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Paradigm PACTs Proposal Lets Early Bitcoin Holders Prove BTC Control

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Paradigm has published a proposal called PACTs, short for Proof of Address Control Tokens, designed to let early Bitcoin holders prove they still control their wallets without executing an on-chain transaction or moving any BTC.

The proposal, outlined in a post titled PACTs: Protecting Your Bitcoin from a Quantum Sunset, frames the mechanism as a forward-looking defense for long-dormant Bitcoin addresses. It targets holders whose coins have sat untouched for years, potentially since Bitcoin’s earliest days.

Paradigm, a crypto-native investment firm with a long track record of funding Bitcoin development, positions PACTs as a response to the eventual threat quantum computing poses to older Bitcoin key formats. The core idea is that holders should be able to cryptographically demonstrate control over an address without broadcasting a spend transaction to the network.

Why Moving Old Bitcoin Is a Problem

For holders who acquired BTC in its earliest years, moving coins is not a neutral act. Any transaction from a long-dormant wallet generates immediate public attention, with blockchain watchers, media outlets, and traders all scrutinizing the movement for signals about potential selling pressure.

This creates a perverse incentive. Holders who simply want to verify they still have access to their keys, perhaps for estate planning, custodial proof, or institutional compliance, must either accept the market noise that comes with an on-chain transfer or remain silent. Recent examples of large BTC wallet movements triggering market speculation illustrate why dormant holders may prefer an alternative.

Proof of control and proof of spending are fundamentally different objectives. A holder proving control is demonstrating possession of the private key associated with an address. A transaction, by contrast, broadcasts a signed message that actually transfers value. PACTs aims to separate these two actions so one can happen without the other.

How a Non-Movement Proof Could Work

At a conceptual level, a non-spend proof allows a holder to sign a message with the private key tied to a Bitcoin address without creating a valid Bitcoin transaction. The signed message proves the signer controls the key, but no coins move and no transaction enters the mempool.

This is not an entirely new idea in Bitcoin. Message signing has existed as a feature in Bitcoin wallets for years. What the PACTs proposal appears to add is a structured, standardized format for these proofs, one specifically designed to address the quantum computing vulnerability that Paradigm has previously explored in its research on quantum markets.

The distinction matters because older Bitcoin addresses, particularly those using the Pay-to-Public-Key (P2PK) format common in Bitcoin’s first years, expose their public keys on-chain. A sufficiently powerful quantum computer could theoretically derive the private key from the exposed public key. PACTs would give holders a path to prove control and migrate to quantum-resistant formats without first exposing themselves through a standard transaction.

Implications for Bitcoin Transparency

If adopted, a standardized proof-of-control mechanism could change how the market interprets dormant Bitcoin wallets. Currently, wallet inactivity is ambiguous. It could mean the holder is patiently accumulating, has lost access to their keys, or is deceased. There is no way to distinguish these scenarios without an on-chain signal.

A PACTs-style proof could reduce this ambiguity. Holders could periodically demonstrate control without creating the market disruption that accompanies a large transfer. This would give analysts and institutions a new data point for assessing Bitcoin’s effective circulating supply, a figure that matters for capital allocation decisions across the industry.

The proposal also touches on a broader tension in Bitcoin’s design. The network’s transparency, every transaction visible on a public ledger, is both its greatest strength and a source of friction for holders who value privacy. Any verification tool tied to early holders may influence how observers read dormant BTC and whether large, untouched balances are interpreted as lost coins or patient conviction.

For Bitcoin watchers tracking regulatory developments around crypto custody and compliance, a formalized proof-of-control standard could also simplify institutional requirements. Custodians and auditors currently rely on test transactions to verify wallet control, a process that PACTs could replace with a lighter, less disruptive alternative.

FAQ About the PACTs Proposal and Early Bitcoin Holders

What is the PACTs proposal?

PACTs, or Proof of Address Control Tokens, is a proposal published by Paradigm that defines a method for Bitcoin holders to cryptographically prove they control a wallet address without moving any coins. It is specifically designed with quantum computing threats in mind.

Does proving control require moving BTC?

No. The entire point of PACTs is to decouple proof of control from on-chain transactions. A holder signs a structured message with their private key, which demonstrates control without broadcasting a transfer to the Bitcoin network.

Why are early Bitcoin holders central to this story?

Early Bitcoin holders are most exposed to quantum risk because many used older address formats that reveal the public key on-chain. They also hold the largest dormant balances, making any on-chain movement from their wallets a significant market event. PACTs gives them a way to act without creating that disruption.

Disclaimer: This article is for informational purposes only and does not constitute financial or investment advice. Cryptocurrency and digital asset markets carry significant risk. Always do your own research before making decisions.

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Avatar of Sophia Panel

Sophia Panel

02 May 2026, 07:50:22 GMT +0000

Sophia Panel is a cryptocurrency journalist with 10+ years of experience. She reports on token listings, stablecoins, exchanges, and market trends, in plain, clear language. At Coincu.com, she helps readers spot what is moving and why, turning complex trading data into simple insights. Her work often features lessons from top fintech firms and rising crypto startups.

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