A one-page worksheet to scope a multi-DRM build before you write packaging code or sign a DRM contract: confirm the encrypt-once / license-many model, lock packaging to the cbcs scheme of Common Encryption in CMAF, map the CPIX/SPEKE key handoff between your DRM key provider and packager, list the three license endpoints (Widevine, PlayReady, FairPlay) your players must call, run the cost-shape check that keeps encoding and storage at one times, and choose build vs buy (multi-DRM service / cloud
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