depositinterop.com & .eth — Deposit Interop Identity

The tokenized deposit ecosystem is not one system. It is many systems — JPMorgan’s Kinexys on Base and Canton, HSBC’s tokenized deposit service on Canton, Lloyds on Canton, BNY Mellon’s Digital Cash on its own platform, Custodia Bank’s stablecoin on Ethereum mainnet, and dozens of bank-specific implementations being built simultaneously across jurisdictions. Each bank issues its own deposit tokens, on its own infrastructure, under its own authorization framework. Each system is technically distinct. Each operates under different bank regulations, different reserve requirements, different AML frameworks, different settlement finalities.

This fragmentation is not a bug — it is the natural structure of a commercial banking system where each bank is a legally independent entity with its own balance sheet, its own regulatory obligations, and its own liability management framework. A tokenized deposit issued by Lloyds is a Lloyds liability — it cannot simply be substituted for a JPMorgan deposit token in a settlement transaction, any more than a Lloyds cheque can substitute for a JPMorgan cashier’s check in a conventional payment.

But settlement requires interoperability. When a DVP trade between an HSBC-custodied tokenized bond and a Lloyds-issued deposit token requires atomic simultaneous execution — when the asset leg and the cash leg must settle in the same cryptographic instant — the fact that HSBC and Lloyds operate on different systems is not a choice to be deferred. It is an infrastructure problem to be solved. Quant’s Overledger has established the production solution: cross-ledger atomic commitment that enables a Lloyds deposit release and an HSBC asset delivery to settle simultaneously across different systems. depositinterop.com and depositinterop.eth anchor the namespace for this cross-platform deposit interoperability infrastructure — the identity layer for the standard that makes multi-bank, multi-ledger atomic deposit settlement institutionally viable.

Quant Overledger and the Production Interoperability Standard

Quant’s Overledger platform provides the technical foundation for tokenized deposit interoperability in the UK GBTD project — connecting six major UK banks whose deposit tokens must settle atomically against each other and against tokenized securities from different custodians. The core mechanism is Overledger’s atomic commitment protocol: when a cross-ledger DVP requires a Lloyds deposit to settle against an Archax-custodied gilt, Overledger coordinates the atomic state transition across both systems simultaneously, ensuring neither leg can settle without the other.

This is technically more demanding than single-ledger atomic settlement. On a single ledger like Canton, atomic settlement is enforced by the consensus mechanism — a single state transition either succeeds or fails for all participants. Across different ledgers with different consensus mechanisms, achieving true atomicity requires a cross-ledger coordination layer that can lock state on both systems simultaneously, confirm that both legs are ready, and release both in a single coordinated commitment. Overledger’s cross-ledger atomic commitment is the production implementation of this coordination layer for tokenized deposits — and depositinterop is the namespace for the institutional identity of this infrastructure.

EnsembleTX, BIS Agorá and the Cross-Jurisdictional Standard

The HKMA’s EnsembleTX programme launched February 2026 with an explicit cross-system design requirement: tokenized assets must settle against tokenized commercial bank deposits across different bank systems, with interbank settlement facilitated via HKD RTGS for final discharge. This architecture — tokenized deposits as the commercial banking layer, RTGS as the central bank finality layer — directly implements the BIS Project Agorá three-layer model.

BIS Project Agorá’s Final Report confirmed that Layer 2 tokenized deposits must be interoperable across commercial banking systems to enable the cross-border settlement that Layer 3 wholesale CBDC provides finality for. Fragmented deposit tokenization, where each bank’s tokens only work within that bank’s ecosystem, cannot provide the cross-border payment efficiency that the tokenized financial system promises. Deposit interoperability is not optional infrastructure — it is the architectural prerequisite for the entire BIS vision of tokenized cross-border settlement.

depositinterop.eth is the on-chain resolution address for this cross-jurisdictional deposit interoperability standard — the ENS anchor where deposit interoperability protocol references, cross-system settlement attestations, and jurisdictional framework mappings are stored as machine-readable on-chain records accessible to settlement infrastructure across banking systems and jurisdictions.

depositinterop in the Complete Deposit Infrastructure Stack

depositinterop is the cross-platform connectivity layer of the PillarsX Deposit namespace — the interoperability identity that sits above individual bank deposit systems and connects them into a unified atomic settlement environment. It connects directly to verifiabledeposit.com/.eth as the compliance verification layer that must be portable across platforms for cross-system deposit settlement, depositintent.com/.eth as the intent formation layer whose mandate authorization must be recognized across different bank systems, atomicdeposit.com/.eth as the atomic execution layer that depositinterop enables across system boundaries, and depositsettle.com/.eth as the settlement execution layer where cross-platform deposit interoperability produces final discharge.

Beyond the Deposit cluster, depositinterop integrates with ledgerinterop.com/.eth as the ledger-level interoperability standard that deposit interoperability builds upon, paymentinterop.com/.eth as the payment-specific interoperability layer, and stablecoininterop.com as the parallel cross-platform standard for stablecoin settlement. Together these namespaces form the complete institutional interoperability infrastructure — from ledger-level connectivity through deposit-specific cross-platform settlement to stablecoin interoperability — covering every dimension of cross-system payment interoperability that Quant, BIS, HKMA, and the GENIUS Act are simultaneously building as the institutional standard for tokenized finance.

Strategic Constellations & Bundle Potential

Bundle 1 — Deposit Interop Core
depositinterop + atomicdeposit + verifiabledeposit — the complete cross-platform deposit namespace from interoperability through atomic execution to lifecycle verification. Targets: Quant/Overledger, UK GBTD participants, HKMA EnsembleTX banks building cross-system tokenized deposit settlement infrastructure.

Bundle 2 — Complete Deposit Infrastructure
depositinterop + depositintent + atomicdeposit + verifiabledeposit + depositsettle — the complete PillarsX Deposit namespace. Targets: DTCC, Euroclear, Fnality — institutions building complete cross-platform tokenized deposit settlement infrastructure.

Bundle 3 — Interoperability Suite
depositinterop + ledgerinterop + paymentinterop + stablecoininterop — the complete cross-platform payment interoperability namespace. Targets: Swift shared ledger participants, BIS Project Agorá implementers, institutions building complete cross-system payment interoperability infrastructure.

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