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

Block 21399

Hash
000000865fe06d5fe65be2f35a006a3bab3b252bf2e1a06a1d14e5f893009f90
Confirmations
20704
Time
2026-10-12 19:29:26 UTC
Median time
2026-10-12 19:21:14 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0031405554
Bits
1e013e69
Merkle root
c8b81952f240f565deffc14957c116d7632d2f5818f535bd736452bd28329c4f
Previous block
0000012125ff01e8b1e3cf71a05452779df4ab08ad3cef97586cdfed10495fa9
Next block
0000004cfef1112431c52fe23a90db5616005c39be9b5c063c48e55216580771

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 21399 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
23fd700db9507cbddfdbd1a01991cfa3… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
c8b81952f240…52bd28329c4f coinbase1250