We’re building the trust layer for the digital world

Chainletter Labs makes it easy for any organization to stamp digital records to the blockchain — creating tamper-proof, instantly verifiable proof that no one can alter. Not even us.

Stop liars. Distribute truth.

Our team came together through a shared passion for bringing cutting-edge technology to the publishing world — and soon discovered that our technology could create a global network of truth. One that protects businesses, organizations, and individuals from lying and fraud. In a world where AI can generate convincing fakes of any document, blockchain-stamped records are the new foundation of trust.

The team behind Chainletter

Decades of combined experience as technology thought leaders and entrepreneurs.

Sol Nasisi
Sol Nasisi
CEO and GTM Lead

Marketer and technologist. Founded and worked for a variety of technology companies focused on growth. Leads Chainletter’s go-to-market strategy and market development.

Nick Tantillo
Nick Tantillo
CTO

Recognized web developer with deep expertise in blockchain applications. Hackathon winner and creator of novel technologies including a lightweight Tier 2 blockchain and ZK Proof integration.

Jo Unruh
Jo Unruh
Ops and Finance

Navy veteran (special ops / EOD) with 15+ years of leadership experience in operations, project management, and finance. Keeps Chainletter running and growing.

The principles behind our technology

Truth should be easy to prove
Verifying a record’s authenticity should take seconds, not days — and shouldn’t require special tools or expertise
Trust should outlast any company
Records stamped on the public blockchain are verifiable forever — independent of Chainletter or any other organization
Blockchain should be invisible
Organizations shouldn’t need crypto wallets, blockchain knowledge, or months of implementation to benefit from blockchain technology

Tamper-proof records for organizations that move fast

We combine the best of blockchain and internet technologies to create an easy, scalable solution that empowers organizations to stamp and distribute trusted digital records.

Education

Academic credentials

Blockchain-stamped diplomas, transcripts, certificates, and badges that anyone can verify in seconds.

Legal

Legal documents

Wills, trusts, contracts, and power of attorney with an immutable chain of custody that holds up in court.

AI & LLM

AI skills & artifacts

Provenance and integrity for AI-generated skills, prompts, and agent outputs in a decentralized ecosystem.

Built on research, refined by practice

Our foundational whitepaper laid out the vision for how digital technologies and blockchain can be combined to create a new layer of trust — combating lying, fraud, and misinformation at scale.

Chainletter Labs Whitepaper
Establishing Data Provenance for Any Digital File

Written approximately one year ago, the whitepaper lays out our vision for how blockchain stamping creates verifiable provenance for any digital file. Since then, some terminology has evolved — Postmarks are now Stamps — but the core vision remains. The paper describes the cryptographic foundations, the architecture of the stamping system, and the use cases that drive our product today.

Backed by people who believe in what we’re building

Qubic Labs

Backed by Qubic Labs — Proud recipient of a 2025 development grant from blockchain accelerator Qubic Labs.

Ready to start stamping trusted records?

We’d love to show you how Chainletter can work for your organization.