Key Takeaways

• Multi-institution custody utilizes a 2-of-3 multisig model, distributed across three independent institutions. This means that no single party can access your Bitcoin, and no institution can be compromised in a way that results in a loss.
• Each private key is independently generated offline by each institution, then further sharded and securely stored in air-gapped environments.
• When a client initiates a withdrawal, two separate institutions must independently verify and approve the transaction via secure, human-involved video calls to confirm the request is legitimate and ensure the client is not under duress.
• The keys are reconstructed offline, signatures are applied, and the Bitcoin is sent, without the client ever managing a key or seed phrase.
• The system is designed for long-term resilience, inheritance, and secure access, even if one institution fails or is compromised.
• MIC allows clients to securely access their Bitcoin holdings from anywhere in the world, eliminating the need to travel with keys, seed phrases, and other sensitive information.

A Battle-Tested Foundation: Multi-signature Security

Multi-institution custody is built on the backbone of Bitcoin’s most reliable security primitive: multi-signature (multisig) wallets. This setup requires multiple private keys to authorize a transaction, typically in a 2-of-3 setup.

As BitGo explains in this overview, multisig is widely used because it reduces single points of failure, protects against accidental loss, and makes unauthorized access significantly more difficult.

But instead of placing all those keys under one roof, multi-institution custody distributes them across three independent institutions, each with its own people, infrastructure, and controls.

This preserves the benefits of multisig while removing operational bottlenecks and introducing even greater redundancy than relying on a single institution.

How the Multi-Institution Key Structure Works

Multi-institution custody doesn’t reinvent the wheel. It builds on Bitcoin’s battle-tested multi-signature (multisig) architecture and elevates it with institutional-grade practices.

In a standard 2-of-3 multisig setup, three distinct private keys are created, and any two of them must sign a transaction to authorize the movement of Bitcoin.

With multi-institution custody, these three keys are generated independently and held by three independent institutions, each operating under strict security protocols with robust governance and management of cryptographic material.

Here’s how the structure is designed for durability and trust:

• Keys are created offline in secure, air-gapped environments, never exposed to internet-connected systems.
• Each key is sharded, split into multiple cryptographic fragments, so no single person ever holds an entire private key.
• Fragments are stored across multiple geographic locations and within different teams at each institution, ensuring both physical and operational redundancy.

This design drastically reduces the attack surface. Even if one institution were breached, compromised, or became uncooperative, the system remains functional, and client Bitcoin remains secure.

Unlike single-institution multisig, where all keys are managed under one roof (and thus susceptible to internal failure or collusion), multi-institution custody eliminates the custodian as a single point of failure. Control is decentralized, while governance is professionalized.

This structure is not only secure, but also incentive-aligned. Each institution has reputational and regulatory pressure to act in good faith and cannot move assets unilaterally. The end client must explicitly authorize any movement of funds. Without that authorization, no transaction can occur.

The result is a system that combines:

• The ethos of decentralization inherent to Bitcoin
• The robust, fault-tolerant security of multisig
• The resilience of institutional-grade operations
• The peace of mind of not needing to manage keys yourself

It’s the same foundational cryptography that has secured hundreds of billions in Bitcoin for over a decade, just deployed in a more secure and operationally scalable format.

How to Withdraw from a Multi-Institution Vault

When a client wants to move Bitcoin, the process looks like this:

• The client logs into their Onramp dashboard and initiates a withdrawal request by entering the amount of Bitcoin and the receiving address.
• The client schedules a video verification call with a member of Onramp’s operations team to confirm their identity, intent, and authorization.
• After passing verification, Onramp reconstructs its private key offline and provides the first signature.
• The client is then connected to BitGo for a second video verification, followed by independent key reconstruction and signing.
• With two of three signatures complete, the Bitcoin is sent to the destination address.

This process typically takes 24–48 hours, depending on client responsiveness and verification availability. Here is a video that demonstrates the withdrawal process.

Multi-Institution Eliminates Single Points of Failure Inherent in Traditional Custody Models

What happens if one institution goes offline, becomes uncooperative, or is compromised in some way?

Because this is a 2-of-3 model, the other two institutions can still approve transactions and facilitate recovery. Your Bitcoin isn’t dependent on the continued operation of any single entity, not even Onramp.

Additionally, every vault is independently verifiable on-chain, giving you 24/7 transparency into your holdings.

No pooled accounts. No omnibus risk. No hidden counterparties.

What Makes This Different from Other Custody Models

Unlike self-custody, you don’t manage keys or seed phrases.Unlike third-party custody, no single company can move or lose your funds.

Multi-institution custody provides secure access from anywhere in the world, eliminating the need to travel with keys and ensuring operational security is not compromised.

With self-custody setups, particularly multisig, access can be limited by geography or logistical constraints. It might seem secure until you’re traveling or in an emergency and realize you can’t access your Bitcoin without physical access to one or more key locations. Likewise, traveling with a single-signature wallet introduces obvious risks. It can be lost, stolen, or confiscated.

It’s also fundamentally different from traditional custodians. In a conventional custody setup, if someone gains access to your login credentials, whether through phishing, SIM swaps, or device compromise, they may be able to move your funds without additional checks.

That single layer of access becomes a single point of failure. With multi-institution custody, that risk is eliminated. Every transaction requires live video verification with two separate institutions. Credentials alone aren’t enough; human verification and institutional coordination are required for every movement of Bitcoin. Additional controls can be applied on the client's account for further security measures.

With multi-institution custody, your keys are institutionally managed and globally accessible through a structured, secure verification process. You can access your Bitcoin from anywhere, with no downtime and no risk of losing access due to distance, device failure, or disrupted key coordination.

With multi-institution custody, you retain control through:

• Legal title in your name (or trust, LLC, etc.)
• Explicit, auditable authorization for every transaction
• Independent institutions that must act jointly to sign

It’s operationally simple for clients, but institutionally rigorous under the hood.

Final Thoughts

Multi-institution custody solves the frictions that have long challenged Bitcoin investors, whether it’s the stress of managing seed phrases, the limitations of multisig when traveling, or the risk of relying on a single custodian.

By combining open-source Bitcoin standards with institutional-grade security, it offers a way to hold Bitcoin that is both technically sound and operationally practical.

You don’t need to be a security expert. You don’t need to carry keys when you travel. And you don’t need to worry about a single point of failure.

This is how Bitcoin custody should work: secure, resilient, and built for real-life scenarios, not just ideal ones.

Learn more about our multi-institution custody solutions. → https://www.onrampbitcoin.com/products/multi-institution-custody

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