Method, system, and apparatus for storing conversation data of a conversation onto a blockchain network, the conversation data comprising terms of an agreement, the method comprising: receiving audio data of a conversation between two or more participants; creating a transcript of at least some of the audio data; accessing a database comprising a plurality of words or phrases. The method, system, and apparatus are also for obtaining, from the database, predefined one or more words associated with a predefined topic; searching the transcript for the predefined one or more words; filtering the transcript based on the predefined one or more words; and storing the conversation data onto a first block of a blockchain stored on the blockchain network, wherein the conversation data comprises the filtered transcript.