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

Block 19604

Hash
0000001fc7c9d9c2f06e6f8d7d497b481daee6bae6bc688a5487362577bb0eb9
Confirmations
22667
Time
2026-10-10 17:37:28 UTC
Median time
2026-10-10 17:28:57 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
69598ac454e2ab171b8fef7a0ec76fffad54ec57701bf79920eb1996aaeff068
Previous block
000000c865f2dbd53939ed7e3162e966e3ec9abc448d64533291172549f1ce1e
Next block
0000005d3d85d7e82bf655785e32c047d7d553d5b5df43935c70298b083d741f

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 19604 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
9f800356e34192e4e32b3058066b80b9… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
69598ac454e2…1996aaeff068 coinbase1250