Underlying Work vs Arrangement vs Master

The underlying work is the original composition. An arrangement is the creative treatment embodied in this version. The master is the specific sound recording. Each may have different parties, control, territories, evidence, and clearance requirements.

Public-domain underlying-work status removes false expectations for modern composition splits and publisher administration on that historical work. It does not establish control of the arrangement or master. Document and review every applicable layer.

For example, a historical composition may be public domain in the United States, a contemporary arranger may control the new arrangement, and a label may own the recorded master. The pitch should describe all three facts without saying the entire track is public domain. If the underlying work is licensed third-party material instead, normal composition claimants, publisher administration, and agreement review may still apply. If no trustworthy conclusion is available, choose Unknown or Needs Review rather than guessing. Territories can differ across every layer, so an underlying-work conclusion cannot silently supply the arrangement or master territory. CatalogIQOS keeps these facts separate in storage, imports, exports, Audit, and rights-chain summaries.