Batch Apex / class not updating records

Hi there, i have a batch class which updates a field(verification status- picklist)  on the custom object. Below is my batch class and i was testing if it would run from developer console but did not get any error nor the fields are updating. Please share your thoughts.

Thanks in advance

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Batch class:

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global class BackgroundCheck implements Database.Batchable<sObject>

{

   global Database.QueryLocator start (Database.BatchableContext bc)

    {

      string query = 'select id,LinkedIn_Profile__c from Trainer_Master__c';

      return Database.getQueryLocator(query);

    }

    global void execute (Database.BatchableContext bc , list<Trainer_Master__c> VarRec)

    {

      for(Trainer_Master__c VarR : VarRec)

      {

         if(VarR.LinkedIn_Profile__c == ' ')

           {

             VarR.Verification_Status__c = 'Details Needed'; 

           }

         else if(VarR.LinkedIn_Profile__c == 'Available' && VarR.Background_Check_Done__c == 'No')

           {

             VarR.Verification_Status__c = 'Non Verified'; 

           }

         else if(VarR.LinkedIn_Profile__c == 'Available' && VarR.Background_Check_Done__c == 'Yes')

           {

             VarR.Verification_Status__c = 'Verified';  

           }        

      }

         update VarRec;

    }

    global void finish (database.batchablecontext bc)

    {

    }

}

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Anonymous  window

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BackgroundCheck VarBC = new BackgroundCheck();

database.executebatch(VarBC);