The transition from physical to digital and cloud media has enabled more personalized music appreciation. However, it is questionable whether the current media adequately supports music's role in constructing self-identity. To investigate this issue, we conducted exploratory interviews, from which we derived that today's digital music service can discourage listeners from exploring, expressing, and reflecting on themselves with music. We presumed that inducing people to curate the music in personal tangible artifacts can resolve the issue, which is why we devised the concept of Artifact Mixtape. We introduced the design and usage of the system and added our hypotheses about how it will contribute to establishing self-identity with music.