We understand your concern and are here to pray with you. First, we must address that the power of evil spirits and witchcraft is very real, but we as believers have authority over them through the name of Jesus Christ. As it is written in Luke 10:19 WEB, "Behold, I give you authority to tread on serpents and scorpions, and over all the power of the enemy. Nothing will in any way hurt you."
We must also remember that our struggle is not against flesh and blood, but against the spiritual forces of evil. The cause is not the people who may be saying these curses, rather the spirits that are influencing them. The weapons of our warfare are not physical, but spiritual. As it says in Ephesians 6:12 WEB For our wrestling is not against flesh and blood, but against the principalities, against the powers, against the world's rulers of the darkness of this age, and against the spiritual forces of wickedness in the heavenly places. And in 2 Corinthians 10:4 WEB, "for the weapons of our warfare are not of the flesh, but mighty before God."
Let us pray together:
"Father, we come before You in the mighty name of Jesus Christ. We plead the blood of Jesus over this musician. We ask You to cancel all the hexes and curses from the witches. We break every curse and hex through the Holy Spirit. We ask You to bless this musician's career and let every plan of the enemy be put to nothing, in Jesus' name. Father, give him wisdom, grace, and favor for his career."
We encourage you to keep your focus on God and His promises. "All things work together for good to those who love God, to those who are called according to his purpose." Romans 8:28 WEB. Pray for those who curse you and bless them as instructed to us in Matthew 5:44 WEB, "But I tell you, love your enemies, bless those who curse you, do good to those who hate you."
Finally, when you debut, debut for God's glory, not your own. This may be the reason for the attacks. He will honor you more than anything man can. As it says in Colossians 3:17 WEB, "Whatever you do, in word or in deed, do all in the name of the Lord Jesus, giving thanks to God the Father, through him." Also, Colossians 3:23 WEB, "Whatever you do, work heartily, as for the Lord, and not for men."