Can Bitcoin Transactions Be Censored? The Mining Hacker’s Guide to Censorship Resistance

Bitcoin was built to be unstoppable. Satoshi Nakamoto did not design a financial system that asks permission — the entire architecture of Bitcoin exists so that value can move between any two parties on earth without a gatekeeper signing off on the transfer. That is the promise. But in 2026, with the network hashrate surging past 800 EH/s, global regulatory pressure intensifying, and mining pools controlling enormous slices of block production, the question is more relevant than ever: can Bitcoin transactions actually be censored?

The answer is nuanced — and it matters deeply to anyone who mines, holds, or transacts in Bitcoin. At D-Central Technologies, we have been building, repairing, and deploying mining hardware since 2016. Censorship resistance is not an abstract ideal for us. It is the reason this company exists. Every miner we sell, every hashboard we repair, every Bitaxe we ship — it all serves one purpose: keeping Bitcoin decentralized and uncensorable at the base layer.

Let us break down the architecture, the threats, the defenses, and what you as a home miner can do about it.

Bitcoin’s Architecture: Built for Resistance

Before we can assess whether transactions can be censored, we need to understand why Bitcoin’s design makes censorship extraordinarily difficult. Three interlocking systems protect transaction freedom.

The Blockchain: An Append-Only Ledger

The Bitcoin blockchain is a chain of cryptographically linked blocks stretching back to the genesis block mined on January 3, 2009. Each block contains a hash of the previous block, a Merkle root of all included transactions, a timestamp, and a nonce that satisfies the current difficulty target. In 2026, that difficulty hovers above 110 trillion — meaning the computational work required to produce a single valid block is staggering.

This structure guarantees that once a transaction is confirmed and buried under subsequent blocks, reversing it requires re-doing the proof-of-work for every block after it. With over 800 EH/s of combined hashrate securing the network, reorganizing even a handful of blocks is economically and physically implausible for any single entity on earth.

The Peer-to-Peer Network

Bitcoin nodes form a mesh network with no central server. When you broadcast a transaction, your node sends it to its peers, who send it to their peers, and so on. Within seconds, your transaction propagates across tens of thousands of reachable nodes globally. There is no “transaction approval server” that can be shut down. As long as your transaction reaches at least one honest miner, it will eventually be included in a block.

This is why running your own node matters — and why we encourage every home miner to pair their setup with a full node. Your node, your rules. Nobody can lie to you about the state of the blockchain if you verify it yourself.

Proof-of-Work Mining: The Enforcement Layer

Mining is where censorship resistance gets enforced in practice. Miners choose which valid transactions to include in the blocks they produce. The block reward — currently 3.125 BTC after the April 2024 halving — plus transaction fees create a powerful economic incentive to include as many fee-paying transactions as possible.

Here is the critical insight: any miner who censors a transaction is leaving money on the table. If one pool refuses to include your transaction, another pool will happily collect the fee. The competitive, adversarial nature of mining means that censorship only works if virtually every miner on the network cooperates — and that is the scenario we need to examine.

Where Censorship Pressure Actually Comes From

Bitcoin’s design is robust, but it does not exist in a vacuum. Real-world forces apply pressure at specific choke points. Understanding these vectors is essential for defending against them.

Government and Regulatory Pressure

Governments cannot rewrite Bitcoin’s code, but they can pressure the humans and companies that interact with the network:

• Exchange-Level Filtering: Centralized exchanges (Coinbase, Kraken, Binance, etc.) are heavily regulated. They implement KYC/AML, freeze accounts, and can refuse to process withdrawals to or from flagged addresses. This is not Bitcoin-level censorship — it is fiat on-ramp/off-ramp censorship. The transactions still settle on-chain if you can get them there.
• OFAC Sanctions Compliance: The U.S. Office of Foreign Assets Control (OFAC) maintains a sanctions list that includes Bitcoin addresses. In 2022, the Tornado Cash sanctions demonstrated that governments will target specific on-chain addresses. Some mining pools — notably Marathon Digital in 2021 — briefly experimented with filtering OFAC-listed transactions from their blocks before abandoning the practice due to community backlash and the economic irrationality of leaving fees uncollected.
• Network-Level Censorship: In extreme scenarios, a government could attempt to block Bitcoin network traffic at the ISP level, similar to how China’s Great Firewall operates. Bitcoin traffic can be disguised using Tor, VPNs, or satellite links (like Blockstream Satellite), making complete network-level censorship very difficult but not impossible within a tightly controlled jurisdiction.

Mining Pool Concentration

This is the most credible censorship vector in 2026, and it deserves serious attention.

As of early 2026, the top mining pools control the vast majority of global hashrate:

If a government pressures the top 2-3 pools, they could theoretically delay the inclusion of specific transactions. With Foundry controlling roughly 30% of hashrate and operating under U.S. jurisdiction, a compliance order could cause real delays for targeted transactions. But here is the key: delay is not denial. Unless every single pool cooperates with the censorship regime, the transaction will eventually make it into a block. The remaining pools have every economic incentive to include it.

This is exactly why mining decentralization matters — and why we are so passionate about open-source solo mining with Bitaxe and similar devices. Every independent miner is a vote against censorship.

The 51% Attack Scenario

The ultimate censorship attack is the 51% attack: if a single entity controls more than half the network’s hashrate, they can theoretically prevent any transaction from ever confirming by always building the longest chain without it. At 800+ EH/s, acquiring 51% of the network would require controlling approximately 400+ EH/s of mining hardware — tens of billions of dollars worth of ASICs, plus the electrical infrastructure to run them. This is not a realistic threat from any single actor today, but it remains the theoretical upper bound of mining-based censorship.

Real-World Censorship Attempts: What History Teaches Us

Bitcoin’s censorship resistance is not just theoretical. It has been tested repeatedly, and it has held up remarkably well.

China’s Mining Ban (2021)

When China banned Bitcoin mining in mid-2021, it represented the single largest disruption to Bitcoin’s mining ecosystem in history. At the time, Chinese miners controlled an estimated 50-65% of global hashrate. Within months of the ban, that hashrate migrated to the United States, Kazakhstan, Canada, and other jurisdictions. The network difficulty adjusted downward, blocks kept being produced, and transactions continued to confirm. China removed itself from Bitcoin — it did not remove Bitcoin from the world.

The lesson: geographic concentration of mining is a vulnerability, but Bitcoin’s difficulty adjustment algorithm ensures the network recovers from even massive disruptions.

Marathon Digital’s OFAC Filtering (2021)

Marathon Digital Holdings briefly announced they would produce “OFAC-compliant” blocks — filtering out transactions involving sanctioned addresses. The Bitcoin community’s response was swift and unequivocal: this was viewed as an attack on Bitcoin’s fungibility and censorship resistance. Marathon reversed course within months, recognizing that selective transaction inclusion undermined the core value proposition of the network they were securing.

F2Pool’s Transaction Filtering (2023)

In late 2023, it was discovered that F2Pool had been filtering transactions involving OFAC-sanctioned addresses. The community outcry was immediate. F2Pool initially denied and then acknowledged the filtering, eventually reverting the policy. This incident demonstrated both the vigilance of the Bitcoin community and the social cost of attempting censorship — even for a major pool.

The Tornado Cash Sanctions (2022)

The U.S. Treasury’s sanctioning of Tornado Cash smart contract addresses on Ethereum had chilling implications for all of crypto. While Bitcoin’s UTXO model is structurally different from Ethereum’s account model, the precedent set alarms: governments are willing to sanction specific blockchain addresses. Some Bitcoin addresses associated with sanctioned entities do appear on the OFAC list, creating compliance pressure on regulated entities.

Layer 2 and Privacy: Additional Lines of Defense

Bitcoin’s base layer is not the only battlefield. Layer 2 solutions and privacy technologies add significant depth to Bitcoin’s censorship resistance.

The Lightning Network

The Lightning Network routes payments through a mesh of payment channels. Transactions are settled off-chain and only touch the base layer when channels are opened or closed. Key censorship resistance properties include:

• Onion Routing: Lightning uses onion-routed payments (similar to Tor), meaning intermediate nodes only know the previous and next hop — not the full payment path or the sender/receiver identities.
• No Global Transaction Ledger: Unlike on-chain transactions, Lightning payments do not appear on any public ledger. There is nothing for a censor to monitor or filter.
• Redundant Routing: If one routing node refuses to forward a payment, the sender’s node automatically finds an alternative path. Censoring a Lightning payment requires controlling the entire routing topology — effectively impossible in a decentralized network.

CoinJoin and Transaction Privacy

Privacy and censorship resistance are deeply intertwined. If a censor cannot distinguish between transactions, they cannot selectively filter them. CoinJoin implementations (like those in Wasabi Wallet and JoinMarket) combine multiple users’ transactions into a single transaction, making it extremely difficult to trace the origin and destination of funds. While regulators have targeted some privacy tools, the open-source nature of Bitcoin means these tools can always be rebuilt, forked, and deployed beyond any single jurisdiction’s reach.

Schnorr Signatures and Taproot

Activated in November 2021, Taproot with Schnorr signatures makes complex transactions (multisig, Lightning channel opens/closes, CoinJoins) look identical to simple single-signature transactions on-chain. This uniformity is a massive win for censorship resistance: if a censor cannot tell what type of transaction they are looking at, they cannot selectively target specific transaction types.

What Home Mining Does for Censorship Resistance

This is where it gets personal — and where D-Central’s mission connects directly to the censorship resistance discussion.

Every home miner running a Bitaxe, a NerdAxe, or even a full ASIC in their garage is a small but meaningful contribution to mining decentralization. Here is why:

Solo Mining: Your Blocks, Your Rules

When you solo mine, you build your own block templates. You decide which transactions to include. Nobody — no pool operator, no government, no compliance department — stands between you and the mempool. If you find a block, every pending transaction you selected gets confirmed. Period.

Yes, the odds of a solo miner finding a block with a Bitaxe are astronomically low. With a Bitaxe Supra producing around 700 GH/s against a network of 800+ EH/s, you are looking at roughly a one-in-a-billion chance per block interval. But every hash counts. And if enough home miners participate, the collective hashrate of independent, uncensored miners grows — making the network more resilient against any coordinated censorship attempt.

Decentralized Pools: The Middle Ground

Not everyone can or wants to solo mine. Decentralized mining pools like OCEAN (created by Luke Dashjr and backed by Jack Dorsey) offer a compelling middle ground. Unlike traditional pools where the pool operator builds block templates, OCEAN allows individual miners to construct their own templates. This means each miner retains control over transaction selection while still benefiting from pooled rewards.

The Dual Purpose Advantage

Here is something the institutional mining farms will never have: dual-purpose mining. When your miner heats your home in a Canadian winter, the economics fundamentally change. Your “mining cost” is offset by heating savings, meaning you can run your miner profitably at hashrates and difficulties that would destroy the ROI of a pure mining operation. This economic resilience means home miners are harder to squeeze out of the network — and that is good for censorship resistance.

Practical Steps to Protect Your Transaction Sovereignty

Censorship resistance is not something you passively benefit from. It requires active participation. Here is what you can do:

The Bottom Line: Can Bitcoin Be Censored?

Here is the honest answer from a company that has been in the mining trenches since 2016:

Individual transactions can be delayed, but they cannot be permanently censored — as long as the mining ecosystem remains sufficiently decentralized.

The real threat is not a dramatic 51% attack. It is the slow, quiet consolidation of hashrate into a handful of regulated pools that could be pressured into compliance-based filtering. If three pools control 60% of hashrate and all three implement transaction filtering, targeted transactions would face significant delays. They would still confirm eventually through the remaining 40% of hashrate — but “eventually” could mean hours instead of minutes.

This is why every hash matters. This is why home mining matters. This is why open-source hardware like Bitaxe matters. This is why keeping old ASICs alive through repair matters. Every independent miner running outside the compliance-industrial complex is a soldier in the war for transaction freedom.

Bitcoin’s censorship resistance is not a feature that was implemented once and can be taken for granted. It is an ongoing battle — maintained by the collective action of thousands of node operators, miners, developers, and users who refuse to let this technology be captured.

At D-Central, we do not just sell mining hardware. We arm the resistance.

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