Value My Property Online Guidance Value Or Fair Market Value Of The Property Or Stamp Duty Value Of Property In Bangalore?

Guidance value or fair market value of the property or Stamp duty value of property in Bangalore? - value my property online

I have an apartment in Bangalore, I want to sell. According to my information, the value of the property value is either a sales or value that the Authority made in assessing the status, the maximum permitted.
My question is: How can I know the value of the authorities of Govt set to my apartment? Is there an online resource that is it?