@ Vaishaliji,
The marriage certificate pertaining to his second marriage produced in Supreme Court is sufficient proof of second marriage. You see the date of marriage on the certificate and if it is within 90 days from the date of the decree of the trial court, then this marriage is illegal and void ab-initio. You said that it is within 30 days, then there should be no hesitation to conclude that it is illegal marriage. Every second marriage while subsistence of first marriage is void. That does not mean the person who commits second marriage can come out of the clutches of Section 494 of IPC (Bigamy) on the ground that second marriage is void. Then Section 494 will become redundant. This question came before the various High Courts including the Apex court and the Supreme Court held that despite the second marriage being void, the person who undertakes such marriage is guilty of bigamy and can be convicted. There are several instances, where people were put behind the bars for bigamy and also lost their government employment as it is contrary to service conditions. The guilty shall be punished in such a way.
The courts are sympathetic towards women and their problems and their status in the society. The courts are also sensitive towards the illegitimate wife and her status in the society. So, where the couple are involved in prolonged matrimonial battles and are not living together for the years together and there is thin scope for reconciliation and in such cases, if husband gets divorce decree and immediately marries some one else within the appeal period, the appellate courts consider the entire issue in different angle. Some times they show sympathy toward the wife of second marriage (even though she is not a party before the court) as the first marriage appears to be irretrivably broken down. Though the husband is not entitled to divorce decree purely on the basis of legal grounds, keeping in view of the pitiable condition the second wife will face in future if the divorce decree is not confirmed, courts uphold the divorce decree.
Some conniving litigants and at the advise of conniving advocates take such a drastic step that the husband immediately after getting divorce decree in trial court, without waiting for the appeal period, goes for second marriage with registration and produce the same in appellate court and seeks the confirmation of divorce decree. That foul play often some people play.
In your case also the same thing has been played by your husband. You see how many supporters he collected on this forum for his criminal offence without putting his version. But the courts dealt shrewedly in your case and did not play game according to his tune and ultimately gave verdict in your favour.
So decide yourself what you want to do.