Bitsend – A New Step for Bitcoin Transactions (Proof of Concept)

[aristotelsato]

Hey everyone,

I just want to share something I’ve been working on for a long time.
I’m not a genius, I’m not backed by a big company, I’m just a regular guy who managed to build something new step by step, alone, with passion and persistence.

What you will see in this video is not just an app – it’s a whole ecosystem I created from scratch. The goal was simple:

To make Bitcoin transactions possible even without internet, instantly.

To give users full privacy and security, since everything works offline by default.

To prove that a new hybrid model (cold–hot wallet in one) is possible.

This is only a proof of concept on testnet, but it shows that Bitcoin can be broadcast and managed in ways that weren’t available before.

I know some will doubt, some will criticize, but for me this is just the beginning. I wanted to share it here because Bitcointalk is where real Bitcoiners understand innovation.

I’m open to feedback and ideas.
HERE IS THE VIDEO ->  Proof of Concept Video:
Watch on YouTube


Thanks for taking the time to watch.

– Aristotelis

[FortuneFollower]

Greetings!

First of all - it would be better to make a video from the device itself, as doing it from the phone or camera makes the picture muddy and not fully shown..

How do you achieve it being without the Internet?

[aristotelsato]

Greetings!

First of all - it would be better to make a video from the device itself, as doing it from the phone or camera makes the picture muddy and not fully shown..

How do you achieve it being without the Internet?




Thanks for the feedback! You’re right about the video quality — I’ll try to capture the next demo directly from the device screen so it’s clearer.

As for the “no internet” part: the app doesn’t rely on a traditional online connection to broadcast or refresh. The signing, address generation, balance checking and registration happen locally, fully offline. Then the transaction data is passed through an indirect relay layer that can push it to the blockchain without the device itself being connected.

That’s why you see instant balance refresh and transaction broadcast even without internet on the user’s side. It’s basically a hybrid system — cold wallet security, hot wallet usability.

It’s still early, but the core principle is: users don’t need the internet for their device to work as a wallet.

[cr1776]

How about some description and paper about the concept?  Most people aren't going to spend time watching a video without knowing any technical details.

[ABCbits]

It would be great if you don't create similar or near-duplicate thread. I notice you create 2 other thread about what you build,
https://bitcointalk.org/index.php?topic=5552645.0
https://bitcointalk.org/index.php?topic=5553349.0

Greetings!

First of all - it would be better to make a video from the device itself, as doing it from the phone or camera makes the picture muddy and not fully shown..

How do you achieve it being without the Internet?

Thanks for the feedback! You’re right about the video quality — I’ll try to capture the next demo directly from the device screen so it’s clearer.

As for the “no internet” part: the app doesn’t rely on a traditional online connection to broadcast or refresh. The signing, address generation, balance checking and registration happen locally, fully offline. Then the transaction data is passed through an indirect relay layer that can push it to the blockchain without the device itself being connected.

That’s why you see instant balance refresh and transaction broadcast even without internet on the user’s side. It’s basically a hybrid system — cold wallet security, hot wallet usability.

It’s still early, but the core principle is: users don’t need the internet for their device to work as a wallet.

FWIW, some people would show skepticism when you claim offline balance checking feature. See this discussion thread, Can I check my bitcoin balance without the Internet .

[henry_of_skalitz]

How about some description and paper about the concept?  Most people aren't going to spend time watching a video without knowing any technical details.

Yep, whitepaper would be cool, especially if it were not too big and well written.

[aristotelsato]

UPDATE For My friends

Bitsend – Whitepaper v0.2
The First Offline-First Blockchain Ecosystem
© 2025 Bitsend Network

Abstract
Bitsend introduces a new model for cryptocurrency transactions: an offline-first approach that allows wallets to operate without direct internet connectivity.
Transactions are signed locally, secured by private keys that never leave the user’s device, and then relayed through an indirect relay layer that connects to the blockchain.
Users receive confirmations back through the same resilient relay channel.
Future development includes the BSD Chain – a fully independent blockchain designed for offline-native operation.


Motivation
Traditional cryptocurrencies rely entirely on internet connectivity.
This creates fragility in scenarios where the internet is censored, unavailable, or disrupted (e.g., natural disasters, conflict zones).
Bitsend addresses this gap by creating a system where essential wallet operations can continue without direct internet access.
The system ensures financial continuity and resilience.


System Overview
The Bitsend ecosystem consists of three layers:

• Bitsend App – Generates addresses, signs transactions, manages balances offline.
• Relay Layer – An intermediate channel that forwards signed transactions and delivers confirmations.
• BSD Chain (Future) – A standalone blockchain designed for offline-native operation.

https://i.ibb.co/g4VmyqL/app-relay-blockchain.png

Security Model

• Private keys never leave the device
• Transactions signed locally
• Replay protection and nonce management
• Confirmation receipts ensure verifiability even on weak networks

Use Cases

• Disaster Recovery: Transactions possible even when infrastructure is down
• Censorship Resistance: Operates in hostile environments
• Developing Regions: Enables financial activity without internet
• Backup Layer: A parallel resilient economy complementing mainstream networks

Comparison: External Blockchain vs BSD Chain

Criteria	External Blockchain	BSD Chain
Dependency	Relies on external miners & fees	Independent, own validators & rules
Transaction Cost	Variable, often high	Minimal, stable fee
Offline Resilience	None – requires internet	Offline-first with relay layer
Identity	Bitsend = app on Bitcoin	Bitsend = full Layer-1 ecosystem
Innovation	Common approach, crowded field	First offline-first blockchain

Roadmap

• MVP (Today): Bitcoin relay proof-of-concept
• Testnet: BSD Chain with validators and faucet
• Mainnet: Fully independent BSD Chain with validator governance
• Ecosystem: SDKs, third-party integrations, offline-native apps

© 2025 Bitsend Network – Whitepaper v0.2

[aristotelsato]

BSD Chain – The First Full-Offline Blockchain
Part of the Bitsend Network
© 2025 Bitsend Network

1. The Problem
- All existing blockchains (Bitcoin, Ethereum, etc.) depend entirely on Internet connectivity.  
- Without Internet, transactions cannot be broadcast or confirmed.  
- This creates a resilience gap in scenarios like blackouts, censorship, or infrastructure collapse.  


2. The Solution – BSD Chain
BSD Chain is a new Layer-1 blockchain designed from the ground up for:  

• Offline operation – validators communicate through any available channel (non-IP transport).
• Relay-agnostic – the network doesn't care how many  are transmitted, only that they arrive.
• Finality without Internet – validators sign blocks via consensus and return cryptographic receipts to users.

3. Architecture

• User App – generates and signs transactions fully offline.
• Relay Layer – forwards signed payloads and returns confirmations.
• Validator Mesh – 3–5 validators exchange messages over non-IP channels and finalize blocks.
• Receipts – user receives proof (txid + block height + validator signatures).

4. Security Model

• Private keys never leave the device.
• Nonce + replay protection built-in.
• Consensus: IBFT-like with aggregate signatures → finality in ~5–8s.
• Store-and-forward: transactions cached and retransmitted if signals drop.

5. Use Cases

• Disaster Zones: Operates when the entire Internet is down.
• Censorship Resistance: No central chokepoint to block.
• Developing Regions: Financial access without online infrastructure.
• Backup Economy: A parallel resilient layer that never collapses.

6. Roadmap

• MVP (Done): Bitsend App + relay proof of concept
• Prototype Devnet: Single validator BSD Chain (end-to-end demo)
• Public Testnet “Thessaly”: 3–5 validators, faucet, explorer, receipts
• Mainnet Launch: Fully independent BSD Chain with validator governance
• Offline Ecosystem: SDKs, third-party apps, offline-native DeFi & tokens

7. What Makes It New

• First signal-native blockchain.
• First blockchain with true offline finality (no Internet dependency at all).
• From “app on Bitcoin” → to autonomous Layer-1 ecosystem.
• Strategic moat: no existing competitor can easily replicate this model.

🚀 Bitsend Network Naming

- App = Bitsend  
- Blockchain = BSD Chain  
- Entire Ecosystem = Bitsend Network  


Checkpoints Achieved
 Bitsend app (Android, Compose UI, dual balance concept)  
 Relay server (Python backend)  
 Compact transaction format + signatures (CBOR + ECDSA)  
 cryptographic receipts (prototype tested)  

Next Steps for BSD Chain  
🔲 Consensus module (validator mesh)  
🔲 Block builder & receipts with validator signatures  
🔲 Explorer + faucet  
🔲 Branding & launch of Public Testnet  

© 2025 Bitsend Network – BSD Chain Whitepaper Theory

[memehunter]

and then relayed through an indirect relay layer that connects to the blockchain.

And this is done offline? How? IMO this is just ONLINE. Please dumb it down a bit for people like me as I understand practically nothing. How can a transaction be of any value if not broadcasted.

[aristotelsato]

You're right — at the end of the day, for a transaction to settle on a blockchain it must *reach* the network. 
The important distinction here is not whether **someone, somewhere** has Internet, but whether the **user** needs it.

With Bitsend the wallet itself remains fully offline. Keys never leave the device, and the user doesn’t require Internet to generate, sign, or submit a transaction. 
Instead, a lightweight relay layer transports the signed payload towards the chain. That relay doesn’t have to be IP-based — it can be any channel capable of moving bits from A to B. 

So from the user’s perspective:
- They don’t need Internet. 
- They don’t connect to nodes directly. 
- They get back a cryptographic receipt confirming their transaction. 

Whether that relay path at some point touches the Internet, radio, or any other medium is abstracted away. That’s why we call it “offline-first”: the wallet and user-side experience is 100% independent from Internet availability.

just i want to make my dream true!  i will bypasss the internet school! with my vision and targets and i want people to believe in my project i'm alone wolf on all this road guys i don't even lie!

[henry_of_skalitz]

You're right — at the end of the day, for a transaction to settle on a blockchain it must *reach* the network. 
The important distinction here is not whether **someone, somewhere** has Internet, but whether the **user** needs it.

With Bitsend the wallet itself remains fully offline. Keys never leave the device, and the user doesn’t require Internet to generate, sign, or submit a transaction. 
Instead, a lightweight relay layer transports the signed payload towards the chain. That relay doesn’t have to be IP-based — it can be any channel capable of moving bits from A to B. 

So from the user’s perspective:
- They don’t need Internet. 
- They don’t connect to nodes directly. 
- They get back a cryptographic receipt confirming their transaction. 

Whether that relay path at some point touches the Internet, radio, or any other medium is abstracted away. That’s why we call it “offline-first”: the wallet and user-side experience is 100% independent from Internet availability.

just i want to make my dream true!  i will bypasss the internet school! with my vision and targets and i want people to believe in my project i'm alone wolf on all this road guys i don't even lie!

So it would still need to go through some kind of way to be broadcasted, be it Internet or radio or Sattelite? I just didn't see the concrete answer to how they would be broadcasted, then..

[aristotelsato]

give it a name without  internet!

but with SATELITE  or something else! and no! with bitsend network in the end of the day again we will don't need internet background! it will do all the things you read!