Marthe Lea
type: MusicGroup
genre: free jazz
popularity: 6
followers: 112
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x178a4fd704e33c8e30161401ef4e2af179558dfa4267035cda865b9eea5f022f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954615
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954615
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c4ff53b3-48d4-44c5-aeec-665b061a4093.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c4ff53b3-48d4-44c5-aeec-665b061a4093.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c4ff53b3-48d4-44c5-aeec-665b061a4093
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T22:44:50Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x178a4fd704e33c8e30161401ef4e2af179558dfa4267035cda865b9eea5f022f","name":"Marthe Lea","registered_at":"2026-06-20T20:54:44Z","symbol":"NIM1711868","token_address":"0x0dd1a50f4c1aa4efe4e04e6288d905fd7d78962a","type":"artist","uuid":"c4ff53b3-48d4-44c5-aeec-665b061a4093"}
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 0x178a4fd704e33c8e30161401ef4e2af179558dfa4267035cda865b9eea5f022f. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4ff53b3-48d4-44c5-aeec-665b061a4093.json and https://artists.proofprofile.net/proofs/artist/c4ff53b3-48d4-44c5-aeec-665b061a4093.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T22:44:50Z
  text: {"copyright_id":"0x178a4fd704e33c8e30161401ef4e2af179558dfa4267035cda865b9eea5f022f","name":"Marthe Lea","registered_at":"2026-06-20T20:54:44Z","symbol":"NIM1711868","token_address":"0x0dd1a50f4c1aa4efe4e04e6288d905fd7d78962a","type":"artist","uuid":"c4ff53b3-48d4-44c5-aeec-665b061a4093"}