Anti tampering features to protect Splunk logs themselves?

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Does Splunk provide measures protecting against / detecting the tampering of the Splunk logs/data?
The only thing I could find are the hash values for integrity:

For example, a malicious administrator could add, change, remove or reorder events afterwards.
I search for techniques related to tamper-evident logging like forward integrity (by key evolution), hash chains, Merkle tree and linking hash values to public media (blockchain, ...).

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The Data Integrity feature is all Splunk offers to detect tampering with data. Note that Splunk logs are also indexed and, therefore, protected by Data Integrity.

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