1SatSnap Proof
Verify a file
Drop in a file to find out if it was stamped, and when. It is checked against Bitcoin, on this device — the file is never uploaded.
Someone shared this proof—
- file
- —
- stamped
- —
- fingerprint
- —
- transaction
- —
This is only a claim so far. Drop the file in below and this page will check it against Bitcoin.
Drop a file here, or click to choose
Nothing leaves your device — only the check runs.
How this was checked
I have a proof file
A proof file lets this page check a file without asking 1SatSnap anything at all — it reads Bitcoin directly. A proof should outlast whoever issued it.
What a match proves: this exact file existed no later than the block it was anchored in, and has not changed by even one byte since.
What it does not prove: who made the file, or that what it shows is true.