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

Block 21520

Hash
000001085a0b051fad2be6a1be1b9d6c768a948d60242b82c955357e0d337b59
Confirmations
19827
Time
2026-10-12 22:51:21 UTC
Median time
2026-10-12 22:42:51 UTC
Transactions
2
Size
2,977
Weight
11,596
Difficulty
0.0031405554
Bits
1e013e69
Merkle root
6d4648ec9962bee96325f94200da50ade470d972a695e687888fd60b9dbfcd8b
Previous block
000000cb951376099c6d204f9696aa6973ec368bce0df420b0905b7124c66ed8
Next block
000000bad34105db3f328e1564f3d5382b8ba5c7a1cd70bc2545d1ed5485aa45

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 21520 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
6c0c7125a96302d9b1913b4b42f1da23… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
258468ff6c0d…70f03896030f coinbase1250.0000031
d4adad4fa61c…491d273827b5 pays to P2MR129.99987270.0000031