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

Block 19562

Hash
000000587ad0aa7b105a58550fa30056beb3d848a4fdef5f1e07345c9ab89600
Confirmations
21317
Time
2026-10-10 16:26:58 UTC
Median time
2026-10-10 16:18:43 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
c85f4a0ce9cfe07f659c9432909d49a90540a697d36e2b4c798c5f8c8a7e94c1
Previous block
00000096f89ea21573762ebdcdbd3df86ce25439ac6207c58f8007f5f916b99e
Next block
0000010328ab907ee90e012a5e44c53dd16f8eb30418701bda5c781bb4f5e7f1

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 19562 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
17865fe61cd60b6db3683207c424283c… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
c85f4a0ce9cf…5f8c8a7e94c1 coinbase1250