"This is got to be..." = "This must be..." or "This has got to be..."?

[Denisius]

"This is got to be..." = "This must be..." or "This has got to be..."?

Today I ran into a sentence that started from the "This is got to be...", so I'd like to know what exactly such word combination means?
Thank you in advance.

 

[Rover_KE]

Re: "This is got to be..." = "This must be..." or "This has got to be..."?

'This is got to be' is ungrammatical.

Your title gives correct alternatives.