Smart contracts on Ethereum are fully self contained and any information or access to off-chain data is restricted. Tellor solves this problem by creating a system where parties can request the value of an off-chain data point (e.g. ETH/USD) and miners compete to add this value to an on-chain data bank, accessible by all Ethereum smart contracts. Inputs to a data series are secured by a network of staked miners. The main Tellor smart contract creates a time series of each requested data series and aims to become the standard source of high value data for decentralized applications. This oracle, “Tellor”, utilizes similar incentive mechanisms to other cryptocurrency systems through the issuance of Tellor’s token, Tributes, that are used to request a particular data series from miners.
Tierion is launching a universal platform for data verification that operates at massive scale. Businesses safeguard and notarize important documents such as property titles and contracts to ensure anyone can prove their veracity. Surprisingly, there isn’t a universal equivalent for safeguarding digital data. Companies in healthcare, insurance, and financial services are trusted with safeguarding huge volumes of critical data. Proving the authenticity of information within these industries is currently cumbersome, expensive, and in many cases impossible.