Major U.S. and European banks are abandoning private blockchain consortiums in favor of issuing stablecoins directly on public networks like Ethereum and Stellar, a strategic pivot that reshapes how traditional finance integrates with crypto infrastructure. This shift reflects growing confidence in regulatory frameworks and suggests that banks now view public blockchains as safer and more efficient than building proprietary systems.

Why Are Banks Moving Away From Private Blockchain Networks?

For years, the banking industry pursued a cautious approach to blockchain technology, favoring permissioned networks where only approved members could participate. That orthodoxy is cracking. On September 9, U.S. Bank, the fifth-largest commercial bank in the United States, completed a live pilot transaction using USBDC, its proprietary dollar-backed stablecoin, on the public Stellar blockchain to move value between its North American and European entities. The bank validated the full token lifecycle, including minting, payment redemption, freezing, and clawback functions, while keeping everything integrated with core finance, risk, and compliance systems.

The decision to use a public blockchain rather than a private consortium signals confidence in both the technology and the regulatory environment. U.S. Bank flagged cross-border treasury operations, liquidity management, and collateral mobility as target use cases, suggesting the bank sees real operational advantages in public-chain infrastructure.

Similarly, Qivalis, an Amsterdam-based consortium of 37 banks spanning 15 European countries including ING, BNP Paribas, UniCredit, BBVA, and CaixaBank, confirmed on September 8 that its MiCA-compliant, 1:1 euro-backed stablecoin will launch on the public Ethereum blockchain rather than a permissioned bank network. The decision places European bank-issued digital money directly inside the ecosystem where stablecoin and decentralized finance (DeFi) liquidity already resides. Qivalis has structured reserves with at least 40% in bank deposits across member institutions, with the remainder in high-quality liquid eurozone sovereign assets. Commercial launch is targeted for the second half of 2026, pending the consortium's Electronic Money Institution license from De Nederlandsche Bank.

What Regulatory Changes Are Enabling This Shift?

The move to public blockchains reflects maturation in crypto regulation, particularly Europe's Markets in Crypto-Assets Regulation (MiCA), which establishes clear rules for stablecoin issuance and custody. MiCA compliance has become a competitive advantage rather than a barrier, allowing banks to operate with greater transparency and institutional confidence. U.S. regulators have not yet enacted comprehensive federal crypto legislation, but the Treasury Department and financial regulators have signaled openness to bank-issued stablecoins on public networks, provided they meet anti-money laundering (AML) and know-your-customer (KYC) standards.

The regulatory environment also includes active enforcement against illicit activity. On September 17, the U.S. Treasury's Office of Foreign Assets Control (OFAC) sanctioned BitBank, an Iranian digital asset exchange, over alleged sanctions evasion and transfers to Iran's Islamic Revolutionary Guard Corps. Treasury Secretary Scott Bessent stated that cryptocurrency financing remains within OFAC's enforcement reach and that the department would sanction parties supporting the Iranian government through digital asset channels. This enforcement action demonstrates that regulators are willing to use existing authorities to police crypto activity, which paradoxically increases confidence among compliant institutions that public blockchains can be safely monitored and regulated.

How Are Banks Structuring Stablecoin Infrastructure?

Bank-issued stablecoins on public blockchains require careful integration with existing compliance and risk systems. U.S. Bank's pilot demonstrated that a bank can maintain full control over token lifecycle management, including the ability to freeze tokens and execute clawbacks, while operating on a public network. This hybrid approach allows banks to leverage blockchain's efficiency and liquidity benefits without surrendering control over their currency or customer relationships.

The infrastructure supporting these stablecoins is also expanding rapidly. During the week of September 8-10, the stablecoin and payments ecosystem saw significant development:

• Cross-Border Payments: Circle entered a definitive agreement to acquire Tazapay, a Singapore-based B2B cross-border payments firm, to strengthen its stablecoin payment infrastructure globally.
• Institutional Integration: Tetra Digital Group and Berkeley Payment Solutions partnered to integrate the CADD Canadian-dollar stablecoin into payment infrastructure serving over 500 institutional clients.
• Wallet Infrastructure: Modern Treasury launched non-custodial stablecoin wallets for platforms and end-users, enabling direct custody without intermediaries.
• Industry Coordination: Nacha's Payments Innovation Alliance formed a Next-Gen Currency Project Team focused on stablecoins and tokenized deposits, signaling traditional payment networks are preparing for digital currency integration.
• Enterprise Programs: Wirex added the Tempo network for enterprise stablecoin card programs, extending stablecoin utility into consumer-facing payment products.

These infrastructure developments collectively represent what industry observers describe as the build-out of "compliance-grade connective tissue" between bank, fintech, and on-chain rails. Rather than isolated experiments, banks are now integrating stablecoins into existing payment and settlement systems.

What Does This Mean for Crypto Regulation and Market Structure?

The shift from private consortiums to public blockchains has profound implications for how crypto regulation will evolve. When banks issue stablecoins on public networks, they create a direct link between traditional finance and decentralized ecosystems. This integration makes it harder for regulators to treat crypto as a separate, unmonitored sector. Banks operating on public blockchains must comply with existing financial regulations, and their presence on these networks raises the standard for all participants.

The Treasury's enforcement action against BitBank demonstrates that OFAC can designate Iranian digital asset exchanges and block U.S. persons and entities from transacting with them, just as it does with traditional financial institutions. OFAC's May 1 guidance stated that Iranian digital asset exchanges qualify as Iranian financial institutions, and their property within U.S. jurisdiction remains blocked under the Iranian Transactions and Sanctions Regulations. This regulatory framework extends existing sanctions authorities to crypto without requiring new legislation.

For compliance teams at exchanges and payment providers, the BitBank designation raises screening and counterparty risks around Iranian platforms. Institutions must review wallet exposure, ownership links, and transaction counterparties against OFAC records. However, the action did not establish a general ban on cryptocurrency transactions; instead, it applied existing sanctions authorities to specific Iranian entities and connected financial activity.

The convergence of bank-issued stablecoins on public blockchains and active regulatory enforcement suggests a regulatory model is emerging: public blockchains are acceptable infrastructure provided that issuers and major participants comply with existing financial regulations, including AML, KYC, and sanctions screening. This model differs sharply from the early crypto narrative of regulatory arbitrage and unmonitored networks.

What Are the Practical Implications for Institutions and Users?

For institutional participants, the shift to bank-issued stablecoins on public blockchains offers several advantages. First, stablecoins issued by regulated banks carry lower counterparty risk than stablecoins issued by crypto-native firms, because banks are subject to capital requirements, regular audits, and deposit insurance frameworks. Second, integration with existing payment infrastructure means institutions can move stablecoins through familiar settlement channels. Third, regulatory clarity reduces legal uncertainty around holding and transacting with stablecoins.

For retail users, bank-issued stablecoins on public blockchains may offer greater accessibility and lower friction. Coinbase's rollout of its DeFi Earn product to Brazilian customers on September 9 illustrates this trend. The product routes USDC deposits through the Coinbase app into an audited Morpho vault curated by Steakhouse Financial, with no lock-up and yields set by on-chain borrow demand. The offering has accumulated nearly USD 500 million in total supply since its September 2025 U.S. debut, and the Brazil launch extends this "Lending-as-a-Service" template into Latin America's largest retail crypto market. This model demonstrates how traditional finance distribution channels can deliver crypto-native yield products to mainstream users.

The broader implication is that crypto infrastructure is becoming embedded in traditional finance rather than remaining a parallel system. Banks are not abandoning their core business to become crypto firms; instead, they are adopting blockchain technology as a more efficient rails for specific use cases like cross-border payments and collateral management. This integration suggests that the future of crypto regulation will focus on ensuring that public blockchains meet the same compliance standards as traditional financial networks, rather than attempting to isolate crypto from the broader financial system.