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

Block 19219

Hash
00000064271a7741f5fe343e8fca2945c9258b9604140d76b9f7254fb37a80d3
Confirmations
22799
Time
2026-10-10 06:52:47 UTC
Median time
2026-10-10 06:44:08 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
6c60e59ae4539aedb88fea12f71a6c8992f739e43f9d37fb900ddc652677a75c
Previous block
000000b74603c1a09eb1953514681dc39fb6caa640deaf158799f619226ac30a
Next block
000000cf40bc9eb07551bc9379ef6eb0fe3452ee84bd79e1989fc4c94b1a15c4

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 19219 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
265674c546fe3ee2368a110b72192ad1… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
6c60e59ae453…dc652677a75c coinbase1250