  Massive amounts of multimedia data (i.e., text, audio, video, graphics and
animation) are being generated everyday. Conventionally, multimedia data are
managed by the platforms maintained by multimedia service providers, which are
generally designed using centralised architecture. However, such centralised
architecture may lead to a single point of failure and disputes over royalties
or other rights. It is hard to ensure the data integrity and track fulfilment
of obligations listed on the copyright agreement. To tackle these issues, in
this paper, we present a blockchain-based platform architecture for multimedia
data management. We adopt self-sovereign identity for identity management and
design a multi-level capability-based mechanism for access control. We
implement a proof-of-concept prototype using the proposed approach and evaluate
it using a use case. The results show that the proposed approach is feasible
and has scalable performance.
