Martha AB
type: MusicGroup
popularity: 8
followers: 186
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x56c4b576cb7545b136c39c25e7063dae5cc3bc67e2a8ffd94be2b512a95e6ee9
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954603
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954603
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c012b448-c78d-4dbe-a7ce-cdb4a03d83de.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c012b448-c78d-4dbe-a7ce-cdb4a03d83de.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c012b448-c78d-4dbe-a7ce-cdb4a03d83de
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T21:47:54Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x56c4b576cb7545b136c39c25e7063dae5cc3bc67e2a8ffd94be2b512a95e6ee9","name":"Martha AB","registered_at":"2026-06-20T19:13:02Z","symbol":"NIM1686866","token_address":"0xeda0d79bf6efa1998592e7ee73dd08b97d5b0398","type":"artist","uuid":"c012b448-c78d-4dbe-a7ce-cdb4a03d83de"}
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 0x56c4b576cb7545b136c39c25e7063dae5cc3bc67e2a8ffd94be2b512a95e6ee9. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c012b448-c78d-4dbe-a7ce-cdb4a03d83de.json and https://artists.proofprofile.net/proofs/artist/c012b448-c78d-4dbe-a7ce-cdb4a03d83de.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T21:47:54Z
  text: {"copyright_id":"0x56c4b576cb7545b136c39c25e7063dae5cc3bc67e2a8ffd94be2b512a95e6ee9","name":"Martha AB","registered_at":"2026-06-20T19:13:02Z","symbol":"NIM1686866","token_address":"0xeda0d79bf6efa1998592e7ee73dd08b97d5b0398","type":"artist","uuid":"c012b448-c78d-4dbe-a7ce-cdb4a03d83de"}
album: loved in love
  type: MusicAlbum
  date published: 2020-12-13
album: Wants & Needs
  type: MusicAlbum
  date published: 2021-03-19
album: Wants & Needs
  type: MusicAlbum
  date published: 2021-03-19
album: You and Me
  type: MusicAlbum
  date published: 2023-08-04