A big upgrade just landed for Web3 and real-world data. Locale Network and @MSocietyLabs have open-sourced L{CORE}. This is the first decentralized system that allows IoT devices to prove their data on-chain. This means sensor data can now be trusted without relying on centralized platforms. The system is built in partnership with @ReclaimProtocol and @CartesiProject, and it brings trustless device data verification directly to Arbitrum. L{CORE is the main infrastructure behind Locale Network’s City Chains. These are community-built Layer 3 networks designed for DePIN, ReFi, and real-world assets. They focus on real use cases and community ownership. The goal is simple. Devices are verified at the source. Data is recorded on-chain. Control belongs to the community, not a central company. Today, most IoT systems work the same way. A device reads data, sends it to a cloud server, and an app later shows the result. In this setup, users are not really trusting the device. They are trusting the platform that stores and controls the data. 🔹That is the problem L{CORE solves. Once data leaves a device, it is very hard to prove where it came from or if it was changed. Anyone can send numbers to an API. Very few systems can prove that a real device produced the data at a specific time without a central authority. 🔸L{CORE brings that missing proof. Instead of creating a new blockchain just for IoT, this system works directly on Arbitrum. No new chain. No bridges. Builders can simply connect their devices and start building. Each device gets a unique identity. Devices sign their data using the same cryptography used by Ethereum. The data is encrypted and submitted on Arbitrum. Cartesi then verifies the data in a secure and deterministic environment. 🔹Anyone can replay and verify the data. No trust is required. This is not a mobile app or an API wrapper. It uses real embedded software that runs directly on hardware like Raspberry Pi, Arduino, and other IoT devices. The project is funded and supported by the @Arbitrum DAO. It can be self-hosted or run in the cloud. There are no protocol fees, only gas fees. This unlocks real-world use cases that need trusted data. Real-world asset lending with live collateral data. Verified carbon tracking. Energy meters with on-chain proof. Smart city systems that people can actually trust. This is how real-world infrastructure moves on-chain.