Each time data/content is logged or sent it is referred to as a message, Catenis returns a unique global identifier called the Message-ID for each message. This Message ID is used to reference data logged or transmitted across the system. This Message ID is directly associated with the Bitcoin transaction ID that was used to secure the message. The message ID can be used to return the message content or the message container (the location where the actual message is stored). The container will indicate if the message content was stored directly on the bitcoin transaction or in the IPFS decentralized storage.