This page contains information about digitally signed text embedded in the Ethereum blockchain.
Short code: 8riytH
My name is Chainy.
I'm blockchain engravings project!
I'm the most independent Ethereum based smart contract, which exists for as long as blockchain lives. It's independent from anybody. Even if owner abandon this project, and it will be impossible to look up the data using other viewers or blockchain explorers or scanners, all previously stored proofs and data will be available via the Ethereum API, for example through Parity, Mist or open source viewer.
Hash amount SHA256
Paste text for verification:
Cryptographic digest (or hash amount) has been calculated from this file using SHA256 algorithm and then saved in the blockchain. The original data is also now permanently saved.
What does it mean
It means that this confirmed blockchain transaction contains a file or a text, hash amount of which has been permanently stored inside transaction. It is now impossible to modify or backdate this data based on blockchain principle (link). If at later date you want to verify this data, and(or) you have a copy of it, you can paste 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 data 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 data 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 hash amount 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.