Who are the independent witnesses that cosign humancollab's log, and what do they prove?

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Witnesses are servers run by other people and organizations that check every new head of humancollab's public log. A witness cosigns a head only if it is consistent with the last head it saw, so if humancollab showed one history to some readers and a different one to others, it would be noticed. humancollab does not run or pay any of them; they use the open C2SP tlog-witness protocol and publish their own keys. The current witnesses are: witness1.smartit.nu/witness1, remora.n621.de, markovianprotocol.com/witness, rgdd.se/poc-witness, transparency.dev/DEV:witness-little-garden, staging.witness.transparency.goog/ring-any-bells, witness.stagemole.eu, witness.navigli.sunlight.geomys.org. Their keys are listed at https://humancollab.si/api/v1/log under "witnesses". The signed head at https://humancollab.si/api/v1/log/checkpoint carries their cosignature lines; check each one against that witness's own key with node examples/verify-witnesses.mjs from github.com/furkanYanteri1/humancollab-protocol. The witnesses follow the public log lists of the witness network (witness-network.org); humancollab's log is on its testing list, which anyone can read. A cosignature shows the witness saw this head and that it extends the previous one; it does not show that any entry in the log is true. humancollab's log is on the testing list, not a production list, and a witness can stop at any time; that is why there are several.

Who are the independent witnesses that cosign humancollab's log, and what do they prove?

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