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

Block 21628

Hash
0000000162e263cc0f00aed2641bf8bba57832ade9f8f28117bd45e57be359c0
Confirmations
20305
Time
2026-10-13 01:53:20 UTC
Median time
2026-10-13 01:44:57 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0031405554
Bits
1e013e69
Merkle root
852090e6e5ac80bd25cbe0867b7927d5d0d6e845619046f51aa835bdce47cf80
Previous block
0000000613e6e3a5d4afa53330b8fb43b92240d5253df85e968b6c5c03f5e033
Next block
000000751415a2f5d32b5b8224560bf6bf94a6f2bf11300be4df5108673868d7

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 21628 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
48ca9bece45c425afa72e3f26168681f… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
852090e6e5ac…35bdce47cf80 coinbase1250