Why I created Sellat (and why it matters now)

There’s a strange feeling that more and more creators are starting to notice.

Before, when someone copied you, at least it took some effort. Not anymore. With artificial intelligence, anyone can generate a text, an image, a style or an idea that looks dangerously similar to what you’ve done… and do it in a matter of minutes. And the worst part isn’t just that they copy you. The worst part is that when the time comes to prove you did it first, almost no one has real proof.

An email you sent to yourself doesn’t count. A screenshot doesn’t either. Metadata can be deleted or modified. And saying “I had it before” turns into word against word.

That’s exactly what led me to create Sellat.

I didn’t want to build another “blockchain notarisation” service full of hype. I wanted something simple: the ability to prove that a specific file existed on a specific date, and that it hasn’t been modified since then. Nothing more, nothing less.

Sellat does that. It calculates the digital fingerprint of your file, records it in a verifiable way and gives you proof that anyone can check later. Without needing to understand blockchain. Without having to blindly trust a company. And with the option to add a qualified eIDAS timestamp when it really matters.

It doesn’t claim to replace a notary or prove authorship of anything. It only proves one thing: that that exact version of the file existed at that moment.

In an era where copying is easier than ever, having that proof is starting to stop being something “interesting” and become something useful. Especially for anyone who creates, delivers work to clients, documents the state of something, or simply wants to be able to show that theirs existed before a similar version appeared.

That’s the reason Sellat exists.