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Three-party Assurance Case

Ask one question. Verify one decision.

One party asks a precise question. The other answers with evidence that stays on their own machine. The source confirms it is quoting the real report. The asker verifies the result and decides without receiving the report or taking ScopeBlind's word for it.

Review the sample requestStep 1 of 4 · guided synthetic Case
Production-faithful sampleSynthetic report. Separate deterministic demo keys. No upload.Human source confirmation, not source-system provenance.
UsedExact claim, report commitment, period, source keys
Leaves this tabNothing unless you download a portable Case
EstablishesOne recipient decision over one closed evidence window
Does not establishStanding assurance or undeclared-route coverage
Recipient request

Define exactly what must be established.

The structured meaning below is what the parties accept. The sample does not let an LLM silently change it.

ClaimNo administrator-booked order in the bound June population had the restricted state.
PopulationAll administrator-booked order events for the bound Meridian sample account population.
Period1 June through 30 June 2026, closed at period end
Source requirementIndependent-copy digest match plus pinned source-owner confirmation
Minimum disclosureResult state, population statement, period, source authority, and commitments
Inspection rightAdministrator report, only after an authorized request and release
Compare your reports first
How the three parties fit togetherRecipient asks, operator answers, source confirms, recipient decides
The three-party relationship: recipient, operator, and source ownerrequest / portable Casepinned confirmationcommitment matchThe report itself never moves.Recipientdefines the question, decidesOperatoranswers with local evidenceSource ownerconfirms the report is real
How it fits together

A Case packages signed decisions and source evidence to answer the one question a recipient actually asked.

  1. 1

    The gate decides

    Sits in front of the agent. Routine work proceeds. Sensitive work waits for a person. Prohibited work stops.

    Legate gate
  2. 2

    Every decision leaves a receipt

    Each decision is signed the moment it happens. What was decided is provable later; positions stay private.

    Signed receipts
  3. 3You are here

    Receipts answer a question

    Receipts and source evidence are bundled to answer one exact question a counterparty asked.

    Assurance Case
  4. 4

    Anyone can check

    The counterparty reruns the math in their own browser. No account, no upload, no taking our word for it.

    Offline verification
Sources and limitsEvidence BOM, authority classes, and trust domains
Source authorityCounterparty confirmation is pending
Source assuranceHuman confirmation, not system provenance
Environmentsample · simulator tested
Trust domainsOperator browser and source-owner credential

The source-owner key, operator observer key, recipient policy, and recipient decision key are distinct. Multiple signatures do not imply independent timing or universal completeness.

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One closed Case. No continuing status.

See the plans