institutional process.
- ✗Anything about whether a tool or person believes the file is "real."
A timestamp answers one question — did this exist yet? — and answers it without asking anyone to trust you. That's a narrow promise we can keep completely, which is exactly why it holds up.
For the moment you'll wish you'd dated it
Delivering a client shoot
Anchor the finished gallery the day you hand it over, so the set of frames you delivered is fixed in time — before anyone re-edits or re-shares it.
Drafts before the deadline
Stamp a draft when you finish it. If questions come up later about when a version existed, the date is already settled and checkable.
Source material and notes
Fix the date a document or recording was in your hands, without putting the file itself anywhere it could leak.
Anything worth keeping
Designs, records, research, masters. If it would matter to show it existed by a certain date, ten seconds now beats reconstructing it later.
Start free. Pay only when you need more anchors.
Three anchors are free every 24 hours, no account needed. Beyond that:
- 10 anchor credits
- Use them anytime
- Credits never expire
- Gift to a friend
- 50 anchor credits
- Use them anytime
- Credits never expire
- Gift to a friend
- Unrestricted anchoring
- Private receipts
- Receipt vault
- API access
Crypto bills as a Pack of Fifty for equivalent value. Recurring crypto coming.
9 cryptos accepted (BTC, USDC, ETH, SOL, USDT, LTC, XRP, DOGE, MATIC) · non-custodial via NOWPayments.
The proof outlives us on purpose
The verifier is open source, MIT-licensed, and runs entirely on your own machine. If Orphograph vanished tomorrow, every receipt ever issued would still check out against Bitcoin.
A receipt is a small file. Anyone you hand it to can confirm — for themselves, offline — that the fingerprint was committed to Bitcoin by the date it claims. No login. No call home. No dependency on this company continuing to exist.
# verify a receipt against Bitcoin, locally $ orphograph-verify gallery-2026.ots # fingerprint matches the anchored commitment hash 8f3c…a91d ok anchor Bitcoin block 954,120 date existed on or before 2026-06-17 17:14 UTC ok ✓ proof valid — no server required
The short answers
Do my files get uploaded anywhere?+
No. Your browser computes the fingerprint locally and only the fingerprint is sent. The file stays on your device the whole time — that's why we can never read, leak, or lose it.
What can I actually do with a receipt?+
Show, to anyone, that a specific file existed by a specific date — and let them confirm it independently. It speaks to timing, not authorship, and it isn't a legal determination. It's a checkable fact about when, nothing more and nothing less.
What happens if Orphograph shuts down?+
Your receipts keep working. They verify against Bitcoin through open-source software you can run yourself, so the proof has no dependency on us staying online. That permanence is the entire design.
Why Bitcoin specifically?+
Because once a fingerprint is committed there, the date can't be quietly rewritten by anyone — including us. It's the most durable, hardest-to-forge public record available for this kind of timestamp.
Do I need to understand any of the crypto parts?+
Not at all. Drop a file, get a receipt, keep it. The technical detail is here for the curious, but using the product never requires it.