Marcus
type: MusicGroup
description: Marcus, Markus, Márkus or Mărcuș may refer to: Marcus (name), a masculine given name Marcus (praenomen), a Roman personal name Places Marcus, a main belt asteroid, also known as (369088) Marcus 2
popularity: 4
followers: 40
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa7283e3b7e0e64bf7019f7d76a14f33aada43a38506174300a05318e7de94627
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954019
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954019
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/379cee23-b28d-4946-ad77-299ff4da660c.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/379cee23-b28d-4946-ad77-299ff4da660c.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/379cee23-b28d-4946-ad77-299ff4da660c
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T23:44:13Z
additional property: OTSCanonicalRecord
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 0xa7283e3b7e0e64bf7019f7d76a14f33aada43a38506174300a05318e7de94627. Chain 2 (Bitcoin): anchored in block 954019 (2026-06-16T23:44:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/379cee23-b28d-4946-ad77-299ff4da660c.json and https://artists.proofprofile.net/proofs/artist/379cee23-b28d-4946-ad77-299ff4da660c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T23:44:13Z
album: Scusa
  type: MusicAlbum
  date published: 2021-09-24
album: Cieli neri
  type: MusicAlbum
  date published: 2022-07-15
album: Piani alti
  type: MusicAlbum
  date published: 2023-04-14
album: Pardonne-Moi
  type: MusicAlbum
  date published: 2024-05-31