Master Copy
Definition
Preserved authoritative copy within the documented evidence workflow. Preserve the authoritative recording and document acquisition, versions and analysis. Authentication assesses particular claimed histories using suitable technical observations. No single feature proves that a recording was never edited.
- Context
- Recorded evidence
For example, a preserved authoritative recording can remain separate from a listening copy whose format or loudness was changed for presentation.
Distinguish the tested claim, original material and any derivative used for listening or presentation.
Related terms
- Authentication
- The process of establishing that a document is what it purports to be. Under the US FRE Rule 901, the proponent must...
- Cryptographic Hash
- A fixed-length digest produced from a file's bytes by an algorithm such as MD5 (128-bit), SHA-1 (160-bit), or SHA-256 (256-bit). Identical files...
- Processing History
- Record connecting a derivative to its inputs, operations and relevant parameters. A derivative should remain connected to its source files and documented...