Notarize your documents on the Bitcoin blockchain

Verifybit offers free certified timestamped proof using OpenTimestamps, the open-source protocol that leverages the immutability of the Bitcoin blockchain to prove the existence of a document at a precise moment in time.

Protected by the highest hash-rate in the world, each timestamp is independently verifiable and remains valid forever, with no recurring costs or dependencies on third-party services.

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Professional notarizing a document on the Bitcoin blockchain

OpenTimestamps (Free)

Batch timestamping: zero costs, same security as Bitcoin, verifiable by anyone.

Bitcoin Security

Record hash-rate, stable protocol since 2009: 51% attacks are economically infeasible.

Independent Verification

Download the certificate and the .ots receipt to verify the existence of the file independently and perpetually, without depending on us.

Zero Knowledge & Privacy

No files are stored on the server: we calculate the footprint (hash) and delete the file instantly, ensuring maximum confidentiality.

Evolutionary Roadmap

Next milestones: advanced dashboards, public APIs, signed PDF certificates, premium services.

Why Bitcoin and not other chains?

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Incomparable hash-rate: definitive protection against block rewriting.
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Unchanged protocol since 2009: guaranteed backward compatibility and longevity.
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Neutrality and decentralization: no central authority can alter or censor data.
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Global verifiability: anyone running a Bitcoin node can validate the timestamps.
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No controversial hard-forks or arbitrary modifications that could invalidate proof over time.

Secure your files today

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