Time-stamp services produce time-stamp tokens, which are data structures containing a verifiable cryptographic binding between a data item's representation and a time-value.
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ISO/IEC 18014-3:2004 describes time-stamping services producing linked tokens, that is, tokens that are cryptographically bound to other tokens produced by these time-stamping services.
Non-C data type manipulation API—provides access to all of the BCD arithmetic functions as well as a rich set of functions for manipulating date, time, and timestamp data values.
With the advent of crypto currencies like Bitcoin it has become possible to securely timestamp information in a decentralized fashion.