Pre-Clearance Settlement Attestation for Institutional Custodians

The problem we solve

Institutional custodians (Fireblocks, Anchorage, BitGo, Copper, and peers) face a structural problem on every outbound transfer: the receiving address may belong to a sanctioned entity, a mixed-pool service, a stolen-funds laundry, or a customer's own cold-storage wallet. Today the answer is policy-based screening at the orchestration layer, plus optional Chainalysis or TRM Labs annotations after the fact.

JIL Corridor adds a third option: a pre-clearance attestation from a 14-of-20 BFT quorum spread across 13 jurisdictions. The attestation is cryptographically signed, hashes-only (no PII or transaction payload leaves the custodian), sub-second to obtain, and self-authenticating under FRE 902(13) if produced as evidence.

The flow

1. Custodian initiates outbound: a customer requests a transfer through the custodian's existing orchestration.
2. Custodian calls JIL Corridor /v1/preclear: POST with from_address, to_address, asset, amount, customer_context_hash. Hashes only -- no PII, no claim payload.
3. JIL queries the 14-of-20 BFT quorum: each of 20 validators across 13 jurisdictions checks the destination against sanctions, OFAC SDN, FATF travel-rule data, internal blocklists, and previously-attested risk scores.
4. Quorum signs the attestation: 14+ validators sign a structured PreClearance object: { tx_hash_intent, destination_score, jurisdiction_flags, l1_anchor_tx, valid_until }.
5. Custodian decides: proceed, hold for manual review, or block. JIL Corridor never holds funds, never sees the actual transaction; the custodian retains full control.
6. Attestation anchored to JIL L1: the signed pre-clearance record is anchored on the JIL L1 ledger for audit, dispute-resolution, and self-authenticating evidence purposes.

Economics

5 bps is the floor for pre-clearance attestation alone. Custodians who layer the JIL CourtChain anchoring on top (for self-authenticating evidence) add a per-attestation $0.05 fee. JIL never custodies funds, never holds keys, never stores customer data at rest -- this pricing reflects the pure attestation service.

Defensibility

• Hybrid Snowflake + JIL L1. Risk scoring runs in Snowflake (compliant data plane); cryptographic attestation runs on JIL L1 BFT (immutable record). Customers can audit both halves independently.
• 13+ jurisdictions. No single jurisdiction can subpoena the full quorum. Validator addresses live in US (Northeast, Southeast, West), Switzerland, UAE, Singapore, Brazil, Japan, UK, Germany, EU member states. Each jurisdiction has its own legal certification.
• FRE 902(13)/(14) self-authenticating. Each pre-clearance attestation is signed by named validators with NIST-FIPS-certified cryptographic signatures. The attestation is admissible in federal court without a custodian of records testifying.
• Post-quantum ready. Hybrid Ed25519 + Dilithium-III signing on every attestation. Outputs verifiable under classical and post-quantum assumptions in parallel.
• No bridge, no custody, no transmission. JIL Corridor is structurally distinct from a settlement bridge. Funds never touch JIL. Keys never touch JIL. Data never touches JIL.

Custodian integration

JIL Corridor exposes a simple REST API and SDK bindings for Python, Go, TypeScript, and Rust. Request the full API contract specification via /connect.

# Python example
import jil_corridor
client = jil_corridor.Client(api_key=os.environ['JIL_CORRIDOR_API_KEY'])
preclear = client.preclear(
    from_address='0x...',
    to_address='0x...',
    asset='USDC',
    amount_atomic=1_000_000_000_000,  # $1M USDC
    customer_context_hash=hashlib.sha256(customer_record.encode()).hexdigest(),
)
if preclear.recommendation == 'PROCEED':
    custodian.execute_transfer(...)
elif preclear.recommendation == 'HOLD':
    custodian.queue_manual_review(...)
elif preclear.recommendation == 'BLOCK':
    custodian.reject_with_reason(preclear.block_reason)
# Attestation hash always available for audit + evidence:
custodian.log_attestation(preclear.l1_anchor_tx, preclear.attestation_signature)
        

Pilot path

1. Discovery briefing -- 90 min. No data, no NDA. Walk through architecture; confirm jurisdictional fit.
2. Synthetic-traffic dry run -- 3 hours. JIL sends synthetic pre-clearance requests; you instrument latency, signature verification, integration shape.
3. Shadow run on real traffic -- 30 days. JIL Corridor scores 100% of your outbound; you do not change your decisioning. Outputs go to your audit log only.
4. Production rollout -- 90 days. Wire to your decisioning. SLA negotiated. Pricing locked.

The one-line summary

JIL Corridor is the only pillar that runs end-to-end on our blockchain. Custody, transmission, and key control stay with you. We sign the attestation.