Marthe Vassallo
type: MusicGroup
genre: celtic
popularity: 3
followers: 275
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x0f1491371124a542a65caf9adfca0beb4bdcc08531596dd063cbbe87d85bf865
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954667
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954667
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ca5bb183-02dd-477d-9b0e-4d44e09cc296.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ca5bb183-02dd-477d-9b0e-4d44e09cc296.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ca5bb183-02dd-477d-9b0e-4d44e09cc296
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x0f1491371124a542a65caf9adfca0beb4bdcc08531596dd063cbbe87d85bf865","name":"Marthe Vassallo","registered_at":"2026-06-20T22:45:20Z","symbol":"NIM1736788","token_address":"0xd0d02e28635aa0e3a78cbcd2f4e0d1e9fe6880cf","type":"artist","uuid":"ca5bb183-02dd-477d-9b0e-4d44e09cc296"}
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 0x0f1491371124a542a65caf9adfca0beb4bdcc08531596dd063cbbe87d85bf865. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca5bb183-02dd-477d-9b0e-4d44e09cc296.json and https://artists.proofprofile.net/proofs/artist/ca5bb183-02dd-477d-9b0e-4d44e09cc296.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0x0f1491371124a542a65caf9adfca0beb4bdcc08531596dd063cbbe87d85bf865","name":"Marthe Vassallo","registered_at":"2026-06-20T22:45:20Z","symbol":"NIM1736788","token_address":"0xd0d02e28635aa0e3a78cbcd2f4e0d1e9fe6880cf","type":"artist","uuid":"ca5bb183-02dd-477d-9b0e-4d44e09cc296"}
album: Les Chants du livre bleu
  type: MusicAlbum
  date published: 2016-10-12
album: Les Chants du livre bleu
  type: MusicAlbum
  date published: 2016-10-12