Joshua lost his IBF, WBA and WBO titles on June 1 in one of the biggest upsets in the history of the division.
Joshua was down twice in the third round and twice more in the seventh.
In an announcement on Twitter, Wilder says he has sign a deal to face Ortiz once more following a bruising first battle in March 2018.
ESPN reported Jarrell Miller had tested positive for the banned substance GW1516, which boosts endurance and helps athletes burn fat.
There were 609 losers and 133 gainers, while 285 counters remained unchanged, 874 untraded and 23 others suspended.
Wilder had Fury on the canvas twice, including a spectacular final round knockdown, but was unable to get the knockout victory he had promised to deliver at the Staples Center.
Heavyweight world champion Deontay Wilder apologised after unleashing a punch that knocked down the mascot on an ESPN programme.
Tyson told reporters that he would be a rarity if he boxed today.
Deontay Wilder and Tyson Fury will face off on December 1.
Although Anthony Joshua is willing to take on anyone in his next fight, he would most prefer to face Deontay Wilder.
A previously close contest turned in Joshua's favour decisively when he sent the Russian crashing to the canvas with a straight right hand and left hook.
Promoters Haymon Boxing said that Tyson Fury will challenge Deontay Wilder for Wilder's World Boxing Council heavyweight title on December 1.
Anthony Joshua expects his world championship title defence against Alexander Povetkin to be his toughest fight since he beat Wladimir Klitschko.
Ahead of Tyson Fury's bout against Francesco Pianeta, Fury dismissed the prospect of losing a potential future bout against Deontay Wilder.
Tony Yoka's appeal against a one-year ban for doping violations was rejected.
Anthony Joshua will defend his World Boxing Association, World Boxing Organization, and International Boxing Federation heavyweight titles against Alexander Povetkin.
In the two fights, Anthony Joshua is expected to face off against Alexander Povetkin and Deontay Wilder respectively.
Anthony Joshua is now required to fight Alexander Povetkin to remain WBA world heavyweight champion.
David Haye will retire with a career record of 28 wins and four losses.
Deontay Wilder's management team believe that their client will soon be able to fight Anthony Joshua.
The fight between Kubrat Pulev and Dillian Whyte will likely take place at the Vasil Levski National Stadium.
Anthony Joshua considers Joseph Parker to be his main threat in his defense of his heavyweight titles.