At Veriphant, we make use of the world's most powerful supercomputer to make data completely immutable. This supercomputer or network of computers is known as the Blockchain, and is the transactional ledger for the crypto-currency Bitcoin. By creating small transactions, we’re able to insert plain-text cryptographic representations of your data into the irreversible digital currency ledger. We offer data storage too, so you never lose the original file which was finger-printed. You can even add a password, or encrypt your data, or you can look after your own data and only submit the finger-print representation.
The following cat picture has been inserted into the Bitcoin Blockchain by proxy.
All you need to keep for verification is the original file (Unchanged) and the Bitcoin transaction ID, or just save the handy Veriphant receipt URL which contains everything you need: