Certelo Launches Privacy-First Platform for Blockchain-Verified Proof of Existence

London, United Kingdom - September 20, 2026.

Digital proof-of-existence platform Certelo, operated by Evoblox Ltd., officially launched today. The service gives law firms, audit teams, researchers, IP professionals, creators, and enterprise teams a frictionless way to create independently verifiable cryptographic evidence linking a specific digital file fingerprint to a publicly recorded blockchain transaction.

A matching file can later be verified against that record to demonstrate that its exact SHA-256 fingerprint had been registered no later than the referenced blockchain block.

In an evolving digital landscape where legal documents, contracts, software builds, and synthetic media can be modified or backdated in seconds, establishing a verifiable chronological record for critical data has become increasingly important. Certelo addresses this need by generating a unique SHA-256 cryptographic fingerprint of a file directly within the user’s browser and anchoring that fingerprint to the Electra Protocol (XEP) blockchain.

The platform eliminates traditional onboarding barriers: users do not need to register, create accounts, or manage crypto wallets to create independently verifiable blockchain proof records.

“People shouldn't have to fill out registration forms, create accounts, or manage complex crypto wallets just to create independently verifiable evidence for a sensitive document,” said Marc Cathomen, CEO of Evoblox Ltd. “Certelo puts the underlying blockchain entirely in the background. Whether an audit firm is securing evidence trails, a lawyer is documenting a contract version, or a creator is recording a work before it enters an AI-driven web, creating a proof record takes seconds.”

Privacy by Design with Local Fingerprinting

Privacy forms the core of Certelo's technical design. Unlike conventional cloud platforms, Certelo operates on a zero-upload model. The original document never leaves the user’s device and is never uploaded to external servers. The SHA-256 fingerprint is calculated entirely within the local browser session.

This approach allows legal counsel, auditors, and enterprise teams to create blockchain evidence for highly confidential assets, such as pending patent applications, trade secrets, unreleased source code, financial audit materials, and litigation records—without exposing the underlying document to third parties.

When verification is required, the document is re-hashed locally and its resulting fingerprint can be compared with the fingerprint recorded in the public blockchain ledger.

Engineered for Legal, IP, and Audit Professionals

Certelo provides an independently verifiable, tamper-evident record of document fingerprints across critical corporate and legal workflows:

• Legal & Contract Management: Create independently verifiable blockchain records for contract drafts, non-disclosure agreements, and litigation materials, helping establish which exact document fingerprint was recorded at a given stage in time.

• Intellectual Property & Innovation Records: Create independently verifiable chronological evidence for patent documentation, trade secrets, industrial designs, and software materials before official filing or publication.

• Audit & Compliance Trails: Provide audit firms and compliance officers with independently verifiable evidence of the fingerprint and chronological registration of financial logs, corporate disclosures, and regulatory materials.

• Creative & Digital Media: Help authors, designers, musicians, and filmmakers create independently verifiable evidence that a specific version of a manuscript, media file, or creative asset was registered by a given stage in time.

• AI & Synthetic Asset Provenance: Create blockchain-anchored records for AI-assisted graphics, code, and synthetic media, allowing a specific file version to be independently linked to a historical blockchain record.

Powered by Electra Protocol (XEP): Public, Open-Source Blockchain Infrastructure

Certelo selected Electra Protocol (XEP) as its underlying public ledger because of its open-source architecture, distributed network, practical transaction model, and low transaction overhead.

Electra Protocol is an established, open-source Layer-1 blockchain maintained by a distributed community of contributors. The network supports real-world applications including digital payments, microtransactions, and emerging data-integrity use cases.

Its Proof-of-Stake consensus mechanism and low transaction overhead provide the performance required for high-volume document fingerprint anchoring.

By anchoring document fingerprints to Electra Protocol, Certelo creates public blockchain records that are independently verifiable without relying on Certelo’s internal database, servers, or continued operation. Once included and sufficiently confirmed in the blockchain, a record is resistant to retrospective modification and can be verified directly against Electra Protocol network data.

Independent Verification by Design

Certelo is designed so that verification does not depend on Certelo continuing to operate.

The original document can be hashed independently using SHA-256, and that fingerprint can be compared directly with the doc_hash value recorded in the Electra Protocol transaction.

This means that verification does NOT require:

• a Certelo user account;

• access to a private Certelo database;

• Certelo’s internal infrastructure;

• or Certelo remaining in operation.

The proof is tied to the public blockchain record rather than to a private service database.

Availability

Certelo is live and accessible globally today. Users can explore the platform and create digital proof records instantly with no account required at Certelo.io.

About Certelo

Certelo is a privacy-first, zero-registration proof-of-existence platform operated by Evoblox Ltd.

By combining browser-based SHA-256 fingerprinting with public blockchain anchoring on Electra Protocol (XEP), Certelo enables individuals and organizations to create independently verifiable evidence of document integrity and prior registration without uploading the original file.