Bitcoin Privacy by H33

Institutional Bitcoin Privacy.

Name: Bitcoin Privacy by H33
Brand: H33

Prove compliance, reserves, and custody without revealing UTXOs, addresses, or treasury composition.

Every Bitcoin transaction is permanently public. Institutional holders -- ETF custodians, corporate treasuries, mining operations -- cannot participate at scale without exposing their entire financial position to competitors, attackers, and front-runners.

No UTXOs revealed. No addresses exposed. Only cryptographic attestations on-chain.

Schedule Demo Privacy Layer Hub

The Problem

Every Bitcoin UTXO is public. Every institutional holder is exposed.

Bitcoin's transparency is its greatest strength for verification and its greatest weakness for institutional adoption. When a publicly traded company holds Bitcoin on its balance sheet, every address, every UTXO, and every movement is visible to competitors, short sellers, and adversaries. When an ETF custodian moves assets between cold wallets, the entire market sees it before the custodian's own compliance team files the report.

ETF Custody

Proof-of-reserves exposes the reserve

Regulators require proof that assets exist. Current proof-of-reserve schemes require revealing specific addresses and UTXO sets. This exposes the custodian's entire cold storage architecture to chain analysis firms and attackers.

Treasury Operations

Every rebalance is front-runnable

When MicroStrategy moves Bitcoin between wallets, the transaction appears on-chain before their board approves the press release. Competitors trade on this information. Market makers adjust spreads. The institution pays for its own transparency.

H33 Bitcoin Privacy

Prove everything. Reveal nothing.

Generate a STARK proof that your reserves exceed a threshold, that your UTXO set satisfies compliance requirements, or that your custody architecture meets regulatory standards. The proof is attested with three post-quantum signature families via H33-74, and a 32-byte commitment is permanently anchored in a Bitcoin OP_RETURN output. The UTXO set, the addresses, the balances -- none of it is ever revealed.

Use Cases

What institutions prove without revealing.

ETF Custody Proof

Prove reserves without revealing addresses

A STARK circuit verifies that the sum of UTXOs controlled by known private keys exceeds the required reserve threshold. The proof is published. The UTXO set is not.

Reserve threshold verification
Custody key attestation
Regulatory filing support

Treasury Attestation

Prove solvency without exposing composition

Corporate treasuries prove total Bitcoin holdings exceed liabilities without revealing individual wallet addresses, UTXO distribution, or custody architecture.

Balance-sheet attestation
Auditor-verifiable proofs
Quarterly reporting support

UTXO Privacy

Prove compliance without revealing transaction graph

Prove that no UTXOs in your set originate from sanctioned addresses, without revealing which UTXOs you hold or which addresses you've interacted with.

OFAC compliance attestation
Chain-of-custody proofs
Sanctions screening without exposure

Provable Reserves

Continuous reserve attestation

Time-bound attestations that reserves exceed a threshold, refreshed on a defined cadence. Regulators verify independently via the public HATS verifier.

Epoch-based reserve proofs
Automatic expiration and refresh
Independent regulator verification

How It Works

STARK proof. H33-74 attestation. OP_RETURN anchor.

Bitcoin's OP_RETURN output supports up to 80 bytes of arbitrary data per transaction. The H33-74 on-chain commitment is 32 bytes -- fits natively. The full proof and attestation bundle lives in Cachee and is retrievable by anyone with the commitment hash.

                
                bitcoin anchoring
            
// 1. Generate STARK proof of reserve threshold
let proof = stark_prove(utxo_set, threshold, ReserveCircuit);

// 2. Attest with three PQ signature families
let attestation = h33_74_attest(proof, [ML_DSA, FALCON, SLH_DSA]);

// 3. Store full proof in Cachee
let cachee_key = cachee_store(attestation);

// 4. Anchor 32-byte commitment in OP_RETURN
let tx = bitcoin_tx(OP_RETURN, attestation.commitment());
// commitment: 32 bytes | OP_RETURN capacity: 80 bytes

// 5. Anyone verifies: fetch from Cachee, run HATS verifier
// No trust required. Only mathematics.

Permanent Anchoring

Bitcoin transactions are immutable.

When an H33-74 commitment is anchored in a Bitcoin OP_RETURN, it inherits Bitcoin's settlement finality. The attestation cannot be altered, revoked by a third party, or removed from the chain. This is the strongest anchoring guarantee available on any blockchain. The proof existed at this block height. That fact is permanent.

Immutable Record

Once confirmed, the OP_RETURN commitment exists for as long as Bitcoin exists. No administrator can delete it. No governance vote can remove it. The attestation timestamp is permanent.

Settlement Finality

Bitcoin provides probabilistic finality that approaches certainty after six confirmations. An attestation anchored at block height N is effectively permanent within an hour of broadcast.

Post-Quantum Attestation

The commitment itself is a SHA3-256 hash -- quantum-resistant. The off-chain proof is signed by three independent PQ families via H33-74. No elliptic curve dependency at any layer.

Regulator Verifiable

A regulator installs the HATS verifier, fetches the proof from Cachee using the on-chain commitment, and verifies independently. No API key. No vendor cooperation required.

What Never Leaves The Institution

Never transmitted. Never stored. Never logged.

× UTXO set

× Wallet addresses

× Treasury size

× Custody architecture

× Cold storage layout

× Rebalance timing

× Counterparty identity

× Transaction graph

Only cryptographic attestations reach the chain.