Ken Holland
type: MusicGroup
description: Kenneth Mark Holland (born November 10, 1955) is a Canadian ice hockey executive and former goaltender, and is currently serving as the vice president and general manager of the Los Angeles Kings in t
popularity: 4
followers: 173
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x43de41aab6076dad1227c8ee88b05345b106ec104b61fa5f8611284b32fd6a85
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953877
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953877
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/02cd50ad-773e-4e88-b15f-ff4a10a629d0.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/02cd50ad-773e-4e88-b15f-ff4a10a629d0.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/02cd50ad-773e-4e88-b15f-ff4a10a629d0
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T02:39:16Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x43de41aab6076dad1227c8ee88b05345b106ec104b61fa5f8611284b32fd6a85","name":"Ken Holland","registered_at":"2026-06-15T14:29:09Z","symbol":"NIM0737159","token_address":"0x5af7f420d34a5dd3678d2b47d40f048406598668","type":"artist","uuid":"02cd50ad-773e-4e88-b15f-ff4a10a629d0"}
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43de41aab6076dad1227c8ee88b05345b106ec104b61fa5f8611284b32fd6a85. Chain 2 (Bitcoin): anchored in block 953877 (2026-06-16T02:39:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/02cd50ad-773e-4e88-b15f-ff4a10a629d0.json and https://artists.proofprofile.net/proofs/artist/02cd50ad-773e-4e88-b15f-ff4a10a629d0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T02:39:16Z
  text: {"copyright_id":"0x43de41aab6076dad1227c8ee88b05345b106ec104b61fa5f8611284b32fd6a85","name":"Ken Holland","registered_at":"2026-06-15T14:29:09Z","symbol":"NIM0737159","token_address":"0x5af7f420d34a5dd3678d2b47d40f048406598668","type":"artist","uuid":"02cd50ad-773e-4e88-b15f-ff4a10a629d0"}
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