A dispute resolution cryptocurrency sidechain system includes a system provider that determines that a transaction amount for a transaction has been received at a first public ledger address on a public ledger from a second public ledger address and, in response, allocates a sidechain address on a dispute resolution sidechain ledger. The system provider then sends, through a network to a payer and a payee involved in the transaction, the sidechain address, and monitors the sidechain address for dispute communications. Based on detecting a first dispute communication that is received at the sidechain address and that is signed using a private key that identifies the payer, the system provider device causes a portion of the transaction amount that was received at the first public ledger address to be sent to the second public ledger address.