Custody Enforcement Layer

Purpose

The Custody Enforcement Layer manages the entire collateral lifecycle via qualified custodians. It ensures that collateral is properly locked, continuously monitored, and liquidated when necessary — all without assets ever leaving custodial infrastructure.

TICS: Transaction Instruction & Confirmation System

TICS is the programmatic bridge between Parthenon Fi's smart contracts and custodian APIs. It translates on-chain credit events into custodian-executable instructions and relays custodian confirmations back to the protocol.

TICS Operations

Operation	API Endpoint	Description
Reserve	POST /collateral/reserve	Pre-authorize collateral reservation. Returns reservation_id and timestamp.
Lock	POST /collateral/lock	Encumber collateral. Assets visible to borrower but transfer-restricted.
Monitor	GET /collateral/health	Retrieve real-time collateral valuation and LTV calculation.
Margin Call	POST /collateral/margin-call	Issue margin call notice to borrower. Start Cure Period timer.
Liquidate	POST /collateral/liquidate	Instruct custodian to liquidate specified collateral amount.
Release	POST /collateral/release	Release collateral encumbrance upon full repayment.

TICS Architecture

Canton Smart Contracts
        │
        ▼
   TICS Engine
   ├── LTV Calculator (dual oracle feeds)
   ├── Margin Call Manager (threshold monitoring)
   ├── Instruction Queue (custodian API calls)
   └── Confirmation Handler (custodian responses)
        │
        ▼
Custodian APIs
├── BitGo (Go Network)
├── Anchorage (Atlas)
└── Zodia (ADGM)

Custodian Integration

BitGo Bank & Trust, N.A.

OCC-chartered national trust bank (Charter #25366, December 2025). Provides:

• Qualified custody satisfying SEC/RIA requirements

• Collateral segregation and encumbrance via Go Network

• Up to $250M insurance coverage via Lloyd's syndicates

• Margin call execution and liquidation processing

• Tri-party Account Control Agreement support

Anchorage Digital Bank

OCC-chartered digital asset bank (January 2021). Atlas collateral management platform provides:

• Real-time LTV monitoring

• Automated margin call processing

• Liquidation execution

• Payment processing

• The Anchorage-Spark partnership ($150M USDC against $222M BTC) is the closest existing precedent to Parthenon's Module 2 architecture

Zodia Custody

Standard Chartered subsidiary, ADGM FSRA-licensed. Provides:

• Institutional-grade custody for ADGM-based counterparties

• English common law compatibility (matching GMSLA governing law)

• Existing FSRA authorization

• Integration target for ADGM deployment phase

Collateral Monitoring

Continuous LTV Monitoring

TICS calculates LTV continuously using dual oracle feeds:

Primary Oracle: Chainlink decentralized price feeds — aggregated from multiple data sources, providing manipulation resistance through consensus-based reporting.

Secondary Oracle: Exchange aggregator TWAP — time-weighted average price calculated across Binance, Coinbase, and Kraken, providing a cross-reference for primary feeds.

Feed Divergence Handling

If primary and secondary feeds diverge beyond a configurable threshold (default: 5%), TICS:

1. Flags the discrepancy for manual review

2. Uses the more conservative (higher LTV) calculation for margin call purposes

3. Pauses automated liquidation until feed reconciliation

4. Notifies all relevant parties (borrower, lender, custodian)

This prevents oracle manipulation from triggering improper margin calls or liquidations.

Margin Call Flow

1

LTV reaches Margin Call threshold (70%)

TICS issues POST /collateral/margin-call.

2

Custodian relays margin notice to Borrower

Cure Period begins (24–72 hours).

3

Cure Period outcomes

• Borrower deposits additional collateral → LTV restored → Loan continues

• Cure Period expires without cure → proceed to next step

4

Liquidation trigger

LTV reaches Liquidation threshold (85%) OR Cure Period expired without cure.

TICS issues POST /collateral/liquidate.

5

Custodian liquidates collateral

Custodian liquidates sufficient collateral. Proceeds applied: Principal + Interest → Surplus to Borrower.

Account Control Agreement

The tri-party Account Control Agreement (ACA) is the legal instrument authorizing custodian actions. It defines:

• Lock conditions: When and how collateral is encumbered

• Monitoring obligations: Custodian's duty to report collateral health

• Margin call procedures: How and when margin notices are issued

• Liquidation authority: Custodian's right and obligation to liquidate upon instruction

• Release procedures: Conditions and process for collateral release

• Dispute resolution: Procedures if parties disagree on collateral valuation or actions

The ACA is executed at onboarding alongside the GMSLA, establishing the custodian's role as collateral agent for all subsequent transactions.