Your Identity.
Cryptographically
Yours.
SureMark lets you sign content across the platforms you already use — YouTube, LinkedIn, X, Instagram, Facebook, and leading publications — so the world can verify it's really you.
Get Started — 2 Minutes →The infrastructure of
digital authenticity.
SureMark lets you cryptographically authorize content you've created or been featured in — across social platforms and leading publications.
Built by the co-creators of blockchain, SureMark creates an unforgeable record that a piece of content is really you — before deepfakes and impersonators can exploit your identity.
Every signature
strengthens your credibility.
When you sign content, you're building a verified digital identity that proves "this is really me" — across every platform, every post, every appearance.
Prove It's Really You
A SureMark signature creates an unforgeable, timestamped record that links your identity to your content — publicly verifiable by anyone.
Build a Verified Digital Presence
Each piece of signed content adds to a growing body of authenticated work — making it progressively harder for bad actors to impersonate you.
Stay Ahead of Deepfakes
Cryptographic provenance is proactive protection — not reactive detection. You establish the truth before fraud can take hold.
Three steps.
Two minutes.
Everything you need to get your first signature done — right now.
Log In to SureMark
Head directly to the SureMark app to get started.
Set Up Your Credential (One-time setup)
This is the only setup you'll ever do. It takes less than 60 seconds.
Save your Signing Phrase before continuing. This is your cryptographic key — the only way to authorize content.
Sign Your Content
Your content is waiting for your signature in the dashboard.
Add the Browser Extension Optional
The SureMark Chrome extension lets you verify signed content directly in your browser — instantly see whether any piece of content has been cryptographically authenticated.
Your verified identity
is two minutes away.
Head to app.suremark.digital/login and follow the three steps above to set up your credential.
Schedule a Demo →