A method includes generating, by a computing device, a unique identifier (ID) based on copyright information associated with textual content, wherein the copyright information and the textual content are recorded on a blockchain of a blockchain network; identifying, by the computing device, one or more attributes associated with punctuation marks included in the textual content; and embedding, by the computing device, the unique ID in the textual content by changing the one or more attributes associated with the punctuation marks in a manner representative of the unique ID, wherein the embedding produces information-embedded text configured to enable retrieval of the copyright information from the blockchain based on the unique ID, and wherein visual difference between the textual content and the information-embedded text is not apparent to an unaided human eye.