Neil Bantleman, the Canadian teacher sentenced to 10 years in Indonesia for child sex abuse, is planning to appeal his conviction, his wife says.

Tracy Bantleman said her husband is exhausted by the four-month trial, but told the court Thursday he did not accept its decision and would appeal to the Supreme Court.

"Like I've said before, my husband is innocent. He always has been, he always will be. These claims are absolutely baseless and ridiculous and absurd," Tracy Bantleman told CTV News from Jakarta.

Bantleman said she was "absolutely, completely, utterly disheartened by the decision."

Even though she anticipated the verdict, based on what she had been told of the court’s high conviction rate, she was still stunned by how unfair the process appeared to be.

The defence was not allowed to present any evidence or witnesses, she said, suggesting that her husband was convicted solely on the basis of "stories and allegations and opinions of police."

After the verdict came down, Bantleman's brother, Guy, said he too wasn't surprised by the ruling, given how the trial had progressed.

"It did seem like it was moving in this direction," Guy Bantleman told CTV's Canada AM from his home in Burlington, Ont.

Neil Bantleman, 45, and teaching assistant Ferdinand Tjiong were taken into custody in July and charged with abusing three boys at the Jakarta Intercultural School in Indonesia. Both men have long maintained their innocence.

The pair was arrested three months after five janitors at the school were taken into custody following allegations from the parents of a six-year-old boy at the school who said he had been sexually abused.

The five janitors were sentenced to eight years in prison in December. A sixth suspect died by suicide while in custody, police said.

Guy Bantleman said the investigation into his brother's case was a mess from the beginning and "bounced back and forth between the police and prosecutor" for four months.

"It's based on allegations with no material evidence, no medical evidence, at all," he said.

He added the trial was mishandled and appeared to favour the prosecution.

"The judge basically threw out every bit of evidence, every witness the defence had provided and really focused on just the allegations and their so-called expert witnesses, who kind of framed up the case in general," he said.

Neil Bantleman moved to Indonesia four years ago with his wife, Tracy Bantleman. She also taught at the school, which is attended by the children of foreign diplomats and Indonesia's elite.

Guy Bantleman says there are many teachers from abroad working in Indonesia who have been watching this case and offering their support.

"The international teaching community is a very tight-knit group. Today, we had (people from) over 70 countries following our Facebook feed overnight," he said.

"…This is not just about Neil as an individual; it's also about the teaching community and how easily they are targets for things like this."