MC Marco
type: MusicGroup
popularity: 3
followers: 19
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x701fcb3c3c3da05ce95b775ccc1610c83ea7dbff0a9e4455b0d4af352bb61c70
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954516
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954516
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a2453bbf-baad-432a-95cb-67bdf98b9919.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a2453bbf-baad-432a-95cb-67bdf98b9919.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a2453bbf-baad-432a-95cb-67bdf98b9919
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T07:04:44Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x701fcb3c3c3da05ce95b775ccc1610c83ea7dbff0a9e4455b0d4af352bb61c70","name":"MC Marco","registered_at":"2026-06-20T06:16:36Z","symbol":"NIM1536987","token_address":"0x21cd8e99620bd46ce8cf98f5e0dead9163472bd1","type":"artist","uuid":"a2453bbf-baad-432a-95cb-67bdf98b9919"}
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 0x701fcb3c3c3da05ce95b775ccc1610c83ea7dbff0a9e4455b0d4af352bb61c70. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2453bbf-baad-432a-95cb-67bdf98b9919.json and https://artists.proofprofile.net/proofs/artist/a2453bbf-baad-432a-95cb-67bdf98b9919.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T07:04:44Z
  text: {"copyright_id":"0x701fcb3c3c3da05ce95b775ccc1610c83ea7dbff0a9e4455b0d4af352bb61c70","name":"MC Marco","registered_at":"2026-06-20T06:16:36Z","symbol":"NIM1536987","token_address":"0x21cd8e99620bd46ce8cf98f5e0dead9163472bd1","type":"artist","uuid":"a2453bbf-baad-432a-95cb-67bdf98b9919"}
album: Heal Song
  type: MusicAlbum
  date published: 2019-04-19