Attestmark / Professional attestation

Turn expert review into a trust signal machines can see

Attestmark turns traditional content review into professional attestation—verifying reviewers, binding their approval to the exact version they reviewed, and publishing machine-readable proof that readers, auditors, and AI systems can check.

Maria Chen, MD

Board-certified cardiologist · license verified with the Medical Board of California, 4 March 2026

Reviewed for: Medical accuracy
Content: Understanding Drug Interactions With Blood Thinners healthpublisher.com/anticoagulants/interactions
Approved: 24 August 2026 · version 3
Approved version: sha256:9f3ac2b1e7d4… matches live page

Record ATM-8F4K-92XZ

You already tell machines a doctor reviewed it. Now show them the evidence.

Most publishers already emit reviewedBy and lastReviewed. That describes the review. Here’s what gets added — and what it resolves to.

Your existing markupunchanged

{
  "@type": "MedicalWebPage",
  "@id": "https://example.com/article",
  "reviewedBy": {
    "@type": "Person",
    "name": "Maria Chen, MD"
  },
  "lastReviewed": "2026-08-24"
}

Describes the review. Nothing behind it can be checked.

What Attestmark emitsadded alongside

{
  "@type": "MedicalWebPage",
  "@id": "https://example.com/article",
  "subjectOf": {
    "@type": "CreativeWork",
    "url": "https://attestmark.com/verify/ATM-8F4K-92XZ"
  }}

A separate block, joined by @id. Your schema is never rewritten.

Verification recordchecked 4 minutes ago

Live page matches the approved version

Reviewer: Maria Chen, MDBoard-certified cardiologist
Credential source: Medical Board of CaliforniaLicense verified 4 March 2026
Reviewed for: Medical accuracyApproved 24 Aug 2026 · version 3
Live page: Matches approved versionContinuously compared
Approved version: sha256:9f3ac2b1e7d4a8065c19fb7420d3e8ac

A byline is a claim. Nothing behind it can be checked.

Anyone can type it

“Medically reviewed by Dr. Smith.” Nothing verifies the reviewer, their credentials, or that the review happened.

Edits go unnoticed

A page edited after review still carries the same byline, the same markup, and the same date. Nothing notices.

Everyone takes your word for it

Readers, search engines, and AI systems are left trusting the publisher’s word about the publisher’s own process.

E-E-A-T comes down to real experience, expertise and trust. Attestmark makes yours verifiable — so a reader, a search engine or an AI system can check it.

Get credit for the expert review you already do

What readers see on your page

healthpublisher.com/anticoagulants/interactions

Medications

Understanding Drug Interactions With Blood Thinners

Written by the editorial team · Updated 24 August 2026

Reviewed for medical accuracy by Maria Chen, MDBoard-certified cardiologist · this page matches the version she approvedCheck the record Check the record

Anticoagulants reduce the blood’s ability to clot, which makes them effective at preventing strokes and dangerous clots — and also means other medications, supplements, and even some foods can change how they behave.

Some interactions increase bleeding risk; others reduce the medication’s effectiveness. Talk to your prescriber before starting or stopping anything alongside an anticoagulant.

Verified reviewers

Identity and credentials checked against licensing boards and certifying bodies — not asserted in a bio box.

License verifiedMedical Board of California

Version-locked approval

Each approval is bound to a cryptographic fingerprint of the exact content reviewed, so it covers what it claims to cover.

approved sha256:9f3ac2…
live page sha256:9f3ac2… ✓ match

Continuous monitoring

If the page changes, the record says so, the reviewer is told exactly what changed, and nothing keeps claiming a review that no longer applies.

v3 approvedv4 edited · reviewer notified

Machine-readable proof

A public verification record and valid structured data on your page — evidence that doesn’t depend on your word.

"subjectOf": { "url": "/verify/ATM-8F4K" }

Attestmark / For experts

Your name is your credential. You should control where it appears.

Build a verified expert profile, demonstrate your authority, and become eligible for paid content-review opportunities.

Free — and always will be.

MC Maria Chen, MDBoard-certified cardiologist Identity verified

A page you approved changed · Statins: What to Expect · 3 paragraphs edited

Pages carrying your name · 3

Understanding Drug Interactions With Blood Thinnershealthpublisher.com · version 3 Approved

Statins: What to Expect in the First Monthnorthfieldhealth.org · changed 2 days ago Changed

Review changesApprove v4Withdraw

When to Stop Taking Antibioticshealthpublisher.com · withdrawn 14 May Withdrawn

Approval record · all properties3 sites · 6 external reviewers

128Pages attested

119Match approved version

7Need attention now

14Verified reviewers

PageStatus

Understanding Drug Interactions With Blood Thinnershealthpublisher.comMatches approvedMatches

Statins: What to Expect in the First Monthnorthfieldhealth.orgNeeds re-reviewRe-review

Managing Type 2 Diabetes With Dietnorthfieldhealth.orgMatches approvedMatches

Reading Your Blood Pressure Numbersheartline.coReview expiringExpiring

Migraine Triggers and Preventionhealthpublisher.comWithdrawn by reviewerWithdrawn

Attestmark / For enterprises

Know who approved what, and whether it still applies

For organizations running review across multiple properties, external reviewers and several systems: one cross-system record of professional approval — who reviewed which version, in what scope, what changed afterward, and what needs attention now. Today for published content, and being extended to the policies AI agents run on.

Audit-ready instead of audit-reconstructed.

Attestmark / Get Started

Make your expert review provable

Two ways in — pick the one that fits.

For publishers · pilot program

Put verified review on your pages

Join the pilot program — we set up your first attested pages with you, hands-on.

Join the pilot

For experts · free, always

Take control of your name

Verify your identity free and join the founding cohort of experts.

Join as a Founding Expert

Prefer to talk first? Contact us

Continuous content assurance for regulated and high-stakes information.
Playa Vista, California

Turn expert review into a trust signal machines can see

You already tell machines a doctor reviewed it. Now show them the evidence.

What your page says today

What Attestmark adds

What it resolves to

A byline is a claim. Nothing behind it can be checked.

Anyone can type it

Edits go unnoticed

Everyone takes your word for it

E-E-A-T comes down to real experience, expertise and trust. Attestmark makes yours verifiable — so a reader, a search engine or an AI system can check it.

Get credit for the expert review you already do

Verified reviewers

Version-locked approval

Continuous monitoring

Machine-readable proof

Your name is your credential. You should control where it appears.

Know who approved what, and whether it still applies

Make your expert review provable

Put verified review on your pages

Take control of your name

Quick Links

Features

Others

Turn expert review into a trust signal machines can see

You already tell machines a doctor reviewed it. Now show them the evidence.

What your page says today

What Attestmark adds

What it resolves to

A byline is a claim. Nothing behind it can be checked.

Anyone can type it

Edits go unnoticed

Everyone takes your word for it

E-E-A-T comes down to real experience, expertise and trust. Attestmark makes yours verifiable — so a reader, a search engine or an AI system can check it.

Get credit for the expert review you already do

Verified reviewers

Version-locked approval

Continuous monitoring

Machine-readable proof

Your name is your credential. You should control where it appears.

Know who approved what, and whether it still applies

Make your expert review provable

Put verified review on your pages

Take control of your name

Quick Links

Features

Others

Attestmark is not fully localized in this region yet. You may still request manual verification or enterprise onboarding.