Is the word encontrado the same in Brazilian and European Portuguese?

Yes

The spelling, meaning, and grammar of "encontrado" are identical in both Brazilian and Continental Portuguese. The only difference is pronunciation. In Brazilian Portuguese, the vowels are typically more "open" and clearly articulated. In Continental Portuguese, unstressed vowels are often reduced, shortened, or "swallowed," making the word sound more closed or consonant-heavy.

Brazilian Portuguese Examples

1. O cachorro foi encontrado na rua. (The dog was found on the street.)
2. O objeto perdido foi encontrado. (The lost object was found.)
3. O caminho encontrado era difícil. (The path found was difficult.)
4. O tesouro foi encontrado no fundo do mar. (The treasure was found at the bottom of the sea.)
5. O menino foi encontrado brincando no parque. (The boy was found playing in the park.)

Continental Portuguese Examples

1. O cão foi encontrado na rua. (The dog was found on the street.)
2. O objeto perdido foi encontrado. (The lost object was found.)
3. O caminho encontrado era difícil. (The path found was difficult.)
4. O tesouro foi encontrado no fundo do mar. (The treasure was found at the bottom of the sea.)
5. O rapaz foi encontrado a brincar no parque. (The boy was found playing in the park.)