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

Block 19756

Hash
000000a7f9801cbb3f8153841e59d0780c06d4eaf04370938eb0abb02d5e1ff1
Confirmations
21010
Time
2026-10-10 21:54:50 UTC
Median time
2026-10-10 21:46:39 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
810671ff94cb131e1f56d7fa90706bbe901e1ea27bfb691296841baea92352e7
Previous block
0000005a2b614c87e3e383c641ad4587c5c665b65689beb5d810b216e8f6b9b6
Next block
0000001b5dbe98105f85984ecce2799e7a63cd5fca61939b53ee952e14d67a95

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 19756 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
c07967c1aaac6e9a52cc495f7ba2e83d… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
810671ff94cb…1baea92352e7 coinbase1250