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.
VeriCoin (VRC) is a Proof of Stake-Time cryptocurrency. It was previously a Proof-of-Stake cryptocurrency with Proof of Work used to mine coins in the early stage. VeriCoin began work on PoST after the MintPal VRC hack and the subsequent roll back. More information on Proof of Stake-Time can be obtained by reading the whitepaper here. There is no Pre-mine or IPO for VeriCoin. The minimum stake time is at least 8 hours. The one highlight feature of VeriCoin is VeriFund. VeriFund is the answer to ensure stability and growth of VeriCoin. It is used to counter the inflationary effect of the proof of stake. When the supply increases, VeriFund will purchase liquid supply of VeriCoin to ensure growth and stability of the coin's value. More info about VeriFund can be found at http://vericoin.info/verifund.html Another key feature of VeriCoin is VeriSMS. VeriSMS is an SMS wallet system that gives your phone capability to access the VeriCoin network. Some of the available commands include 'Balance', 'setpassword', and 'SEND'. More information about VeriSMS can be found at http://vericoin.info/text.html