VeraFile

A file is either the same—or it isn’t.

Verify that. Independently.

npx verafile verify file.pdf proof.json

No APIs. No systems. No interpretation.

If one byte changes, verification fails.

Try to break it

npx verafile verify example.txt example.proof.json

Now change the file:

echo change >> example.txt
npx verafile verify example.txt example.proof.json

It should fail.

Example

echo data > test.txt
shasum -a 256 test.txt

Create test.proof.json:

{
  "hash": "0x<PASTE_HASH>"
}

Verify:

npx verafile verify test.txt test.proof.json