Calvin Markus
type: MusicGroup
popularity: 3
followers: 345
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x58ed28caa283e8b5759cc3ebe599da531ea2ad90ba7cec453d4458b5d833b56a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954647
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954647
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d7b2dae5-c831-4e44-82d9-a2362416399b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d7b2dae5-c831-4e44-82d9-a2362416399b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/d7b2dae5-c831-4e44-82d9-a2362416399b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T04:36:58Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x58ed28caa283e8b5759cc3ebe599da531ea2ad90ba7cec453d4458b5d833b56a","name":"Calvin Markus","registered_at":"2026-06-21T03:26:52Z","symbol":"NIM1805543","token_address":"0x54ae67dde5c1294801a05c1a81f0e64d08b60fe3","type":"artist","uuid":"d7b2dae5-c831-4e44-82d9-a2362416399b"}
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 0x58ed28caa283e8b5759cc3ebe599da531ea2ad90ba7cec453d4458b5d833b56a. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7b2dae5-c831-4e44-82d9-a2362416399b.json and https://artists.proofprofile.net/proofs/artist/d7b2dae5-c831-4e44-82d9-a2362416399b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T04:36:58Z
  text: {"copyright_id":"0x58ed28caa283e8b5759cc3ebe599da531ea2ad90ba7cec453d4458b5d833b56a","name":"Calvin Markus","registered_at":"2026-06-21T03:26:52Z","symbol":"NIM1805543","token_address":"0x54ae67dde5c1294801a05c1a81f0e64d08b60fe3","type":"artist","uuid":"d7b2dae5-c831-4e44-82d9-a2362416399b"}
album: Phases
  type: MusicAlbum
  date published: 2017-08-01
album: Emma's Eyes
  type: MusicAlbum
  date published: 2018-10-19
album: Emma's Eyes
  type: MusicAlbum
  date published: 2018-10-19
album: Vice Versa (Vivaldi Remixed)
  type: MusicAlbum
  date published: 2019-06-07
album: Vice Versa (Vivaldi Remixed)
  type: MusicAlbum
  date published: 2019-06-07
album: Proof
  type: MusicAlbum
  date published: 2019-08-23
album: Unwish
  type: MusicAlbum
  date published: 2020-11-19
album: Begin Again
  type: MusicAlbum
  date published: 2021-07-10
album: If Only
  type: MusicAlbum
  date published: 2024-10-11