In blockchain smart contracts, when off-chain data is required, such as election results, weather forecasts, or the current price of Bitcoin, oracles are responsible for bringing this data into the blockchain. Since off-chain data providers (such as oracle services) are not inherently part of the blockchain network, ensuring the authenticity and integrity of the data becomes a crucial issue. By using signature technology, on-chain smart contracts can verify the trustworthiness of the data source and ensure that the data has not been tampered with during transmission.

We have launched a new Rabin Signature Oracle service: 
https://oracle.urchain.com

This oracle data service uses Rabin signatures to sign timestamps, exchange rates, and Bitcoin market data. It can be applied to smart contract systems based on the Bitcoin UTXO model, such as: 
#NOTE https://NoteProtocol.org 
#CAT20 https://catprotocol.org

In smart contracts, when off-chain data is brought onto the blockchain, the contract uses the public key of the data provider to verify the validity of the Rabin signature. By verifying the signature, the smart contract can confirm the integrity of the data and ensure that it is indeed provided by a trusted oracle.

Compared to other signature algorithms (such as RSA or ECDSA), Rabin signatures offer a simpler verification process, making it suitable for resource-constrained smart contract environments and improving the efficiency of on-chain transaction execution.

One application scenario: Using Rabin signatures to ensure the accuracy of cryptocurrency prices such as Bitcoin and Ethereum, as well as fiat currency exchange rates like JPY and EUR, introduced into the blockchain, thereby validating asset operations.

More about Rabin:
https://en.wikipedia.org/wiki/Rabin_signature_algorithm
https://docs.scrypt.io/tutorials/oracle

OK, let me give you a demonstration. I posted a tweet on X to promote my DEX order
https://x.com/lilong/status/1842162477444079697 . If you're using the X app on your phone, you'll see this tweet displayed using OGP technology https://noteprotocol.org/assets/images/x-63675357195872487ff72faebfa45ecc.png . Then, if you open the DEX link through X, you can open the order with a Bitcoin wallet (https://chainbow.io) that supports Action technology and purchase directly, without needing to connect a wallet first like on Ethereum.


I once made a video demonstration of Action technology, and you can see it on X.

https://x.com/NoteProtocol/status/1817887597945069876

The NOTE protocol  is a solution that uses Bitcoin for transaction recording and ownership confirmation, while token and NFT data are recorded through an off-chain indexer. It employs Satoshi Nakamoto's original Bitcoin script for contract validation. Several dApps have already been developed using this protocol, which also integrates Actions technology. One example of a Bitcoin DEX is https://utxo.exchange/, where sell orders created on the platform can be shared across social media channels like X and Telegram. The PSBT transaction signature technology is used in the backend. When it comes to Bitcoin's emphasis on privacy, the key point is ensuring its practical usage. The NOTE protocol and the various technologies implemented with it bring Bitcoin one step closer to being widely adopted by people around the world.

https://noteprotocol.org/

Hello,

I gained some ideas from Solana actions and created the Bitcoin Action protocol. I’m hoping to get some feedback.

———

The Bitcoin Action Protocol Draft

Bitcoin/NOTE Actions is a standardized interaction process. It allows for token transfers and PSBT transaction signing on the Bitcoin blockchain without the need for third-party services like Wallet Connect or wallet-embedded browsers for web script injection. By integrating with the [Open Graph protocol](https://ogp.me), it enables transaction previews on social media platforms like X, Discord, and Telegram. It is also compatible with the BIP21 Bitcoin payment protocol.

Before the appearance of the NOTE protocol (https://noteprotocol.org), Bitcoin dApps were very rare and mostly limited to simple payment protocols like BIP21. From now on, with the introduction of smart contracts, there will be a significant increase in the number of dApps. The powerful Action protocol enables peer-to-peer payments between wallets and dApps, while also greatly enhancing the user experience by leveraging social media traffic.

Read protocol details
https://noteprotocol.org/docs/actions/

https://pbs.twimg.com/media/GYy_LiibQAEK5vT.png

The Bitcoin Action Protocol Draft

Bitcoin/NOTE Actions is a standardized interaction process. It allows for token transfers and PSBT transaction signing on the Bitcoin blockchain without the need for third-party services like Wallet Connect or wallet-embedded browsers for web script injection. By integrating with the [Open Graph protocol](https://ogp.me), it enables transaction previews on social media platforms like X, Discord, and Telegram. It is also compatible with the BIP21 Bitcoin payment protocol.

Before the appearance of the NOTE protocol (https://noteprotocol.org), Bitcoin dApps were very rare and mostly limited to simple payment protocols like BIP21. From now on, with the introduction of smart contracts, there will be a significant increase in the number of dApps. The powerful Action protocol enables peer-to-peer payments between wallets and dApps, while also greatly enhancing the user experience by leveraging social media traffic.

Read protocol details
https://noteprotocol.org/docs/actions/

https://pbs.twimg.com/media/GYy_LiibQAEK5vT.png

The Birth and Realization of Bitcoin Action
July 29, 2024 · 2 min read
During EDCON 2024, the chief contributor to the NOTE protocol, Japan's blockchain technology company ChainBow, released a new interaction protocol between Bitcoin and dApps called Bitcoin Action, and demonstrated interactions between wallets and dApps.

https://noteprotocol.org/assets/images/action-68a68dbca59feacb45f371d1bcc9b84d.png

From the Bitcoin BIP21 protocol in 2011 to Ethereum's Wallet Connect, and then to the Solana Action protocol, wallet and dApp interaction protocols have undergone multiple technological updates, continuously improving user experience.

The earliest BIP21 protocol provided a URI schema for payments, consisting of a receiving address and a transfer amount. Users made payments by scanning QR codes with their wallets, which was a one-way interaction process. Subsequently, updated versions such as BIP70/71/72 emerged, focusing on secure interactions for merchants in Bitcoin payment scenarios.

Since 2017, the rise of dApp applications has extended wallet and dApp interactions beyond payment scenarios. Decentralized applications have become more powerful, involving interactions like smart contract calls, various signature scenarios, and the emergence of decentralized identities (DID), increasing the complexity and diversity of concepts, which has confused users. Currently, specific Web3 applications are still not widely adopted.

In June 2024, Solana released the new Action protocol, greatly simplifying the interaction process between wallets and dApps by removing the Connect Wallet step. It improved usability in scenarios such as payments, airdrop claims, Minting NFTs, obtaining Meme Coins, and interacting with DEXs.

Now, in July 2024, the Bitcoin Action protocol has officially arrived. This new protocol has made appropriate improvements based on the Solana Action process. Unlike Solana, Bitcoin uses the Partially Signed Bitcoin Transaction (PSBT) format and supports the excellent asset issuance NOTE protocol, bringing a convenient interaction experience to Bitcoin users. Receiving and sending BTC, NOTE Tokens, claiming airdrops of the NOTE protocol, Minting NFTs, and purchasing digital assets on the DEX UtxoExchange have become very simple. The new technology allows developers to create new products and applications on Bitcoin, bringing new wealth effects to users.

The complete protocol, Wallet, and open-source sample code will be publicly available soon.

https://noteprotocol.org/assets/images/action-sample-1eee194a85de3f89c6b8f65dce19ccf2.png

In just six months, we have grown from Zero to One.  four wallets, three DEXs, a blockchain explorer, and data services. Thanks to all the contributors. welcome more developers to join in. Let's bring blockchain tech into everyone around the world.

https://noteprotocol.org/docs/community/

This PR does not involve token issuance. It is merely a technical protocol that anyone can use to issue their own tokens based on Bitcoin smart contracts.

Since its inception, Bitcoin has undergone countless technological innovations. The emergence of the NOTE Protocol marks a significant milestone in Bitcoin's history. After six months of meticulous protocol and ecosystem development, the NOTE Protocol is now officially available to the global audience. Our vision aligns with Bitcoin's: to provide a peer-to-peer digital currency for 6 billion people worldwide.

1. Introduction to the NOTE Protocol
The NOTE Protocol is a digital asset issuance protocol based on the Bitcoin UTXO model, designed to develop blockchain products that can impact over 6 billion people worldwide. Unlike other protocols, the NOTE Protocol is genuinely built on Bitcoin's UTXO model. It uses the sCrypt smart contract language, compatible with TypeScript, and compiles to native Bitcoin opcodes. The protocol is Turing complete and supports powerful features such as Oracle integration. The NOTE Protocol also supports on-chain multi-signature, MAST, and the Lightning Network while providing an off-chain environment with state inheritance functionality.

2. Unique Advantages of the NOTE Protocol
Unlike protocols such as Ordinals and Atomicals, all operations in the NOTE Protocol are cryptographically based, with Bitcoin miners ensuring asset ownership. The transaction costs are incredibly low, eliminating the need for dual transactions like other protocols. More importantly, the NOTE Protocol supports smart contracts, with its first example contract implementing functionalities such as Bitwork mining and time-decaying mining rewards. This opens up new possibilities beyond Ethereum's EVM smart contracts, leveraging Bitcoin's UTXO model for efficient concurrency and maximum consensus, offering new choices for all blockchain developers. The sCrypt team provides a comprehensive development, compilation, and testing environment, making the development process revolutionary in terms of learning curve, environment setup, fair launch, and complex functionality implementation.

3. Contributing Teams
The NOTE Protocol is an open-source, VC-free geek protocol, licensed under MIT, with community contributions. The initial core contributing team hails from Tokyo, Japan, with extensive experience in blockchain technology. They have developed products like the multi-chain Ethereum EVM wallet Wallet3.io, the Bitcoin UTXO wallet ChainBow.io, a licensed Japanese Bitcoin exchange, an award-winning Web3 project by Japan's Digital Minister, an early DeFi prototype from 2018, blockchain data services, and blockchain explorers. Additionally, numerous experts have contributed Python and Go versions of open-source wallets, along with browser plugin wallets and a trading marketplace from the NoteMarket team.

4. Technical Details
The NOTE Protocol employs an innovative approach to manage Bitcoin transactions and assets. In traditional Bitcoin transactions, the input unlocks old UTXOs and generates new UTXOs. In the NOTE Protocol, the transaction output is viewed as a user account, represented by the transaction output script hash, offering strong privacy. Asset types and amounts derive from transaction inputs, simplifying asset tracking and enhancing privacy.

Unlike Ordinals and Atomicals, which use P2TR (Taproot) to add inaccessible script areas, the NOTE Protocol allows direct operation on unlock data via opcodes, increasing data usability. Additionally, the NOTE Protocol can be implemented via P2SH, P2WSH, and other methods, enhancing flexibility and cross-chain capability.

The off-chain smart contract environment is based on the unaltered first version of BVM from Satoshi Nakamoto, sourced from the Bitcore core codebase, and has been running stably for over a decade. The NOTE Protocol provides multiple runtime variables, including asset issuance quantities, current block height, block time, transaction inputs and outputs, and transaction initiator accounts. Previous transaction variables can be inherited and accessed by subsequent transactions, facilitating state transfer and validation, laying the technical foundation for new DeFi models based on the UTXO model.

5. Smart Contracts and Future Prospects
The NOTE Protocol has released multiple N20 asset issuance smart contracts on GitHub, showcasing its capability to execute complex logic on the Bitcoin network. Developers can create smart contracts for real-world applications like AI problem-solving bounties, leveraging Bitcoin's vast user base and strong consensus to demonstrate the practicality and innovation of their products. The NOTE Protocol is also developing and refining N721 NFT asset issuance and Alias DID protocols.

Designed with foresight for high-performance blockchain products, the NOTE Protocol enables asset transfer across chains without bridges, greatly expanding future possibilities.

6. Conclusion
The NOTE Protocol represents a crucial advancement in extending Bitcoin's functionality to include smart contracts. Its key features include:

Smart Contract Support: Expands Bitcoin's application range, supporting complex logic and transaction types.
UTXO Model: Leverages Bitcoin's security and efficiency.
Cross-Chain Capability: Supports asset transfers between different UTXO chains.
Real-World Applications: Employs advanced cryptographic techniques to support complex scenarios.
Low Cost and High Efficiency: Optimizes data storage to reduce transaction costs.
Open Source and Community-Driven: Emphasizes open-source principles, promoting transparency and trustworthiness.
As the NOTE Protocol evolves, we can anticipate more innovative applications, enhancing user experiences while adhering to Bitcoin's core values.

NOTE Protocol
Website: https://noteprotocol.org
X: https://twitter.com/NoteProtocol
GitHub: https://github.com/NoteProtocol

Thank you very much. I am launching the testnet4 docker container in live.
Great work!

🔴 [Live] The Note block explorer is currently syncing with the BTC Testnet4. We've throttled the speed to one block per second so you can observe this process in real-time.
Check it out here: testnet4.noteprotocol.org

And For the main network explorer.noteprotocol.org

this is the begin of new world when u skip it

Just a notification


The pre-sales URL: https://cercle.sg
Date: 2019/10/21 10:00 GMT/UTC+8 Singapore Timezone ~ 2019/10/24 10:00 GMT/UTC+8 Singapore Timezone
Open official site by DApp Ethereum Wallet like imToken, Trust, Go-Wallet, Alpha Wallet, Chrome with Meta Mask, and others
The price of the CSS token during pre-sales: 1 CSS = 0.08 USD equal ETH

The company develop the product, wallet and O2O platform, and published 07/2019 month.
Company Site: https://chainbow.io/
Product Site(Japanese): https://www.cercle.app/
Cercle Foundation Site: https://www.cercle.sg

All information is public and under law. include company reg id Japan and Singapore

Just a notification


The pre-sales URL: https://cercle.sg
Date: 2019/10/21 10:00 GMT/UTC+8 Singapore Timezone ~ 2019/10/24 10:00 GMT/UTC+8 Singapore Timezone
Open official site by DApp Ethereum Wallet like imToken, Trust, Go-Wallet, Alpha Wallet, Chrome with Meta Mask, and others
The price of the CSS token during pre-sales: 1 CSS = 0.08 USD equal ETH

The product site is https://cercle.app (Japanese)
Main market is Japan, Asia and EU

Reading a ANN

https://bitcointalk.org/index.php?topic=5192773.msg52761913#msg52761913

Do you want hold it?

Reading a ANN

https://bitcointalk.org/index.php?topic=5192773.msg52761913#msg52761913

Do you want hold it?

Social Profiles

GitHub : https://github.com/chainbow


Telegram: https://t.me/cercle_foundation


Facebook: https://www.facebook.com/CercleFoundation/


Twitter: https://twitter.com/cercle_fund


Whitepaper: https://cercle.sg/files/cercle_sto_en.pdf

Pre-Sales Information
Before listing in the above exchanges, the Cercle Foundation Singapore carry out a pre-sales by its official site.

The pre-sales URL: https://cercle.sg
Date: 2019/10/21 10:00 GMT/UTC+8 Singapore Timezone ~ 2019/10/24 10:00 GMT/UTC+8 Singapore Timezone
Open official site by DApp Ethereum Wallet like imToken, Trust, Go-Wallet, Alpha Wallet, Chrome with Meta Mask, and others
The price of the CSS token during pre-sales: 1 CSS = 0.08 USD equal ETH



Token name: CSS (Cercle Stock Service)
Official Site: https://cercle.sg

What makes CSS different?
CSS is the world’s first real entity O2O enterprise platform token based and issued on the STO innovation model BDR. The value of CSS is solidly backed by the sustainable revenue of the O2O platform - Cercle, which is provided by ChainBow Co., Ltd..
CSS is the equity token of the company. It’s totally different with the coins of public chains which makes money mainly by speculation.
1 CSS means 1 stock share of ChainBow Co., Ltd. So CSS holders are also the stockholders of the company.

Issuer	Cercle Foundation Singapore
Issuance Token	CSS
Issuance Amount	60,000,000 CSS
Token Price	1 CSS = 0.1 USD
Repurchase and Gift	The issuer will repurchase CSS with earnings after tax of ChainBow Co., Ltd. until 40% of CSS remains. Afterwards the issuer will airdrop USDT or equal tokens to CSS holders.
Exit	If ChainBow Co., Ltd. is listed or M&A, the issuer will repurchase all CSS with earnings after tax and exit the project.

Who is ChainBow Co., Ltd.?
ChainBow Co., Ltd. is a fast-growing Internet company registered in Japan.

What is Cercle O2O platform?
The company ChainBow Co., Ltd. created an O2O platform called “Cercle”, which provides loyalty points, coupons, reservation service and payment service to connect physical merchants and Internet consumers.
The platform has built-in aggregated payment functions of Apple Pay, Google Pay, credit cards, Union Pay, WeChat Pay and Alipay, etc., and cryptocurrency payment such as Bitcoin as well.
https://cercle.sg/img/arch.jpg

At present, there are a large number of restaurants, coffee shops, Karaok, hot spring hotels, retails and other physical merchants as the customers of the Cercle platform.

https://cercle.sg/img/cases.jpg


Why O2O is rising in Japan?
The reason why O2O has not been popular in Japan so far is that smartphone payments were not so widespread. The online payments could not be made conveniently, so the online services could not be provided, causing that the consumers could not be guided to offline merchants. There was a gap between consumers and merchants because of the lack of online payment services.

Smartphone payment methods are becoming prevail through the promotion of a “cashless society” where the Japanese government has put considerable effort. If the walls of smartphone payments that have been packed up to now is broken down, more and more online services will be able to connected to offline merchants and consumers so that the O2O business will have a bright future in Japan.


Why Blockchain in the ‘Cercle’ O2O platform?
(1) Blockchain is a reliable infrastructure
Merchants can issue their own loyalty points. Loyalty points are assets. All point assets exchanges can be tracked and the data cannot be tampered with Blockchain technology. And the privacy of consumers can be well protected by Blockchain.

(2) Laws and regulations
In Japan, due to the tax law reforms in 2015 and 2016, the retention period for companies’ ledger data has been extended to 10 fiscal years since April 1, 2018. Using Blockchain the ledger data can be stored forever theoretically compared to centralized services.

(3) Cryptocurrency payment
Besides payment in fiat, payments in cryptocurrencies will be prevailing and will be an important step toward the Japanese government's “cashless society” effort. ChainBow Co., Ltd. with its ‘Cercle’ O2O platform is the pioneer of this area in Japan.


Why does CSS token value increase?
ChainBow Co., Ltd. is expanding the O2O platform “Cercle” very fast in Japan now and the company has a solid revenue.
The company has a powerful multiple business agent layer model for sure that the business agents have excellent revenue too according to the service fees they got from their merchant clients.


Obligation of business agents
Business agents need to:
(1) hold at least 10,000 CSS.
(2) expand “Cercle” O2O platform to merchants.
(3) introduce other business agents.

Reward to business agents
Profit to be distributed: 50% of the service fee paid by the merchants obtained by the business agents.

For the “Profit to be distributed”, the system automatically calculate the reward percentages and rewards the above 3 layers of business agents including himself/herself. The multiple business agent layer model plays an important part in the expansion of the company’s revenue.

Level	Reward
Oneself	50%
1	20%
2	15%
3	5%

The issuer, Cercle Foundation Singapore will repurchase CSS with earnings after tax of ChainBow Co., Ltd. until 40% of CSS remains. Afterwards the issuer will airdrop USDT to CSS holders.

ChainBow Co., Ltd. is expected to become a unicorn company with annual profit of 100 million USD and market capitalization of over 1 billion USD over the next three years.

Listing Date On Exchanges
Listing date: 24th, October 2019
Exchanges:
www.biup.io
www.bitsg.com
www.zbm.com
www.yifei.pro

The company develop the product, wallet and O2O platform from 2018, and published 07/2019 month.
Company Site: https://chainbow.io/
Product Site(Japanese): https://www.cercle.app/
Cercle Foundation Site: https://www.cercle.sg

All information is public and under law. include company reg id Japan and Singapore