diff --git a/cli/util/uploader.go b/cli/util/uploader.go
index 70b44e92f8..8ebe39fc78 100644
--- a/cli/util/uploader.go
+++ b/cli/util/uploader.go
@@ -83,6 +83,11 @@ func uploadBin(ctx *cli.Context) error {
 		return cli.Exit(fmt.Sprintf("failed to create RPC client: %v", err), 1)
 	}
 
+	v, err := rpc.GetVersion()
+	if err != nil {
+		return cli.Exit(fmt.Sprintf("failed to get version from RPC: %v", err), 1)
+	}
+	magic := strconv.Itoa(int(v.Protocol.Network))
 	currentBlockHeight, err := rpc.GetBlockCount()
 	if err != nil {
 		return cli.Exit(fmt.Sprintf("failed to get current block height from RPC: %v", err), 1)
@@ -158,10 +163,11 @@ func uploadBin(ctx *cli.Context) error {
 					}
 					attrs := []object.Attribute{
 						*object.NewAttribute(attr, strconv.Itoa(int(blk.Index))),
-						*object.NewAttribute("primary", strconv.Itoa(int(blk.PrimaryIndex))),
-						*object.NewAttribute("hash", blk.Hash().StringLE()),
-						*object.NewAttribute("prevHash", blk.PrevHash.StringLE()),
-						*object.NewAttribute("timestamp", strconv.FormatUint(blk.Timestamp, 10)),
+						*object.NewAttribute("Primary", strconv.Itoa(int(blk.PrimaryIndex))),
+						*object.NewAttribute("Hash", blk.Hash().StringLE()),
+						*object.NewAttribute("PrevHash", blk.PrevHash.StringLE()),
+						*object.NewAttribute("Timestamp", strconv.FormatUint(blk.Timestamp, 10)),
+						*object.NewAttribute("Magic", magic),
 					}
 
 					err = retry(func() error {
@@ -192,7 +198,7 @@ func uploadBin(ctx *cli.Context) error {
 		fmt.Fprintf(ctx.App.Writer, "Successfully uploaded batch of blocks: from %d to %d\n", batchStart, batchEnd-1)
 	}
 
-	err = updateIndexFiles(ctx, p, containerID, *acc, signer, uint(currentBlockHeight), attr, homomorphicHashingDisabled)
+	err = updateIndexFiles(ctx, p, containerID, *acc, signer, uint(currentBlockHeight), attr, magic, homomorphicHashingDisabled)
 	if err != nil {
 		return cli.Exit(fmt.Errorf("failed to update index files after upload: %w", err), 1)
 	}
@@ -284,7 +290,7 @@ func fetchLatestMissingBlockIndex(ctx context.Context, p *pool.Pool, containerID
 }
 
 // updateIndexFiles updates the index files in the container.
-func updateIndexFiles(ctx *cli.Context, p *pool.Pool, containerID cid.ID, account wallet.Account, signer user.Signer, currentHeight uint, blockAttributeKey string, homomorphicHashingDisabled bool) error {
+func updateIndexFiles(ctx *cli.Context, p *pool.Pool, containerID cid.ID, account wallet.Account, signer user.Signer, currentHeight uint, blockAttributeKey string, magic string, homomorphicHashingDisabled bool) error {
 	attributeKey := ctx.String("index-attribute")
 	indexFileSize := ctx.Uint("index-file-size")
 	fmt.Fprintln(ctx.App.Writer, "Updating index files...")
@@ -292,7 +298,7 @@ func updateIndexFiles(ctx *cli.Context, p *pool.Pool, containerID cid.ID, accoun
 	prm := client.PrmObjectSearch{}
 	filters := object.NewSearchFilters()
 	filters.AddFilter(attributeKey, fmt.Sprintf("%d", 0), object.MatchNumGE)
-	filters.AddFilter("size", fmt.Sprintf("%d", indexFileSize), object.MatchStringEqual)
+	filters.AddFilter("Size", fmt.Sprintf("%d", indexFileSize), object.MatchStringEqual)
 	prm.SetFilters(filters)
 	var (
 		objectIDs []oid.ID
@@ -394,7 +400,8 @@ func updateIndexFiles(ctx *cli.Context, p *pool.Pool, containerID cid.ID, accoun
 		}
 		attrs := []object.Attribute{
 			*object.NewAttribute(attributeKey, strconv.Itoa(int(i))),
-			*object.NewAttribute("size", strconv.Itoa(int(indexFileSize))),
+			*object.NewAttribute("Size", strconv.Itoa(int(indexFileSize))),
+			*object.NewAttribute("Magic", magic),
 		}
 		err = uploadObj(ctx.Context, p, signer, account.PrivateKey().GetScriptHash(), containerID, buffer, attrs, homomorphicHashingDisabled)
 		if err != nil {
diff --git a/config/protocol.testnet.yml b/config/protocol.testnet.yml
index ecdfd6eed6..62ec63ddc6 100644
--- a/config/protocol.testnet.yml
+++ b/config/protocol.testnet.yml
@@ -111,5 +111,5 @@ ApplicationConfiguration:
     SkipIndexFilesSearch: false
     IndexFileSize: 128000
     ContainerID: "EPGuD26wYgQJbmDdVBoYoNZiMKHwFMJT3A5WqPjdUHxH"
-    BlockAttribute: "block"
-    IndexFileAttribute: "index"
+    BlockAttribute: "Block"
+    IndexFileAttribute: "Index"
diff --git a/docs/neofs-blockstorage.md b/docs/neofs-blockstorage.md
index b57dda11c8..79e9769f95 100644
--- a/docs/neofs-blockstorage.md
+++ b/docs/neofs-blockstorage.md
@@ -12,17 +12,19 @@ efficiency and reduce node storage size.
 A single NeoFS container is used to store blocks and index files. Each block
 is stored in a binary form as a separate object with a unique OID and a set of
 attributes:
- - block object identifier with block index value (`block:1`)
- - primary node index (`primary:0`)
- - block hash in the LE form (`hash:5412a781caf278c0736556c0e544c7cfdbb6e3c62ae221ef53646be89364566b`)
- - previous block hash in the LE form (`prevHash:3654a054d82a8178c7dfacecc2c57282e23468a42ee407f14506368afe22d929`)
- - millisecond-precision block timestamp (`timestamp:1627894840919`)
+ - block object identifier with block index value (`Block:1`)
+ - primary node index (`Primary:0`)
+ - block hash in the LE form (`Hash:5412a781caf278c0736556c0e544c7cfdbb6e3c62ae221ef53646be89364566b`)
+ - previous block hash in the LE form (`PrevHash:3654a054d82a8178c7dfacecc2c57282e23468a42ee407f14506368afe22d929`)
+ - millisecond-precision block timestamp (`Timestamp:1627894840919`)
+ - network magic (`Magic:56753`)
 
 Each index file is an object containing a constant-sized batch of raw block object
 IDs in binary form ordered by block index. Each index file is marked with the
 following attributes:
- - index file identifier with consecutive file index value (`index:0`)
- - the number of OIDs included into index file (`size:128000`)
+ - index file identifier with consecutive file index value (`Index:0`)
+ - the number of OIDs included into index file (`Size:128000`)
+ - network magic (`Magic:56753`)
 
 ### NeoFS BlockFetcher
 
@@ -79,7 +81,7 @@ them to the NeoFS container.
 It also creates and uploads index files. Below is an example usage of the command:
 
 ```shell
-./bin/neo-go util upload-bin --cid 9iVfUg8aDHKjPC4LhQXEkVUM4HDkR7UCXYLs8NQwYfSG --wallet-config ./wallet-config.yml --block-attribute block --index-attribute index --rpc-endpoint https://rpc.t5.n3.nspcc.ru:20331 -fsr st1.t5.fs.neo.org:8080 -fsr st2.t5.fs.neo.org:8080 -fsr st3.t5.fs.neo.org:8080
+./bin/neo-go util upload-bin --cid 9iVfUg8aDHKjPC4LhQXEkVUM4HDkR7UCXYLs8NQwYfSG --wallet-config ./wallet-config.yml --block-attribute Block --index-attribute Index --rpc-endpoint https://rpc.t5.n3.nspcc.ru:20331 -fsr st1.t5.fs.neo.org:8080 -fsr st2.t5.fs.neo.org:8080 -fsr st3.t5.fs.neo.org:8080
 ```
 The command supports the following options:
 ```