The European Central Bank laid out three technical models for issuing central bank digital currency on blockchain networks as financial institutions design settlement infrastructure for tokenized assets.
In a presentation on October 1, the ECB described direct issuance of digital euros on a programmable platform, an interoperability layer that bridges existing RTGS systems to distributed networks, and a model where tokenized reserves back settlement tokens issued by intermediaries. The three pathways are competing technical architectures being tested by central banks and private market participants across Europe.
Direct issuance would place digital euros natively on a blockchain controlled by the ECB, allowing financial institutions to transact without intermediaries. The RTGS interoperability model would connect the Eurosystem's existing settlement infrastructure to external networks through a bridge, preserving current payment rails while enabling asset-token settlement. The reserves-backing model would let private institutions issue settlement tokens fully collateralized by ECB holdings, a structure closer to how stablecoins operate today.
Each model trades off between the ECB's direct control and operational burden against decentralization and private-sector efficiency. Direct issuance grants the central bank full oversight of the network but requires building and maintaining blockchain infrastructure. The bridge model preserves existing governance but introduces technical and operational complexity at connection points. Reserve-backed settlement tokens distribute infrastructure costs to private operators but require stronger prudential frameworks to prevent token issuers from creating credit risk.
Central banks across the eurozone have run pilot programs with tokenized securities and cross-border payments over the past two years. The Bank for International Settlements reported in 2025 that roughly 90 percent of surveyed central banks were experimenting with digital currency architectures, though fewer than half had moved beyond internal testing. The ECB presented three technical choices rather than endorsing a single standard.
EU regulation already contemplates digital euro issuance under a 2023 framework, though the ECB has not yet committed to launch a retail product. The presentation treated onchain settlement of institutional money as a near-term question separate from consumer digital euros. Banks and asset managers in the eurozone have told regulators that without clear technical guidance, they cannot finalize their own tokenization roadmaps.
The ECB presented these three models without ranking them by preference or timeline. The choice among them will depend on decisions by the Governing Council about the central bank's appetite for direct blockchain operations and the degree to which regulators want to distribute settlement functions to private intermediaries. If the ECB selects a preferred model within the next twelve months, market participants will have a clearer picture to consolidate their infrastructure bets.
