Everlasting
certifications
Open source blockchain evidence that a file exists at a certain date
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How it works
Use tProof to publish a privacy-preserving hash of a file on blockchain. This proves that the file exists at certain date, certifying the document date with an open source and transparent approach. Anything can be a file: emails, PDFs, websites, photos, videos, procedures and much more.
Each certification is stored on chain in the form of a dedicated NFT. In this way, you won't rely just on us to access your certifications, avoiding any lock-in. You are the true owner, always able to independently access them.
Solution is privacy-focused and te content of the file is not published on chain. You can either decide to store the certified files privately, or make them public. We do also offer custom private file storage services.
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Independent
We have adopted industry standard algorithms, generating multiple proofs at the same time, all independently reproducible
Everlasting
Certifications are recorded as NFTs, owned by you at blockchain level. They will last forever thanks to blockchain everlasting storage
Open Source
Smart contracts are open source and verified. This is why we've adopted open ecosystems like Ethereum and Polygon
Built for everyone
Everlasting certifications
tProof is studied to manage billions of certifications, as it's based on major technologies such as EVM-compatible blockchains (like Ethereum and Polygon) and Arweave for permanent file storage.
Blockchains (like Ethereum) is where the certification happens: by storing file hash, our smart contracts certify the date of your file. Within one transaction we're able to certify file ownership, content and date.
Traditional solutions generate proofs with a proprietary Certificate, that can be invalidated for multiple reasons. When this happens, all previous certifications expires. Blockchain certifications solves this problem, as including the hash into a block equals to store it forever.
Upfront single cost
Pay once, own forever
A big advantage of blockchain technology is how efficient it is to manage data for long-term storage, with a single upfront payment (transaction cost).
While traditional centralized storage services obliges you to keep paying to maintain valid your documents (and certifications), blockchain technology is different. Once the certification has been generated, you'll see it in your wallet and you'll own it for decades. Ideally, forever.
Our certifications are NFT-based, meaning that you can access them from any service that allows you to see the NFTs within your wallet. This makes you feel comfortable as you're not relying on a centralized service.
Composable
Integrate with other solutions
Either you are a business, system integrator, software house, company or a Web3 project, you can integrate our solution.
We offer both native blockchain integration, or simplified APIs, along with the support of our technical team. Make sure to read the Docs to understand key technical details, and feel free to reach out for any need.
Pricing
Hash certification
Business & Enterprise
Hash-with-file
Meet the Team
Co-Founder
Co-Founder
Frequently asked questions
Why a Timestamp Proof?
What is a hash?
Is hashing safe?
How does your pricing work?
Customers & Use Cases
When it comes to IP and copyright, having irrefutable evidence of when you created your work is critical in the case of infringement.
PDF Documents are the most used document formats across businesses. Those, as well as any other file types, can be certified in just a few clicks.
Use tProof to improve transparency, accuracy, and accountability in supply chains.
Protect from frauds by securing data at the source, creating an indisputable record of claim events.
Create immutable records of inspections being executed the right way, protecting your business.
Certify any picture/video to have a proof of their existence at a given date.
You can certify a single email of a whole list of emails, making sure you save a proof of what you have received and when.
