ISB ~ Revelation 1 v3

Blessed:The first of seven benedictions invoked upon those who heed the injunctions of the book (14:13; 16:15; 19:9; 20:6; 22:7, 14) (CCC 2626). he who reads …

those who hear:The distinction between a single reader and multiple listeners implies a public reading of the book. Most likely this would take place in a liturgical setting, where the book would be read by a lector to a congregation assembled for worship.

prophecy:As in the prophetic books of the OT, Revelation combines disclosures about the future with reflections on the past and appeals to remain faithful in the present.