Blockchain data found

Date of transaction:

Signed file details

This page contains information about digitally signed file embedded in the Ethereum blockchain. Since transaction is confirmed this file is permanently certified and proven to exist.

Short code: jg9W6R

Hash amount SHA256

d6ed0499eb3e8de9c73998f6c1bd41acdbeb90ec9653284f0415a5adcfffe3d3

Transaction id

0x622c22c466e74c79ec3ec66eff5bd24e3a7eccff88f049dd6dba072debf91e0e

Sent by

0xfcd661e3ed0f5d2c4788f0f6284855872986f73b

Signed file

File name: 044Crawford11644_-min.jpg

1MB

Signature of this file was calculated and stored in the blockchain transaction.

Verify saved file copy

Place your file here to verify it matches the blockchain record.

Click or drag and drop file here

Security note
Your file won't be uploaded.
All SHA256 hash calculations are performed right on your computer.

How does it work

Cryptographic digest (or hash amount) has been calculated from this file using SHA256 algorithm and then saved in the blockchain. The original link to this file is also now permanently saved.

What does it mean

It means that this confirmed blockchain transaction contains a file (a document), hash amount of which has been permanently stored inside transaction. It is now impossible to modify or backdate this file based on blockchain principle (link). If at later date you want to verify this document, and you have a copy of it, you can upload it using form above, calculate its hash amount and compare with the hash amount stored in the blockchain. Matching hash amounts is a 100% probability that the document is authentic.
Hash function algorithm of SHA256 has been developed by NSA. More info http://en.wikipedia.org/wiki/SHA-2

How to make sure that file matches the signature

You need to calculate SHA256 hash amount and compare it with the one saved in the blockchain.

How to calculate SHA256 hash amount

Upload file (or paste in case of text data) into the form on this page. Hash will be calculated inside the browser and never send over internet. Calculated result will be compared with the file previously saved and result will be shown to you.

If you don't trust our page, feel free to calculate hash amount of your file using independent tools. Just google “calculate sha256 hash”.

You can also calculate hash by yourself, using open source code.