Products Lemma APIProof issuance & verification platformTrust402Delegate to agents, and transactSealSign-in for the agent era — no keys handed over
Use cases Manufacturing & Critical InfraInspection Record AssuranceFinance & FinTechCounterparty Record VerificationPublic SectorCertificate-less ProceduresHealthcareQualified Worker AssuranceProcurement & Supply ChainSupplier Credential MonitoringMedia & ContentContent AuthenticityService & RetailCross-group IdentityAI Adoption (cross-industry)AI Run GovernanceDevelopers & Agent OpsAgent Authority Control ▸ Browse the use-case index
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Healthcare

Credential checks stay rigorous. Staffing gets faster.

Confirm licenses, training and fitness-to-work on the spot, without collecting copies. Because you never hold the personal data, most of the waiting before an assignment disappears.

Receiving facility — checking a presented credential
Not tampered with
DOC HASH0x68d4…9f01
IssuerProfessional association
Issued2026-07-28
SubjectLicense & training completion
Proof classProvenance
Signature matches Tamper check Issuer confirmed
The proof layer
is running now
Verification Center live 3 proof-backed data feeds Verification is free
See it for yourself →
01 — Why LemmaWhat delays staffing is checking the paperwork.

Meeting a staffing standard takes more than having a qualified person present: you have to show on paper that the license is valid, the training was completed, and the person is fit to work. Those documents get copied, checked against originals and filed again at every hire and every renewal. The faster people rotate through a site, the more that manual checking becomes the bottleneck.

It isn't a staff shortage.
It's the checking.

02 — What changesThree things Lemma changes
Intake decisions that never wait on a query

Check whether a presented record is genuine on the spot, without a one-by-one confirmation back to the issuing body.

Pre-assignment check
Record presentedNursing license & training
IssuerProfessional association
Query to issuerNot needed
VerdictNot tampered with
Credentials presented
Nursing licenseValidProof attached
BLS training (2026-05)ValidProof attached
Health check on record (2026-04)ValidProof attached
Fitness-to-work decisionValidProof attached
Renewals, without the filing cabinet

Stop chasing and storing originals. Manage renewals from the proof issued at the time, not from a filing cabinet.

Verify authenticity without holding personal data

Diagnoses and test values never reach Lemma. Tampering is detected from a hash alone, so the exposure you carry stays small.

POST /v1/documents
// Only the hash is sent — never the contents { "integrityHash": "sha256:…", "issuerId": "nurse-assoc" } // What comes back { "docHash": "0x68d4…9f01" }

On health information: we do not handle diagnoses or test values themselves. Proof is attached to the record of the check, or to the fitness decision, and confirmed on presentation.

03 — Threat casesWhat happened when the check became a formality.

Three cases from this area, drawn from the Lemma Critical Briefs. In each one a credential, an authorization or a process passed without being independently verified.

See every Brief in this area →

04 — How it worksThree steps, and that's it.
Issuing the proof
RecordLicense & training completion
IssuerProfessional association
What is sentHash only
Issued 0x68d4…9f01
01Attach a proof
Why it holdsChange one character in the record and it no longer matches the proof.
One API call at issuance, or register it from a form. The body of the record is never sent.
What the person presents
License & training
Proof attached — verify here
02Hand it over
Why it holdsThe proof itself is about 200 bytes. How you deliver it is up to you.
The record carries a verification link. Nothing about how it is presented has to change.
The receiving facility's screen
Not tampered with
SignatureTamper checkIssuer
03They check it
Why it holdsThe receiving side settles it alone, without contacting the issuer.
Open the link and the verdict appears. No account, no key.
05 — Use casesHow it is used in this industry
06 — Latest newsAdoption, and what is moving in this area

See all blog posts →

Healthcare

Where does the waiting
before an assignment actually start?

We map your current credential-check flow with you and identify what holds an assignment up. It starts with a 30-minute call.