The first step is to extract the correct Plasm address of a deployed contract. The correct contract address looks like the following.
The address should be alphabetical and correctly imported into Address Book.
If you can see a positive balance, this means that your contract was successfully deployed.
The second step is to check whether the deployed contract is really a smart contract or not.
For this purpose, let's use a smart contract pallet like below.
contractInfoOf and it shows a lot of information about the deployed smart contract like a codeHash, deployed block, etc. If this information is not empty then the given address is a really smart contract deployed on Plasm or Dusty.