Mari Black
type: MusicGroup
genre: celtic
description: Mari Black is an American multistyle violinist, fiddler, and composer from Boston, Massachusetts. She has won national and international accolades in many styles of music, including being named the 2
popularity: 2
followers: 313
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xdb32f6dfc91ca6289387bea46b96d6f671aacba543756a37145d154cd36ecc6c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953978
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953978
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2bf167cf-7249-4896-9a35-bc9fe2565def.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2bf167cf-7249-4896-9a35-bc9fe2565def.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2bf167cf-7249-4896-9a35-bc9fe2565def
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T17:11:18Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xdb32f6dfc91ca6289387bea46b96d6f671aacba543756a37145d154cd36ecc6c","name":"Mari Black","registered_at":"2026-06-16T04:50:12Z","symbol":"NIM0942675","token_address":"0xe25fe06a6220a9d5504ef2f062e123044551c640","type":"artist","uuid":"2bf167cf-7249-4896-9a35-bc9fe2565def"}
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 0xdb32f6dfc91ca6289387bea46b96d6f671aacba543756a37145d154cd36ecc6c. Chain 2 (Bitcoin): anchored in block 953978 (2026-06-16T17:11:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2bf167cf-7249-4896-9a35-bc9fe2565def.json and https://artists.proofprofile.net/proofs/artist/2bf167cf-7249-4896-9a35-bc9fe2565def.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T17:11:18Z
  text: {"copyright_id":"0xdb32f6dfc91ca6289387bea46b96d6f671aacba543756a37145d154cd36ecc6c","name":"Mari Black","registered_at":"2026-06-16T04:50:12Z","symbol":"NIM0942675","token_address":"0xe25fe06a6220a9d5504ef2f062e123044551c640","type":"artist","uuid":"2bf167cf-7249-4896-9a35-bc9fe2565def"}
album: Flight
  type: MusicAlbum
  date published: 2014-04-29