Robinhood, SoFi, and MetaMask Join Fireblocks to Launch the Open Transaction Layer (OTL)

OTL is positioned as a shared framework to eliminate this fragmentation. By publishing open specifications for secure and compliant transaction coordination, the alliance aims to create a standard that any financial institution, wallet, payment provider, or blockchain ecosystem can adopt, reducing the friction of multi-party onchain interactions .

Who is Behind OTL? A Who's Who of Modern Finance

The breadth of OTL's founding membership is its most striking feature. The alliance unites competitors and collaborators from every corner of the digital asset value chain :

• Infrastructure & Custody: Fireblocks, MetaMask, WalletConnect, Zengo, MoonPay, Privy + Bridge (a Stripe subsidiary)
• Trading & Brokerage: Robinhood, SoFi, eToro, FalconX, Wintermute, B2C2, Zerocap
• Payments & Money Movement: Checkout.com, Triple-A, Taptap Send, Tazapay, Xendit, Coins.ph, Orbital
• Banking & Tokenization: Cross River Bank, Securitize, zerohash
• Blockchain Foundations (via the Blockchain Payments Consortium): TON Foundation, Stellar Development Foundation, Polygon, Monad Foundation, Solana Foundation, Sui Foundation, and Mysten Labs

This group reflects a deliberate effort to represent every type of counterparty that participates in onchain value transfer, from a regulated U.S. bank like Cross River Bank to a self-custody wallet like MetaMask .

The Technical Layers: Identity, Messaging, and Coordination

OTL is not a single product but an open protocol stack built on several standardized components. The launch outlines four primary technical layers :

1. Identity: A standardized method for counterparties to identify, authenticate, and verify each other. This draws on existing standards like W3C Decentralized Identifiers (DIDs), creating a common identity language for onchain participants .
2. Session / Coordination: A shared coordination plane that allows transacting parties to negotiate and manage the lifecycle of a transaction, replacing custom, point-to-point coordination processes .
3. Messaging: A standardized messaging format for all communication involved in a transaction. This ensures that critical information—such as compliance data, settlement instructions, and confirmations—is exchanged reliably across different systems .
4. Transport / Delivery: The secure communication channel through which the coordinated data flows, ensuring the reliable delivery of information between counterparties .

The alliance emphasizes that OTL specifications are open and not owned by any single vendor, encouraging broad adoption across the industry .

A Chain-Agnostic and Compliance-Ready Framework

A core principle of OTL is that it must work across any blockchain. Its design is explicitly chain-agnostic, a necessity underscored by the participation of foundations from several major Layer-1 and Layer-2 ecosystems, including Solana, TON, Polygon, and Stellar . This means a transaction coordinated through OTL could, in principle, involve assets or identities on multiple different chains simultaneously.

Regulatory compliance is another foundational pillar. The initiative is framed as a standard for secure and compliant transaction coordination . While the launch does not provide a granular list of embedded compliance controls, it positions OTL as the infrastructure layer where compliance-oriented workflows—such as counterparty identity verification, transaction-specific messaging, and auditable coordination logs—can be executed in a standardized, repeatable manner .

Coverage Across Four Counterparty Types

OTL's structure explicitly covers the four main archetypes of onchain participants :

• Traditional Finance (TradFi): Regulated financial institutions, exemplified by founding member Cross River Bank.
• Centralized Finance (CeFi): Centralized trading firms, exchanges, and brokerages like Robinhood, SoFi, and Wintermute.
• Payments: Global payment service providers like Checkout.com and regional leaders like Coins.ph.
• Non-Custodial Wallets: Self-custody platforms and infrastructure like MetaMask and WalletConnect.

By including all four in its founding alliance, OTL signals that it aims to be the coordination standard for an integrated, rather than siloed, onchain financial system.

What About AI Agents?

The launch of OTL arrives amid a wave of interest in AI agents transacting onchain. While some third-party coverage links OTL to the needs of AI-driven agents , the official launch materials from the alliance focus squarely on coordination between human-operated institutions, wallets, and payment providers . OTL's standardized identity and messaging layers would, however, provide necessary infrastructure for autonomous agents to securely identify themselves and coordinate with other entities. This suggests that while AI agents are not the central narrative of OTL's launch, the standard could serve as foundational plumbing for an autonomous financial future.

Origins in the Blockchain Payments Consortium (BPC)

OTL does not appear out of nowhere. It represents a significant expansion of the Blockchain Payments Consortium (BPC), an initiative that Fireblocks co-founded in December 2025 to create shared standards for stablecoin payments across blockchain networks . The BPC, which includes the foundations for Monad, Polygon, Solana, Stellar, Sui, and TON, provided the initial nucleus of blockchain ecosystem support, which OTL has now broadened to include a much larger and more diverse group of financial players .