Russia has formally responded to the World Anti-Doping Agency after signs of tampering were found in data it handed over regarding past performance-enhancing drug cases.
Russia had until Wednesday to explain to WADA why some of its key evidence was apparently missing or altered.
Sports Minister Pavel Kolobkov says the response address 31 questions and wwere compiled with the help of "independent Russian experts in the field of information technology".
"We are confident we've met all the requirements," he said.
"We're ready to continue co-operating, to put this situation behind us quickly and do everything so that there are no more questions for the Russian side."
Kolobkov didn't say how the apparent tampering was explained.
Talks are planned with "experts and interested parties" before the end of the month ahead of a WADA meeting in November, he said.
WADA said it would analyse the claims "as quickly as practicable".
If it rules there's been yet another Russian cover-up - of data which was supposedly secure in the Russian state's custody - new rules could mean tougher sanctions than ever.
"It will be strict. This is an issue of recidivism, a repeat, and it's about using the same methods again," Russian anti-doping agency CEO Yuri Ganus said recently.
"It's actually a big problem and obviously it's to be expected.
"If the (Russian) sports authorities can't find some answers, and I struggle to imagine what those answers could be, I can envision that the decision will be fairly strict."
The data handover in January in a sealed-off section of the Moscow lab was meant to clear up years of doping cases.
Russia's anti-doping agency, known as RUSADA, was reinstated in return, against protests from some Western athletes.
The head of World Athletics' taskforce for Russia, Rune Andersen, says the data doesn't match an earlier copy WADA obtained from a whistleblower.
Andersen wrote last month that the data shows signs particular athletes' test results were selectively edited, rather than the random changes which could result from a corrupted file.
Tampering would be a breach of trust and could taint the entire data archive so that it's hard to prosecute cases even for athletes whose files appear untouched.
If WADA decides foul play was involved, its first step will likely be to re-suspend RUSADA, which the rules require as a pretext to further sanctions.