Re: "If you don't have it in writing then it does not exist !!!"
"No, copyright actually doesn't require a written statement or registration."
It does not strictly require it as copyright is applicable on creation of the 'new' work BUT there are registration services such as UKCS that you can register your copyright with for 'further' protection. See https://www.copyrightservice.co.uk/services
As proving who has copyright can often be 'difficult' such registration is useful to prove via an independant organisation that you have copyright and applied first for registration of such copyright.
Such deconstruction does somewhat ruin the 'joke' but with the like of 'The Googleplex' and others default copyright is minimal protection when US of A courts seem to be driven by how much money you have NOT whether the result is just !!! :)