Original default bitcoin script Where can I read the original Bitcoin script for verifying the transactions?
Also, who controls the GitHub profile of bitcoin?
Thanks.
Where can I read the original Bitcoin script for verifying the transactions?

You should be able to find the source code on GitHub
e.g. https://github.com/trottier/original-bitcoin but I'd verify that before relying on it for anything important.

who controls the GitHub profile of bitcoin?

Some subset of
https://bitcoin.org/en/development#bitcoin-core-contributors
See https://github.com/bitcoin/bitcoin/blob/master/contrib/verify-commits/trusted-keys

See also:

Is there a list of core Bitcoin committers? (hat tip to Pieter Wuille for pointing this out)