An example operation may include one or more of storing encrypted IoT data as transactions in a blockchain, the IoT data being captured by one or more edge devices of an IoT network, receiving an identification of an event, and in response, retrieving encrypted IoT transaction data stored in the blockchain which is associated with the event, decrypting, via a blockchain node, the retrieved IoT transaction data associated with the event and generating anonymized data of the event from the decrypted IoT transaction data in which personally identifiable information is anonymized, and outputting information concerning the anonymized data of the event to one or more of a user device and a display device.