Ark-0
Ark-0 is a test network for trying things out. It may be reset at any time.

Block 21739

Hash
0000006949cfe61b3b41def87e9cdaad68a36609c25a015e312dcb216a82c210
Confirmations
19923
Time
2026-10-13 04:58:58 UTC
Median time
2026-10-13 04:51:00 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0031405554
Bits
1e013e69
Merkle root
6201bbff395443c1665c11189b7a0111e25b2cfc8ed87f37b96efe27f99662a0
Previous block
000000d343ae1f790eb7847ddb14f5e97ee2ed98878d67c23d0377b21a24e074
Next block
000000d8e33c2d54ce91434b4cb73eed4b740ea256de641cfc5384c2c19704db

ML-DSA-44 block signature (M2)

M2 is an experimental rule of this test network. From a height set in its build, a node that enforces M2 accepts a block only if, besides the classical signet signature, the block carries a valid ML-DSA-44 signature by the Ark-0 block key, in its coinbase's witness commitment output. This page shows that signature; it does not check it.

Block 21739 is at or above the activation height 20000: nodes that enforce M2 accept a block there only with a valid ML-DSA-44 block signature.

The node behind this site enforces M2 and holds this block, so its block signature passed the node's check.

Status
In the form M2 requires, followed by the signet solution push (the classical signature)
Signature
e955c25ae86dd99b7b75568a157d4a2f… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
6201bbff3954…fe27f99662a0 coinbase1250