Adduce
One paper certificate. Every problem in legal aid.
Issue. Prove. Settle.
Replacing 12-month manual processes with 400ms on-chain settlement. Adduce is the first vertical credential issuer on Solana, making justice unforgeable, private, and instant for 500M+ citizens.
The first credential issuer for legal aid on Solana.
Generic identity platforms verify “this person is real.” Adduce verifies “this person is eligible for legal aid, here is the case, and here is the payment.” Built on the Solana Attestation Service, Adduce is the only credential issuer that wires issuance directly to case lifecycle management, ZK selective disclosure, and instant USDC settlement.
It is a vertical application for one specific document that the entire justice system depends on. Not a horizontal identity tool, not a case management system, and not a private consortium chain. Adduce is a plug-in: courts keep their existing systems, while Adduce handles the trust layer on a public rail.
Issue. Prove. Settle.
Issue.
The Court Authority issues a cryptographic attestation on Solana via SAS. Citizen-bound and schema-validated, it creates a commitment root for ZK proofs. Survives server failure, is revocable by deletion, and supports protocol-level lawyer reassignment.
Prove.
The Citizengenerates 256-byte Groth16 ZK proofs: “Jurisdiction is DE, not expired” without revealing private data. On-chain verification via alt_bn128ensures document integrity. Lawyers prove assignment via SHA-256 commitments rather than raw public keys.
Settle.
The Lawyer triggers credential-gated payment. USDC flows only when the credential is valid, unrevoked, and the case is closed. The x402 gateway validates the disbursed amount against authorized limits, recording payment references on-chain for audit.
Issued by the court.
Proved by the holder.
Settled in 400ms.
Cryptographic Issuance
The court signs an on-chain attestation binding the citizen to their eligibility tier, jurisdiction, and expiry. A Poseidon commitment root locks all fields cryptographically. No personal data on the ledger. Only commitments and public keys.
Zero-Knowledge Verification
The holder generates a 256-byte Groth16 proof: “I am eligible in Germany and my credential is not expired” without revealing tier, identity, or dates. The verifier gets a mathematical guarantee. Not a promise. Math.
Instant Revocation
Eligibility changes? The court deletes the credential account. One transaction. Instant. Global. Every downstream system immediately sees the credential is gone. No stale certificates floating around for months.
Survives Server Failure
The credential lives on the Solana ledger, not on any ministry server. Even if the court’s IT system goes down, the credential remains verifiable by anyone on the network. Credential longevity independent of infrastructure.
Credential-Gated Payment
Payment only flows when: credential is valid, credential is unrevoked, case is closed, and the ZK proof checks out. 400ms settlement in USDC. No invoice processing. No 6-month wait. Double-spend structurally impossible.
Cross-Border by Default
A French court can verify a German credential without calling Berlin. No consortium. No inter-ministerial agreement. The credential is on a public ledger, so any jurisdiction can read it. No consortium agreements needed.
Bring your own jurisdiction.
Legal frameworks change across borders; your infrastructure shouldn’t have to. Adduce uses a modular, multi-tenant architecture on Solana. Connect to our audited core engine, deploy your local compliance parameters, and launch.
Every case tracked.
Every payment traced.
From credential issuance to final payment, every step is an immutable on-chain transaction. Courts, lawyers, and auditors can verify any case at any time. Nothing happens off the record.
Structured lifecycle
Every case has a clear status: Open, In Progress, Closed, Paid. No ambiguity.
Full trace
Every document hash, credential check, and payment is a Solana transaction with a block explorer link.
Immutable audit log
Append-only. No edits, no deletions. Full accountability for government auditors.
Case closed. Ruling in favor of applicant.
Document anchored. Compressed log created. Initiating payment disbursement.
Payment claimed. 50 USDC received.
issue_credential()verifiedopen_case()doneanchor_document()doneclose_case()doneclaim_payment()settledmark_paid()confirmedStop paying for idle servers.
Pay per cryptographic proof.
Enterprise consortium chains require massive upfront consulting fees and permanent server costs just to keep the network alive. Adduce operates on pure OpEx. You pay fractions of a cent only when a credential is issued or a ZK proof is anchored. No runaway IT contracts. No black box consulting fees.
Track your exact infrastructure burn down to the individual case. Because Adduce utilizes Solana state compression and public RPC routing, your operational costs drop from hundreds of thousands in legacy server maintenance to literal dollars a month. Predictable, transparent, and bound by hard protocol limits.
Certificate-based legal aid systems.
These jurisdictions issue voucher-style legal aid certificates, statutory entitlements that cross institutional boundaries every time a private lawyer uses one. That’s the exact verification problem Adduce solves.
Reference: Latham & Watkins: A Survey of Pro Bono Practices and Opportunities (PDF)
Why Adduce is special.
Adduce handles the hard orchestration details correctly.
Single-artifact anchoring.
Not asking governments to put their court system on a public chain. Just one artifact: the legal aid entitlement certificate, the voucher that authorizes and pays a private lawyer.
Cross-institutional verification.
The certificate is issued by one authority, consumed by another. Currently verified by phone or trust. Adduce makes it cryptographically verifiable across institutional boundaries.
Double-spend prevention.
A lawyer billing the state for a certificate already used or revoked is a real fraud surface. The public chain makes double-spending structurally impossible.
No consortium required.
Private chains need bilateral agreements between every participating ministry. A public chain gives cross-border verification natively. Any node, any country.
Non-sensitive by design.
The certificate data isn’t case content. It’s “person X is entitled to Y hours for matter Z, valid until date D.” Exactly what ZK + SAS handles cleanly.
Regulatory tailwind.
The EU mandates digital identity wallets by 2026. Legal aid certificates must go digital. Adduce is already there, with working code on devnet today.
Vertical specialization.
Not a generic QTSP competing with Yousign or Gataca. Purpose-built for legal aid lifecycle: case workflow, lawyer billing, credential gating, and settlement.
What Adduce is not.
Not a private chain.
No consortium setup, no dedicated nodes, no enterprise consulting fees. One audited program on Solana, shared by all jurisdictions.
Not a case management system.
Case content stays in your existing national system. Adduce handles one artifact: the entitlement certificate. That’s it.
Not a generic QTSP.
We don’t do KYC, digital signatures, or identity wallets. We do legal aid entitlement issuance, verification, and settlement.
Not a generic identity wallet.
Purpose-built for one artifact: the legal aid certificate. Not competing with broad identity platforms. Vertical focus.
Not a replacement for your infrastructure.
Your ministry’s database stays untouched. We slot in underneath one specific workflow you already hate managing.
The entitlement certificate
deserves a public rail.
One artifact. Cross-border verification. Instant settlement. No consortium. Deploy on Solana Devnet today.