[1] On 18 February 2022, Flamengo loaned Otávio to Série B club Sampaio Corrêa until the end of the 2022 season.
[2] However, he failed to break into the team, making just one appearance in the state championship and, in July 2022, the loan was cancelled and Otávio returned to Flamengo.
[3] On 31 January 2023, Flamengo sent Otávio on loan to Portuguese Primeira Liga club Famalicão, until the end of the 2022–23 season.
[6] On 31 January 2024, Otávio moved to Portuguese giants Porto, signing a four-and-a-half-year contract.
[8] On 17 February 2024, Otávio made his debut for Porto, starting and playing the full 90 minutes in a 2–0 league victory over Estrela da Amadora at the Estádio do Dragão.