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4NK: the self-custodial cloud infrastructure

For fifteen years, Bitcoin has proven that a decentralized network can secure value without any trusted intermediary. Every block, every signature, every verification is performed by the users themselves. No need for a centralized custodian: everyone can verify, everyone can hold.

But outside of payments, the digital world still relies everywhere on trusted third parties:

• centralized clouds and servers,
• messaging platforms,
• digital identity services,
• storage solutions.

These custodians capture data, impose costs, and create points of failure. They are the equivalent of banks before Bitcoin: convenient, but vulnerable and intrusive.

4NK: Bitcoin beyond payments

4NK is a client-side infrastructure layer that extends Bitcoin's native properties to everyday digital uses:

• The resilience of a distributed proof network → every flow becomes verifiable, without relying on a server.
• Money as a universal mechanism → reliable remuneration for security.
• Cryptography as identity → public keys extended into digital identities.

How does it work?

• Encrypted messaging: based on non-interactive secret sharing derived from silent payments. Each message generates a unique, encrypted, and untraceable secret, with no third party involved.
• Off-chain contracts: signed by Bitcoin wallets, validated by peers, and linked to a layer-2 oracle (Signet) regularly anchored on the Bitcoin mainnet.
• Distributed storage: files kept locally between stakeholders or in a mesh network, never in cleartext, never in a public cloud.
• Payments in one scan: native Lightning integration, no Stripe, no PayPal.

Everything is operated client-side (Client-Side Validation). No custodian.

Custodian-killer

Just as Bitcoin killed the need for a central bank to hold and transfer value, 4NK kills the need for digital custodians to identify, exchange, store, and contract.

This is not a new blockchain. This is not a token. It is the natural extension of Bitcoin:

• distributed proofs as a foundation,
• money as a universal rail,
• public keys as digital identities,
• secret sharing as sovereign messaging.

4NK is not a theory

• Notaries: legal acts anchored on a proof layer over Bitcoin.
• SMEs: sovereign document management, serverless messaging.
• Public bodies: integrations underway with operators.
• Healthcare: POC in deployment.

Every time, the model is the same: replace a custodian with Bitcoin + client-side.

The result

Making Bitcoin not only the currency of trust, but also the universal infrastructure layer of the digital world:

• Simpler login: four words + multisignature across devices.
• Simpler payments: compatible with all Bitcoin rails + integrated Silent Payment wallet (web & mobile).
• Cheaper, no CAPEX: more users = more resources.
• Cheaper, no infrastructure: less tooling, less supervision, less complexity.
• More secure: encryption directly by user identities, redundancy included.
• More resilient: no central point, no centralized rights management.
• Fully verifiable cryptographically via the anchoring layer.
• Everything is a contract: compliance with agreements, norms, and standards is cryptographically enforced between final parties, where the proof system is also the payment system.
• As fast as needed: there is always a route to deliver information.

Our focus

• Local AI experiences integrated into a "Chat First" UX, replacing legacy workflows.
• Effective support, separate from core development.

Our ambition

To make Bitcoin not only the currency of trust, but also the universal infrastructure layer of the internet:

• identity,
• messaging,
• contracts,
• storage.

An internet where the user is sovereign, verification is local, and custodians belong permanently to the past.

4NK: the self-custodial cloud infrastructure.

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Looking for more context? Read the full Manifest.