The Professional association and market participants have created a method to help establish the official value of the cryptocurrency. This is required for the payment of taxes and court proceedings, the subject of which is electronic finance. The essence of the method is as follows: for 24 hours, every half minute, the BTC rate is requested from several cryptocurrency exchanges. The received information is analyzed, at the end of 24 hours the average value is fixed and the exchange rate against the ruble and the dollar is calculated. The quotes of other digital currencies that are traded in pairs with BTC are determined in a similar way. The law on digital assets came into force at the beginning of this year, and, according to the adopted document, individuals and legal entities are required to pay taxes on income from the crypto. This method will help them calculate the amount of taxation and pay the required tax. As for legal proceedings, the digital currency is increasingly featured in disputes. Especially after the cryptocurrency is recognized as property that can be sold, bought, given, or inherited. It is also possible to recover it if the company is declared bankrupt or became involved in a corruption case, etc. Therefore, this technique will also be very useful here.