As of now, you cannot buy Veritaseum on Coinbase. Veritaseum is a decentralized platform that allows for peer-to-peer finance. It allows for the creation of smart contracts and decentralized applications. The native currency of the Veritaseum platform is called VERI.
Coinbase is a digital asset exchange company headquartered in San Francisco, California. They broker exchanges of Bitcoin, Ethereum, Litecoin and other digital assets with fiat currencies in 32 countries, and bitcoin transactions and storage in 190 countries worldwide.