Signatura is the latest product from the people at BitCourt. Learn more »


The world's most secure and
resilient digital signature platform

Sign and notarize your documents on the blockchain.

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1. Send

Upload document or contract and select required signers, granting them immediate access to it.

2. Sign

Participants authenticate themselves to download, review and digitally sign the documentation.

3. Notarize

When fully signed, document is notarized to ensure non-repudiation of its date, content or signatures.

4. Audit

If needed, provide legal and conclusive proof of document's timestamp, integrity and authorship.


Digital Signature

Sign or approve documents between multiple parties through a simple, secure and legally binding process.

Uses: digital contracts, company workflows, petitions, purchase orders, employment paperwork, internal policies.


Notarize any document, generating publicly verifiable proof of its origin, date, authenticity and integrity, without exposing its contents.

Uses: counterfeit-proof digital certificates, digital work attribution, proof of prior knowledge, integrity checks.

Custom Integration

Easily add blockchain-based digital signature and notarization to your application using our libraries and API.

Uses: audits, eGovernment platforms, access control logs, transparency solutions.

Secure and privacy-minded

Blockchain technology

Smart contracts and data immutability provide improvements to digital signature platforms. Signatura is an OpenTimestamps member and uses the Bitcoin blockchain to take advantage of these, while RSK-based smart contracts are planned for more advanced features.


Your sensitive documents and confidential contracts are protected. Client-side encryption preserves your privacy, in order that document content is never exposed to anyone but chosen parties, not even to Signatura.

No risk from third parties

Using a blockchain impedes anyone from tampering or deleting your signatures, ensuring they keep being verifiable if our service is offline or discontinued. Not requiring trust in third parties when signing or timestamping is not just a technical advantage, but a legal one.

Simpler audits

Blockchain audit trail records every step in the signing process. Audits become far simpler: there is no need to read a contract, identify parties and check for their signatures, if it was notarized then every needed signature is already there.

Smart signing

Define signing requirements, for example, not allowing a document to be notarized if a certain deadline date is reached. These requirements are not just software logic, they are blockchain-enforced rules, making them secure and reliable. Coming soon.

Cheaper and safer timestamps

Timestamps in Signatura are permanent. In contrast to common timestamping authority services, there is no expiration date nor linked timestamping processes needed for their preservation, simplifying maintenance and lowering costs.