what the base for this coin, Waves or Ethereum Based, or Tavitt using own Blockchain.
hopefully you, using your own blockchain not based in any platform like Ethereum or Waves, i'm so tired.

As I understand right, Tavitt uses waves blockchain.
if I'm wrong, let me correct
Tavittcoin tokens will implement a dual-blockchain structure.
By implementing this dual-blockchain structure, users will be able to freely move/transfer
to the Ethereum blockchain from the Waves blockchain by using the blockchain composed of Ethereum s smart contract.
If users wish to transfer from the Waves token holder to the Ethereum blockchain,
they should access the web interface that Tavitt manages.
(Planned to be implemented by the end of April 2018)
https://tavittwallet.io/