Document prior art and invention dates. Create timestamped evidence for patent applications and establish proof of conception.
Blockchain Timestamping
Prove it happened.
Prove it happened.
Create cryptographically verifiable certificates for any digital document. No registration required.
Your document’s fingerprint is recorded on the Electra Protocol blockchain, creating an immutable, timestamped, and independently verifiable record. Your file is processed entirely in your browser. We never see or upload it.
Zero upload: your file never leaves your device
Secured by hundreds of blockchain nodes worldwide
FACSIMILE
Try it free, no account needed
Create a Demo Certificate in minutes
See the complete Certelo process before you certify anything for real. The guided Demo is simple, private and clearly marked as not blockchain proof.
- 01Choose a documentYour selected document stays in your browser. Certelo never receives it.
- 02Review its fingerprintCertelo creates the SHA-256 fingerprint locally and explains what it means.
- 03Download the DemoGet a sample Certificate without payment, an account or a blockchain record.
The Process
From File to Protected
CERTELO creates immutable proof in three simple steps. Your document is hashed locally, recorded on the blockchain, and certified forever.
- 01Hash Your FileYour file is hashed locally in your browser using SHA-256. Only the fingerprint leaves your device; your original document stays private.
- 02CERTELO TimestampThe hash is permanently recorded on the Electra Protocol blockchain: immutable, timestamped, and independently verifiable.Certify NowTest Free Demo
- 03Certificate IssuedYou receive a PDF certificate with blockchain proof. Verification is free, instant, and available to anyone; no account required.
Pro Tip: Certify Before Any Public Disclosure. Best practice is to certify BEFORE any public disclosure, including blog posts, GitHub repos, or sales pitches. This ensures maximum protection and creates timestamped prior art evidence.
Certify Your Document NowUse Cases
Who Uses Certelo?
From patent applications to creative works, Certelo provides timestamped proof for any digital document that needs verifiable existence.
Prove contract existence and terms. Timestamp legal documents for disputes and create immutable records of agreements.
Protect designs, writings, artwork, and media. Prove creation date for copyright and establish ownership timeline.
Timestamp research findings and datasets. Document lab notebooks securely and create verifiable records of discoveries.
Legal Clarity
What This Certificate Proves
- Your document existed at or before the blockchain timestamp
- The document has not changed since certification
- The timestamp is independently verifiable
- The proof cannot be backdated or altered
- Does not prove authorship or copyright ownership
- Does not replace official legal registration
- Is not a substitute for qualified legal advice
- Does not guarantee patent or trademark rights
Privacy First
Your File Never Leaves Your Device
We hash your file locally in your browser using the Web Crypto API. Only the fingerprint is sent to our servers; your actual document stays private and secure on your computer.
- Local browser hashing
- No file upload required
- Original stays private
- Works offline too
Document→Browser
↓SHA-256 hash→Certelo
Document never sent · Hash only recordedPartnerships
Partners in innovation
We work with partners who help innovators protect ideas and build new products.
Finding the right patent attorney for your invention
Patai.ch is a Switzerland-based company dedicated to providing inventors with rapid, comprehensive feedback on their ideas from certified patent attorneys. Upon receiving an invention disclosure, Patai leverages a vast network of specialists across various fields and regions. These experts evaluate the invention and provide cost estimates for IP protection, empowering inventors to make an informed, data-driven decision when selecting the ideal patent attorney for their project.
Visit Patai GmbH
Startups. Innovation. Arts. New Work.
Startups. Innovation. Arts. New Work. Löwenberg is home to the Surselva Impact Lab, a vibrant community fostering Swiss startups, creative innovation, and the future of work. Evoblox.io and Patai.ch are members of the Löwenberg community. The platform brought us together and inspired us for CERTELO.
Visit Surselva Impact Lab