When it gets dark, Prague magically turns itself into city of gold. All the tourist sights are lit as if night never came. Charles Bridge keeps drowning in sea of people long after last rays of Sun were changed with golden glowing street lamps. You can hardly see people without cameras taking pictures of other people taking pictures of…

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If you look beyond the obvious, you can see silhouette of a statue on background of shining church, a soldier from stone hidden by darkness of a river, hidden street lamp that was last time cleaned in times of kings and queens and magical show of light and dark fighting for the streets of Prague.

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How to prove ownership of your pictures

You might ask what mean the strings below the pictures. It’s a hash. You take your picture, create hash by computing sha256 hash and convert it into base64 string. But why all this? Since the picture itself is not saved into STEEM’s blockchain, you need some representation of the picture saved in blockchain and a hash is the best way to do it. Blockchain record history irreversibly so if you save something into it, anyone can check the date it was stored there and since you need a private key to store data into blockchain, nobody else (who doesn’t know the private key) could not do it, thus it proves your ownership of the picture. To be precise, you can prove that you had the picture at certain date but if you just took the picture and later place it into STEEM’s blockchain, you are the first one to do it and so you can prove the ownership and nobody else since anybody, how just copy that and do the same, will do it later than you.