Install Chrome add-on →
Install Firefox add-on →Journalism
Show what a public page said when a story broke, even after edits.
BitProof
Timestamp files and archive public pages.
Anchor proof to Bitcoin so later edits are detectable. Why this matters →
FILE
Drop your file here
or click to select
File stays on your device. Only the hash is sent.
iPhone quick capture available. ⓘ
What this proves: this file existed by the anchored time and has not changed. Learn more ↗
Advanced options
Hashing your file…
Proof Created
Keep your .bitproof bundle along with the original file.
The timestamp confirms on Bitcoin in ~1-2 hours.
Verify anytime →
Where proof matters
Examples of when verifiable timestamps are useful.
Legal
Capture the page at signing time so later disputes can be independently checked.
Research
Anchor datasets and source pages so publication timelines are verifiable.