Blockchain is one of the emerging technologies with the potential to disrupt
many application domains. Cloud is an on-demand service paradigm facilitating
the availability of shared resources for data storage and computation. In
recent years, the integration of blockchain and cloud has received significant
attention for ensuring efficiency, transparency, security and even for offering
better cloud services in the form of novel service models. In order to exploit
the full potential of blockchain-cloud integration, it is essential to have a
clear understanding on the existing works within this domain. To facilitate
this, there have been several survey papers, however, none of them covers the
aspect of blockchain-cloud integration from a service-oriented perspective.
This paper aims to fulfil this gap by providing a service oriented review of
blockchain-cloud integration. Indeed, in this survey, we explore different
service models into which blockchain has been integrated. For each service
model, we review the existing works and present a comparative analysis so as to
offer a clear and concise view in each category.