The front man is facing 29 years in jail and 6 years on license. Police believe there are more victims and will continue their nvestigation.
Documents obtained by an investigative reporter claim police were first made aware of abuse allegations against Ian Watkins 2008.
Rock singer Ian Watkins has pleaded guilty to a string of sex offences, including two charges of attempting to rape a baby.
The disgraced rock star and former Lostprophets singer Ian Watkins lodged an application for permission to appeal. Watkins was handed a 35-year sentence for a string of child sex offences, including a custodial term of 29 years and a further six on licence.
Watkins, 36, was sentenced at Cardiff Crown Court last month.
He confessed to 13 offences and was described as a committed and determined paedophile.
His two accomplices, Woman A and Woman B, were jailed for 14 years and 16 years respectively.
Former Lostprophets singer Ian Watkins, who was given a 35-year sentence for a string of child sex offences, has lodged an application for permission to appeal, the Judicial Office has confirmed.
Singer Ian Watkins could be at risk of attack from fellow inmates inside Wakefield prison, the general secretary of the Prison Officers Association said.
Stressing the singer will be treated no differently than others, Glyn Travis said:
It is likely he will be at serious risk of self-harming and suicide.
Like any new prisoner convicted of a serious offence and handed a lengthy custodial term, he would present some challenges to ensure his safety.
He will be checked over by doctors and nurses and a plan will be put in place for any issues relating so any drug problems he still may have. But the Prison Service will deal with him like they would anyone else.
Mr Travis said the lead singer's celebrity status could mean he becomes a target by an inmate "looking to make a name for themselves." He said:
Prison staff will be aware of this and assess these risks accordingly.
Paedophile singer Ian Watkins started his 29-year-custodial jail sentence inside a prison that is home to some of Britain's most notorious sex offenders and killers.
While on remand he was at HMP Parc in Bridgend, but his permanent home will now be HMP Wakefield in Yorkshire, the largest high security prison in western Europe and nicknamed "Monster Mansion."
Other prisoners serving substantial sentences at the facility include notorious paedophiles such as April Jones' killer Mark Bridger and Steven Barker who murdered 17-month old Peter Connelly - also known as Baby P.
The prison was also where serial killer Dr Harold Shipman hanged himself in 2004.
The family of paedophile Ian Watkins will "not totally cast him aside", the singer's stepdad John Davies said, according to The Daily Mail.
Davies, a Baptist Minister, told the paper that while he could "cheerfully spend an hour knocking [Watkins] around a cell," the family are hoping the convicted child abuser can be rehabilitated.
He said: "The police said he wouldn’t think twice about hanging you or anyone else out to dry, why are you bothering, why would you want to stand by him?
"‘I said, because he is my stepson. Because it gives me an opportunity to seek some healing in a very broken family.’"
Mr Davies said his "heart ached" for his wife, who he said is seriously unwell after a kidney transplant.
"Ian had a very strong relationship with his mother. It is a very deep bond," he said. "My heart aches for any individual who has been drawn into this and been affected by it. And only time will tell who those victims are."
The search for further victims of "determined and depraved" paedophile Ian Watkins will continue, South Wales police said.
Other investigations in the United States and Germany are ongoing, and police in Wales are currently following up on leads from the public. Detective Chief Inspector Peter Doyle, speaking after sentencing said:
"There are also investigations being conducted by other police forces around the world, including Germany and the United States. Above all, this investigation has been focused on the protection of children and my thoughts today remain with those victims."
The 21-year-old woman who allowed Ian Watkins to abuse her baby committed the "greatest betrayal a mother could", a judge said. Known only as "mother A" to protect the identity of her child, the woman was an obsessed fan almost half Watkins' age when she first met the singer in 2008.
They began a sexual relationship and Watkins filmed their sex sessions when she was just 16. Sentencing her to 14 years in prison, the judge said:
"That you were manipulated by Watkins may be obvious, but you were a mother. A mother naturally loves, protects, shields, nurtures and cherishes.
"Your infant would have trusted you implicitly. You totally betrayed that trust. Could there be a greater betrayal?"
Her barrister dispute Watkins' claim that she was equally responsible, saying she had been corrupted by the rockstar. He said:
"He darkened her world with drugs and even injected her with heroin. She sacrificed her own moral compass so she could sustain a relationship with a man she was obsessed with.
"She was a girl doing her A-levels. He was in the limelight and a rock star. She was vulnerable and exploited."
A laptop seized from the home of Ian Watkins in Pontypridd, South Wales, was unlocked by an expert from the intelligence agency GCHQ. Watkins, who used a sick reference to his own perversion as his password, and was also found to have encrypted files within an encrypted hard drive.
Watkins hid his stash of images on computer equipment with a storage capacity five times the size of that used by the South Wales Police force, with 2,862 sworn officers and 1,631 support staff, according to detectives. Detective Inspector Peter Doyle said:
His computer equipment contained 27 terabytes of storage space, which is five times the size of the South Wales Police's storage.
If you need 27 terabytes you are into that kind of world.
Detective Daniel Minto from South Wales Police was one of the officers who trawled through the vast amount of data found on Ian Watkins' computer. He said the sheer scale of the operation was the biggest challenge and described Watkins' as a 'technically switched-on individual.'