September 25, 2025 — London
Billions of dollars in institutional Bitcoin remain idle. Custody accounts hold these assets due to counterparty risks and regulatory concerns. BOS (BitcoinOS) aims to change that. On Thursday, the company launched Grail Pro, a protocol that lets custodians put institutional Bitcoin to work—without giving up control.
How Grail Pro Works
Grail Pro mints programmable tokens backed 1:1 by Bitcoin. Custodians can lock BTC and generate zkBTC, a token verified through zero-knowledge proofs. These tokens can be used for lending, trading, or yield strategies. Meanwhile, the underlying Bitcoin stays in custody.
Unlike traditional bridge models, Grail Pro uses a cosigner approval system. Every request to mint or release tokens must be confirmed by at least 16 independent operators. Extra safeguards ensure full institutional oversight.
The system also supports programmable vaults, real-time monitoring, and custom financial products. BOS says these features are essential for bringing Bitcoin into institutional-grade decentralized finance (BTCFi).
Targeting Dormant Capital
Recent estimates suggest more than six million Bitcoin—worth nearly $700 billion—sits idle in custody accounts. Much of this supply remains inactive in trusts or reserves because of counterparty risk concerns.
BOS’s Grail Pro offers a verifiable, custody-preserving way to turn these dormant assets into productive capital. “We’re building what institutions want and need,” said BOS co-founder and CEO Edan Yago.
Pilot and Early Results
In a pilot program, partners minted 100 zkBTC, showing how idle Bitcoin can be mobilized safely. BOS says the pilot proves the model can scale. Custodians can move Bitcoin from passive storage into yield generation, all while preserving compliance and security.
Why It Matters
The launch comes at a notable time. Crypto markets recently saw $1.7 billion in liquidations in just one week. This shows how volatility and speculation still dominate the space. BOS argues that new infrastructure is needed to shift crypto from “casinos to capital markets.”
Yago describes Bitcoin as a “supranational asset”, similar to gold. It doesn’t depend on any single government or political system. For institutions seeking stability in uncertain times, Grail Pro could be a key step forward.
The Bigger Picture
As more corporations and asset managers adopt Bitcoin, demand for secure, compliant, and productive infrastructure grows. Grail Pro’s programmable, verifiable tokens give institutions the tools to integrate Bitcoin into long-term strategies.
If widely adopted, BOS’s vision of BTCFi could make Bitcoin more than a store of value. It could become a foundation for institutional-grade decentralized finance, turning passive assets into active capital.
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