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

Block 19781

Hash
0000007b706c6a9073fc64b63cd753aff622164f3abba2ab45580e70df3f7056
Confirmations
21600
Time
2026-10-10 22:36:47 UTC
Median time
2026-10-10 22:28:05 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
334de0bb5c967bea23fb3fb6b36a735a77fc59c9aa65e5b7c8079bac2bc22753
Previous block
0000001364dd81453aedcccdc2afe329c5d47a3dea5041d616da7077f9b3175c
Next block
00000099182889ebd68dc765c85cd9256ccf4e76fba3f5c415fc66624e13d1ad

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 19781 is below the activation height 20000: nodes do not require this signature, and only log the result of checking it when run with -debug=validation. The block producer adds it from height 18000 on, so that nodes can check it before it is required.

Status
In the form M2 requires, followed by the signet solution push (the classical signature)
Signature
e48f5cf66c03e6fffd872193fd6f1c30… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
334de0bb5c96…9bac2bc22753 coinbase1250