Professional trust, finally verifiable
Sealed references, credentials, and content — verified in seconds, tamper-proof forever, and owned by the people they belong to.
Free to create and share · €3 per verification
Professional reference
Written by Sarah Chen · Senior Engineering Manager
Sealed with Attestum™
- End-to-end encrypted
- Tamper-proof
- Independently verifiable
- Owned by you forever
WHO IT'S FOR
Built for everyone who needs proof
For recruiters
Verify references in 10 seconds, not 10 phone calls
Stop chasing referees. Instantly access sealed reference content from a verified author — see their professional history, how their identity was confirmed, and be confident the person behind it is real.
For professionals
Build your reputation. Curate it for every opportunity.
Build a collection of sealed, verified references over time. Curate tailored portfolios for different roles. Share a single link with any recruiter.
For referees & endorsers
Write it once. Make it count forever.
Your professional reputation is valuable — don't let fakes dilute it. Write a sealed reference once and it stands permanently. Endorse the next generation and pass on trust you've earned. No more repeated phone calls for the same person.
For creators & researchers
Prove you made it. Seal your work.
Timestamp and seal any document with your verified identity. Prove authorship, protect your work, create a permanent record. Your file never leaves your device.
THE PROBLEM
Anyone can generate a perfect reference.
Nobody can tell if it's real.
AI has made professional documents trivially easy to create and impossibly hard to verify. Reference letters, credentials, and endorsements that look flawless — but were written by no one.
Before Attestum
- Reference calls take 30–60 minutes and still miss fakes
- Recommendations and endorsements with no way to verify who actually wrote them
- Credentials sit in silos you don't control
- No way to prove who actually wrote something
With Attestum
- Verify a sealed reference in 10 seconds — identity confirmed, content untouched
- Know who wrote it — verified identity, professional history, corroborated across independent sources
- You own your records — share them, download them, take them anywhere
- Sealed records can't be edited or faked, by anyone — not even us
VERIFIED IDENTITY
Know who's behind every reference
A sealed reference is only as trustworthy as the person who wrote it. Attestum verifies identity through multiple independent signals — the more signals that align, the harder it is to fake.
Work email confirmed
The author verified access to a legitimate work email — not a personal account, not a throwaway.
Professional identity corroborated
Their professional presence is independently discoverable — matching profiles across platforms they don't control.
History that can't be manufactured
Archived records going back months or years. A fake identity has no trail — a real one does.
Endorsed by trusted professionals
Senior professionals vouch for newcomers. The weight of an endorsement depends on the reputation of the person giving it.
Each signal is independently verifiable. Together, they make faking an identity more expensive than being real. Trust compounds over time.
Verify people and content
Two ways in, one standard of trust. Every record is verified instantly, can't be faked, and belongs to the person it's about.
Professional Attestations
Sealed references written by verified professionals — encrypted, tamper-proof, and yours to share with any recruiter. Reviews and credentials coming soon.
- ReferencesLive Now
- ReviewsComing Soon
- CredentialsComing Soon
Content Verification
Prove any file existed as-is at a specific moment — documents, datasets, images, creative work. Bind your verified identity to prove you created it. Your file never leaves your device.
- File VerificationLive Now
- Identity-Bound SealsLive Now
- Public Verify PageLive Now
- Project SnapshotsComing Soon
HOW IT WORKS
Four steps from create to verified
The same engine powers every attestation type — references, credentials, document proofs, and more.
Create
Write a reference, upload a document, or submit a credential. Your content is encrypted in your browser before it ever touches our servers.
Seal
A tamper-proof fingerprint of your content is sealed permanently. If anyone changes even one character, the proof breaks.
Own
You control your record. Share it, revoke it, keep it forever. Your professional reputation belongs to you — not to any platform.
Verify
Anyone with a link can verify authenticity in seconds. No phone calls. No intermediaries. No waiting.
See it in action
Clean, fast, and built for professionals who don't have time for complexity.
Screenshot to be added post-deployment
Verification page
What recruiters see when they verify a reference
Screenshot to be added post-deployment
Your dashboard
Manage references, build portfolios, share with anyone
Screenshot to be added post-deployment
Document seal
Seal any file in seconds — your file never leaves your device
TRUST & SECURITY
Why trust Attestum?
We built the system to work even when you don't trust us. That's the point.
End-to-end encrypted
Your content is encrypted in your browser before it reaches our servers. Even Attestum can't read it.
Tamper-proof, permanently
Every record includes a cryptographic fingerprint sealed permanently. If anyone changes even one character, the proof breaks.
Owned by you
Download your records at any time. Even if Attestum disappeared, your cryptographic proof remains independently verifiable.
Own your professional reputation, starting today
Request your first sealed reference or seal a document in under a minute — free.
Free during early access · All features included · No credit card needed
Seal · Share · Verify