Mark Hill
type: MusicGroup
description: Mark or Marc Hill may refer to: Marc Hill (1952–2025), American baseball player Marc Lamont Hill (born 1978), American academic, journalist, author, activist and television personality Mark Hill (
popularity: 4
followers: 133
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3e233f533940b7258228c6637f73d60434f6aef91886a9164f8f3f8bead731a3
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954742
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954742
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fef8b436-718b-4e38-a769-e4a4324f1949.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fef8b436-718b-4e38-a769-e4a4324f1949.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/fef8b436-718b-4e38-a769-e4a4324f1949
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T20:46:40Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x3e233f533940b7258228c6637f73d60434f6aef91886a9164f8f3f8bead731a3","name":"Mark Hill","registered_at":"2026-06-21T18:30:59Z","symbol":"NIM2002306","token_address":"0x4a632c90110484f7c5c2560b6b54b23dcb58284d","type":"artist","uuid":"fef8b436-718b-4e38-a769-e4a4324f1949"}
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 0x3e233f533940b7258228c6637f73d60434f6aef91886a9164f8f3f8bead731a3. Chain 2 (Bitcoin): anchored in block 954742 (2026-06-21T20:46:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fef8b436-718b-4e38-a769-e4a4324f1949.json and https://artists.proofprofile.net/proofs/artist/fef8b436-718b-4e38-a769-e4a4324f1949.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T20:46:40Z
  text: {"copyright_id":"0x3e233f533940b7258228c6637f73d60434f6aef91886a9164f8f3f8bead731a3","name":"Mark Hill","registered_at":"2026-06-21T18:30:59Z","symbol":"NIM2002306","token_address":"0x4a632c90110484f7c5c2560b6b54b23dcb58284d","type":"artist","uuid":"fef8b436-718b-4e38-a769-e4a4324f1949"}
album: Alchemy
  type: MusicAlbum
  date published: 2006-12-01
album: picks on chet
  type: MusicAlbum
  date published: 2010-04-01
album: Sad Steps - Music of Tragedy and Grief
  type: MusicAlbum
  date published: 2015-04-01