ISWC · Musical Work
Variations on an Original Theme in D major, op. 21 no. 1
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The ISWC for “Variations on an Original Theme in D major, op. 21 no. 1” is T-329395054-2. ISWCs are ISO 15707 identifiers managed by CISAC; they identify the underlying song — its melody, lyrics, and arrangement — rather than any single recording. One composition can have many recordings (ISRCs). This work has 11 known recordings (ISRCs) indexed on Credits.fm.
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T-329395054-2 is an International Standard Musical Work Code (ISWC) that uniquely identifies the musical composition “Variations on an Original Theme in D major, op. 21 no. 1”. ISWCs are defined by ISO 15707 and managed by CISAC. Unlike ISRCs which identify recordings, an ISWC identifies the underlying song — the melody, lyrics, and arrangement.
This work has 11 recordings (ISRCs) associated with it. Each recording represents a distinct version — such as the original, a remix, a live performance, or a cover — that shares the same underlying composition.
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