Easily create & distribute stamped digital files that can’t be tampered with, faked, or forged – even by AI.
Learning Credentials
Create verifiable diplomas, transcripts, certificates, badges, and more in seconds.
Legal Documents
Stamp wills, trusts, and power of attorney documents.
Identity Management
Create certified IDs that can’t be forged or faked.

Is this image real or AI manipulated? Chainletter co-founder Sol Nasisi speaks on a panel at Boston Blockchain Week. Or did he? Find out using Chainletter’s Verify tool. Find out if it’s real.
AI Fraud Resistant
Chainletter’s blockchain stamping solution is designed to be AI-fraud resistant, ensuring the authenticity of digital records in an era where deepfakes and AI-generated content are increasingly difficult to detect. By cryptographically hashing and timestamping each file on the blockchain, our platform creates an immutable proof of originality that cannot be altered, faked, or regenerated by AI tools. This provides institutions, legal professionals, and creators with verifiable trust that their documents and credentials are genuine—shielding the world from the growing risks of AI manipulation and digital forgery.
Chainletter is the proud recipient of a 2025 development grant from Blockchain accelerator Qubic labs.
Becoming a Trust Hub
How Your Organization Can Benefit
- Create and Distribute tamper-proof digital files
- Increase the credibility of your brand
- Demonstrate your organization’s innovativeness
- Make your user’s lives easier
