Systems and methods are disclosed for blockchain-based payment transactions, alerts, and dispute settlement, using a blockchain interface server. One method includes: receiving a transaction identifier for a series of transaction events stored in a shared ledger; and performing iterations of: identifying a new transaction event in the series of transaction events; presenting the new transaction event to participants of the transaction; determining whether the identified new transaction event indicates a dispute of one or more attributes of the transaction by a transaction participant; if the identified new transaction event indicates a dispute, receiving a proposed change to the disputed attribute of the transaction by the participant of the transaction; presenting the indication of the dispute and the proposed change to other participants; prompting the other participants to respond to the indication; executing a dispute settlement process to determine revised attributes of the transaction; and presenting the revised attributes.