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Seal your document: if anyone changes it, it will show

Upload a document you already have —PDF, image, Word or Excel— and in seconds it will be sealed: if anyone changes a comma, it shows. It gets its own link, verifiable by anyone in one click and anchored in Bitcoin. Don’t have one to hand? Write it below.

Only someone with the link can see it; it is not indexed. It’s an anonymous demo — nobody sees your text except through the link you receive.

The proof on the public Bitcoin chain completes by itself within a few hours; you don't need to do anything.

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