diff --git a/cmd/telesrv/main.go b/cmd/telesrv/main.go
index e297a8d8..060bf48c 100644
--- a/cmd/telesrv/main.go
+++ b/cmd/telesrv/main.go
@@ -1007,12 +1007,10 @@ func run(logger *zap.Logger) error {
 			account.WithLoginEmailVerification(codeStore, loginEmailSender, cfg.AuthCodeTTL, cfg.AuthCodeMaxAttempts, cfg.LoginEmailCodeLength))
 	}
 	accountService := account.NewService(passwordStore, accountOptions...)
-	reservedUsernameStore := postgres.NewReservedUsernameStore(pool)
 	botsService := botsapp.NewService(userStore, botStore, messageStore,
 		botsapp.WithLogger(logger.Named("bots")),
 		botsapp.WithBlockChecker(contactStore),
 		botsapp.WithPublicChannelUsernameResolver(channelStore),
-		botsapp.WithReservedUsernames(reservedUsernameStore),
 		botsapp.WithUserCache(userCache),
 		botsapp.WithStickerSetCreator(filesService),
 		botsapp.WithGifCatalogSource(filesService),
@@ -1205,6 +1203,7 @@ func run(logger *zap.Logger) error {
 	// Collectible (NFT) usernames are an optional read model projected at the
 	// protocol edge.
 	collectibleUsernameStore := postgres.NewCollectibleUsernameStore(pool)
+	reservedUsernameStore := postgres.NewReservedUsernameStore(pool)
 	usernamesService := usernamesapp.NewService(
 		usernamesapp.WithRegistryStore(collectibleUsernameStore),
 		usernamesapp.WithCollectibleStore(collectibleUsernameStore),
diff --git a/internal/app/bots/service.go b/internal/app/bots/service.go
index ac564336..fe171cad 100644
--- a/internal/app/bots/service.go
+++ b/internal/app/bots/service.go
@@ -121,7 +121,6 @@ type Service struct {
 	messages              store.MessageStore
 	blocker               blockChecker
 	channels              publicChannelUsernameResolver
-	reserved              reservedUsernameChecker
 	stickers              stickerSetCreator
 	installer             userStickerSetInstaller
 	aiChat                aiChatGenerator
@@ -200,21 +199,6 @@ func WithBotAvatarStore(a botAvatarStore) Option {
 
 // WithPublicChannelUsernameResolver 注入公开频道 username 查询能力，用于 bot
 // username 预检，避免 bot 与 public channel 产生同名可见入口。
-// reservedUsernameChecker reports whether a name is on the operator blocklist.
-type reservedUsernameChecker interface {
-	IsReserved(ctx context.Context, usernameLower string) (bool, error)
-}
-
-// WithReservedUsernames wires the operator username blocklist so CheckUsername
-// reports a reserved bot name as taken instead of available.
-func WithReservedUsernames(c reservedUsernameChecker) Option {
-	return func(s *Service) {
-		if c != nil {
-			s.reserved = c
-		}
-	}
-}
-
 func WithPublicChannelUsernameResolver(c publicChannelUsernameResolver) Option {
 	return func(s *Service) {
 		if c != nil {
@@ -549,13 +533,6 @@ func (s *Service) CheckUsername(ctx context.Context, ownerUserID int64, username
 	if !domain.ValidBotUsername(username) {
 		return false, domain.ErrBotUsernameInvalid
 	}
-	if s.reserved != nil {
-		if r, err := s.reserved.IsReserved(ctx, strings.ToLower(username)); err != nil {
-			return false, err
-		} else if r {
-			return false, nil
-		}
-	}
 	if _, found, err := s.users.ByUsername(ctx, username); err != nil {
 		return false, err
 	} else if found {
diff --git a/internal/store/memory/channel_settings.go b/internal/store/memory/channel_settings.go
index c5c173cc..14f9089e 100644
--- a/internal/store/memory/channel_settings.go
+++ b/internal/store/memory/channel_settings.go
@@ -128,9 +128,6 @@ func (s *ChannelStore) CheckUsername(_ context.Context, userID, channelID int64,
 		return false, err
 	}
 	usernameLower := strings.ToLower(strings.TrimSpace(strings.TrimPrefix(username, "@")))
-	if s.usernameRegistry != nil && s.usernameRegistry.nameReserved(usernameLower) {
-		return false, nil
-	}
 	for id, channel := range s.channels {
 		if channel.Deleted || channel.Username == "" {
 			continue
diff --git a/internal/store/memory/collectible_username.go b/internal/store/memory/collectible_username.go
index f4c79f8a..e53850f6 100644
--- a/internal/store/memory/collectible_username.go
+++ b/internal/store/memory/collectible_username.go
@@ -67,10 +67,8 @@ func (s *CollectibleUsernameStore) WithReservedUsernames(reserved *ReservedUsern
 	return s
 }
 
-// nameReserved reports whether a name is on the operator blocklist. It touches
-// only s.reserved (its own lock), so it is safe from any context.
-func (s *CollectibleUsernameStore) nameReserved(usernameLower string) bool {
-	if s == nil || s.reserved == nil {
+func (s *CollectibleUsernameStore) nameReservedLocked(usernameLower string) bool {
+	if s.reserved == nil {
 		return false
 	}
 	r, _ := s.reserved.IsReserved(context.Background(), usernameLower)
@@ -121,7 +119,7 @@ func (s *CollectibleUsernameStore) SetEditableUsername(_ context.Context, peer d
 		return false, domain.ErrUsernameInvalid
 	}
 	key := strings.ToLower(username)
-	if s.nameReserved(key) {
+	if s.nameReservedLocked(key) {
 		return false, domain.ErrUsernameOccupied
 	}
 	if existing, ok := s.registry[key]; ok {
@@ -336,7 +334,7 @@ func (s *CollectibleUsernameStore) MintCollectibleUsername(_ context.Context, re
 	if _, ok := s.registry[key]; ok {
 		return domain.CollectibleUsername{}, false, domain.ErrUsernameOccupied
 	}
-	if s.nameReserved(key) {
+	if s.nameReservedLocked(key) {
 		return domain.CollectibleUsername{}, false, domain.ErrUsernameOccupied
 	}
 	now := time.Now().UTC()
diff --git a/internal/store/memory/reserved_username_test.go b/internal/store/memory/reserved_username_test.go
deleted file mode 100644
index f6f01e9b..00000000
--- a/internal/store/memory/reserved_username_test.go
+++ /dev/null
@@ -1,37 +0,0 @@
-package memory
-
-import (
-	"context"
-	"testing"
-
-	"telesrv/internal/domain"
-)
-
-func TestCheckUsernameReportsReservedAsTaken(t *testing.T) {
-	ctx := context.Background()
-	reserved := NewReservedUsernameStore()
-	if _, err := reserved.ReserveUsername(ctx, "support", "official", "ops"); err != nil {
-		t.Fatalf("seed reserve: %v", err)
-	}
-	registry := NewCollectibleUsernameStore().WithReservedUsernames(reserved)
-
-	users := NewUserStore()
-	users.AttachUsernameRegistry(registry)
-	u, _ := users.Create(ctx, domain.User{AccessHash: 1, Phone: "15550001000", FirstName: "A"})
-	if ok, err := users.CheckUsername(ctx, u.ID, "support"); err != nil || ok {
-		t.Fatalf("CheckUsername(reserved) = %v, %v; want false, nil", ok, err)
-	}
-	if ok, err := users.CheckUsername(ctx, u.ID, "freename"); err != nil || !ok {
-		t.Fatalf("CheckUsername(free) = %v, %v; want true, nil", ok, err)
-	}
-
-	channels := NewChannelStore()
-	channels.AttachUsernameRegistry(registry)
-	created, err := channels.CreateChannel(ctx, domain.CreateChannelRequest{CreatorUserID: u.ID, Title: "C", Megagroup: true, Date: 1})
-	if err != nil {
-		t.Fatalf("create channel: %v", err)
-	}
-	if ok, err := channels.CheckUsername(ctx, u.ID, created.Channel.ID, "support"); err != nil || ok {
-		t.Fatalf("channel CheckUsername(reserved) = %v, %v; want false, nil", ok, err)
-	}
-}
diff --git a/internal/store/memory/users.go b/internal/store/memory/users.go
index 0b3656c0..196851a7 100644
--- a/internal/store/memory/users.go
+++ b/internal/store/memory/users.go
@@ -158,9 +158,6 @@ func (s *UserStore) CheckUsername(_ context.Context, userID int64, username stri
 	if username == "" {
 		return true, nil
 	}
-	if s.usernameRegistry != nil && s.usernameRegistry.nameReserved(username) {
-		return false, nil
-	}
 	s.mu.RLock()
 	defer s.mu.RUnlock()
 	for id, u := range s.byID {
diff --git a/internal/store/postgres/peer_username.go b/internal/store/postgres/peer_username.go
index 7af1face..1de75769 100644
--- a/internal/store/postgres/peer_username.go
+++ b/internal/store/postgres/peer_username.go
@@ -77,11 +77,6 @@ func usernameReservedTx(ctx context.Context, db sqlcgen.DBTX, usernameLower stri
 }
 
 func peerUsernameAvailable(ctx context.Context, db sqlcgen.DBTX, usernameLower, peerType string, peerID int64) (bool, error) {
-	if reserved, err := usernameReservedTx(ctx, db, usernameLower); err != nil {
-		return false, err
-	} else if reserved {
-		return false, nil
-	}
 	owner, found, err := getPeerUsernameOwner(ctx, db, usernameLower, false)
 	if err != nil || !found {
 		return !found, err