Dave Madden
type: MusicGroup
description: David Joseph Madden (December 17, 1931 – January 16, 2014) was a Canadian-born American actor. His most famous role came on the 1970s sitcom The Partridge Family, in which he played the group's manage
popularity: 11
followers: 260
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xdbc98ce6889144069169c501102560ad2fc5630e66cd4f5b9b78545d5d707480
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953754
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953754
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ade4c247-3cdb-4987-9dd2-63a6640a71f5.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ade4c247-3cdb-4987-9dd2-63a6640a71f5.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ade4c247-3cdb-4987-9dd2-63a6640a71f5
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T06:45:19Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xdbc98ce6889144069169c501102560ad2fc5630e66cd4f5b9b78545d5d707480","name":"Dave Madden","registered_at":"2026-06-14T22:43:05Z","symbol":"NIM0599625","token_address":"0x4a81131e7b7a65a12f9e4f705ae1f51df733d7d4","type":"artist","uuid":"ade4c247-3cdb-4987-9dd2-63a6640a71f5"}
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 0xdbc98ce6889144069169c501102560ad2fc5630e66cd4f5b9b78545d5d707480. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ade4c247-3cdb-4987-9dd2-63a6640a71f5.json and https://artists.proofprofile.net/proofs/artist/ade4c247-3cdb-4987-9dd2-63a6640a71f5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T06:45:19Z
  text: {"copyright_id":"0xdbc98ce6889144069169c501102560ad2fc5630e66cd4f5b9b78545d5d707480","name":"Dave Madden","registered_at":"2026-06-14T22:43:05Z","symbol":"NIM0599625","token_address":"0x4a81131e7b7a65a12f9e4f705ae1f51df733d7d4","type":"artist","uuid":"ade4c247-3cdb-4987-9dd2-63a6640a71f5"}
album: Anything Goes
  type: MusicAlbum
  date published: 2007-01-18
album: Open-Eyed
  type: MusicAlbum
  date published: 2010-03-09
album: Live from Austin
  type: MusicAlbum
  date published: 2011-10-29
album: Jacquelyn
  type: MusicAlbum
  date published: 2013-03-26
album: Insecurity (Live On The Ed Sullivan Show, November 3, 1963)
  type: MusicAlbum
  date published: 2020-09-04
album: The 12 Keys of Christmas
  type: MusicAlbum
  date published: 2023-12-06
album: Steal The Naughty List (Original Motion Picture Soundtrack)
  type: MusicAlbum
  date published: 2024-11-15