MarMat aka Er Professre
type: MusicGroup
genre: indie rock
popularity: 7
followers: 11
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x0f5b8ca216291880554163fb709b33e63d4c58a9c687cce2014b8f00e1c657fd
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5fa11516-2acd-4853-9459-5501c0862326.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5fa11516-2acd-4853-9459-5501c0862326.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/5fa11516-2acd-4853-9459-5501c0862326
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x0f5b8ca216291880554163fb709b33e63d4c58a9c687cce2014b8f00e1c657fd","name":"MarMat aka Er Professre","registered_at":"2026-06-16T23:16:57Z","symbol":"NIM1206798","token_address":"0xf02bd628a493a5e6116eb9c81b651a274f782c1b","type":"artist","uuid":"5fa11516-2acd-4853-9459-5501c0862326"}
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 0x0f5b8ca216291880554163fb709b33e63d4c58a9c687cce2014b8f00e1c657fd. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5fa11516-2acd-4853-9459-5501c0862326.json and https://artists.proofprofile.net/proofs/artist/5fa11516-2acd-4853-9459-5501c0862326.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x0f5b8ca216291880554163fb709b33e63d4c58a9c687cce2014b8f00e1c657fd","name":"MarMat aka Er Professre","registered_at":"2026-06-16T23:16:57Z","symbol":"NIM1206798","token_address":"0xf02bd628a493a5e6116eb9c81b651a274f782c1b","type":"artist","uuid":"5fa11516-2acd-4853-9459-5501c0862326"}
album: Radio Killer (Remastered)
  type: MusicAlbum
  date published: 2015-06-24
album: AnDiMa
  type: MusicAlbum
  date published: 2016-06-09
album: Heart
  type: MusicAlbum
  date published: 2021-11-11
album: 1977 Instrumental
  type: MusicAlbum
  date published: 2023-08-07
album: The Last King
  type: MusicAlbum
  date published: 2024-07-05
album: Blu Zoo
  type: MusicAlbum
  date published: 2025-01-22
album: EPICA
  type: MusicAlbum
  date published: 2025-04-01