After reviewing the C-Span video of the Joint Session of Congress, it is confirmed that Vice President and President of the Senate Michael R. Pence did indeed continue to violate the 12th Amendment on numerous occasions by letting someone else, apart from himself as explicitly stated in this Amendment, open the Certificates of Vote for numerous states.

AMENDMENT XII :

..." -- the President of the Senate shall, in the presence of the Senate and House of Representatives, open all the certificates and the votes shall then be counted;"...

( https://constitution.congress.gov/constitution/amendment-12/ )

OUTLAW PENCE CAUGHT HERE:

At 8:55 of C-span video Vice President and President of the Senate Michael R. Pence starts announcing Arkansas electoral delegates without himself opening the sealed document.
   Breaking the 12th Amendment of the Constitution of the United States of America!

9:51 of C-span broadcast, Pence is handed an already opened Certificate from California, again Pence is breaking the law as stated in the U.S. Constitution.

At 10:44 into the video, Vice President Pence again Failed to open the Certificate from Colorado, breaking the Constitution again.

11:30 Pence - Connecticut - law breaking.

12:27 Pence - Delaware - law breaking.

13:13   Pence - District of Columbia - law breaking.

At 14:00 Pence - Florida - law breaking.

At 18:47 Pence - Illinois - law breaking.

Etc.

( https://www.c-span.org/video/?507663-4/joint-session-counting-electoral-college-ballots )