Solana Foundation joins Open Transaction Layer as founding partner
The Solana Foundation joined the Open Transaction Layer (OTL) as a founding partner — an industry alliance for protocol standards on identity, compliance, and settlement of on-chain transactions across multiple chains.
What happened
On 28 May 2026, the Solana Foundation announced it had joined the Open Transaction Layer (OTL) as a founding partner. The official post reads: “Solana is a founding partner of the Open Transaction Layer, an open protocol for coordinating onchain transactions.” The Foundation frames OTL as an initiative for “Identity, compliance, and settlement messaging standards that work across Solana and any other chain”. Website: otl.network.
What OTL is
According to otl.network, OTL is an “open protocol stack for coordinating onchain transactions”. The architecture covers four base layers (identity, messaging, transport, session) plus a fifth application layer with examples like merchant checkout, B2B settlement, and agentic payments. The deliverable is “protocol libraries: open-source, interoperable, and designed to be agent-friendly”.
OTL does not define new proprietary standards but builds on existing ones — including W3C Verifiable Credentials, LEI, ISO 20022, IVMS101, x402, DIDComm, MPP, and OID4VCI.
Who is involved
OTL positions itself as an industry alliance, not a single company. The website lists eight blockchain foundations as founding members: Solana Foundation, BCP, Monad Foundation, Mysten Labs, Open Network Foundation (TON), Polygon Labs, Stellar Development Foundation, Sui Foundation.
More than twenty industry partners from payments, wallets, custody, and trading are also listed — including Stripe (via Privy), Robinhood, Revolut, MetaMask, eToro, SoFi, WalletConnect, Wintermute, Securitize, Moonpay, Bridge, Checkout.com, Crossriver, Falcon X, and Zerohash. Contact for OTL routes through Fireblocks per the website.
Status at publication
OTL is in a formation and build-out phase per the website: there is a protocol overview and a flow explorer, but no publicly linked specification documents or GitHub repositories on the homepage. There is no “live” or “beta” designation; the initiative talks about “immediate tracks” and “next tracks”.
What to watch next
- When concrete specifications and open-source implementations are released.
- How OTL positions itself relative to existing standards bodies (W3C, ISO) and to existing cross-chain solutions.
- Which wallets, custodians, or compliance tools integrate OTL components in production.
Not financial advice. This article describes a standards initiative under construction.