Bill Madden
type: MusicGroup
genre: folk rock
genre: singer-songwriter
description: Bill or William Madden may refer to: William Madden (piper) (fl. 1855–1857), Irish piper William Madden (sailor) (1843–?), U.S. Navy Medal of Honor recipient Billy Madden (1852–1918), American pugili
popularity: 10
followers: 264
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa298cd62d8a859b475946fbfe178cdf1cd7a7f9d7c084fc5dacfb7ca77eb1a7e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953885
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953885
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0c69ed95-8698-49a7-b236-edf8fa911f2e.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0c69ed95-8698-49a7-b236-edf8fa911f2e.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/0c69ed95-8698-49a7-b236-edf8fa911f2e
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T04:12:47Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa298cd62d8a859b475946fbfe178cdf1cd7a7f9d7c084fc5dacfb7ca77eb1a7e","name":"Bill Madden","registered_at":"2026-06-15T17:53:03Z","symbol":"NIM0785839","token_address":"0x11b4df062227eef24477588611f220f76c9a21f0","type":"artist","uuid":"0c69ed95-8698-49a7-b236-edf8fa911f2e"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa298cd62d8a859b475946fbfe178cdf1cd7a7f9d7c084fc5dacfb7ca77eb1a7e. Chain 2 (Bitcoin): anchored in block 953885 (2026-06-16T04:12:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0c69ed95-8698-49a7-b236-edf8fa911f2e.json and https://artists.proofprofile.net/proofs/artist/0c69ed95-8698-49a7-b236-edf8fa911f2e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T04:12:47Z
  text: {"copyright_id":"0xa298cd62d8a859b475946fbfe178cdf1cd7a7f9d7c084fc5dacfb7ca77eb1a7e","name":"Bill Madden","registered_at":"2026-06-15T17:53:03Z","symbol":"NIM0785839","token_address":"0x11b4df062227eef24477588611f220f76c9a21f0","type":"artist","uuid":"0c69ed95-8698-49a7-b236-edf8fa911f2e"}
album: Samsara's Grip
  type: MusicAlbum
  date published: 2004-05-18
album: Gone
  type: MusicAlbum
  date published: 2006-01-17
album: Child of the Same God
  type: MusicAlbum
  date published: 2008-10-14
album: New Religion
  type: MusicAlbum
  date published: 2014-09-09