Integrity protected container, analogue to ASN.1-based CMS DigestedData.
=> CMS

Stored in a file, it should begin with "cm/hashed" [encoding/MAGIC].

    hashed {{field . {map} {of type bin} >0}}

It is just a single map of algorithm identifiers with hashes.

Hashed data is provided any way you wish. Consider using "prehash"
structure similarly as [cm/signed/] does:

    prehash {
        {field . {map}}
        {field t {str} =prehash}
        {field algos {set} >0} {# set of hash algorithm identifiers}
    }

    prehash || BLOB(data) || cm/hashed

        Backlinks:
  0 [cm/]                                                              0
  1 [cm/hashed/blake2b]                     2025-06-09 07:24:59        4
  2 [cm/hashed/blake2b-merkle]              2025-06-09 07:24:59        8
  3 [cm/hashed/blake3]                      2025-06-09 07:24:59        3
  4 [cm/hashed/shake]                       2025-06-09 07:24:59        4
  5 [cm/hashed/shake-merkle]                2025-06-09 07:24:59        4
  6 [cm/hashed/skein512]                    2025-06-09 07:24:59        3
  7 [cm/hashed/streebog]                    2025-06-09 07:24:59        4
  8 [cm/hashed/streebog-merkle]             2025-06-09 07:24:59        2
  9 [cm/hashed/xxh3-128]                    2025-06-09 07:24:59        4