Abstract: An example operation may include one or more of receiving proof of performance of an activity from a receiver system, identifying a data block, among a hash-linked chain of data blocks, that includes a bespoke crypto token associated with the activity, reading one or more requirements of the activity based on programmable instructions embedded within the bespoke crypto-token, determining whether the one or more requirements of the activity have been satisfied based on content included within the proof of performance, and in response to the one or more requirements being satisfied, releasing the crypto token to the receiver system.