Marcus Rojas
type: MusicGroup
description: Marcus Rojas (born February 23, 1963) is an American tubist from New York City. Early life Rojas was born in New York City on February 23, 1963, and grew up in Red Hook, Brooklyn. His early influence
popularity: 9
followers: 164
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb7aa75bcba0935a36f405edd920a70ee46ec4dfc92f46364542228348e714e36
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954693
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954693
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e4d9b030-2c50-42d6-8e6a-3b541ce6ef25.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e4d9b030-2c50-42d6-8e6a-3b541ce6ef25.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e4d9b030-2c50-42d6-8e6a-3b541ce6ef25
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T11:50:32Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xb7aa75bcba0935a36f405edd920a70ee46ec4dfc92f46364542228348e714e36","name":"Marcus Rojas","registered_at":"2026-06-21T07:50:26Z","symbol":"NIM1867270","token_address":"0x4045cf8bbdd5bdd1ea29249596523742fd6c4a75","type":"artist","uuid":"e4d9b030-2c50-42d6-8e6a-3b541ce6ef25"}
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 0xb7aa75bcba0935a36f405edd920a70ee46ec4dfc92f46364542228348e714e36. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4d9b030-2c50-42d6-8e6a-3b541ce6ef25.json and https://artists.proofprofile.net/proofs/artist/e4d9b030-2c50-42d6-8e6a-3b541ce6ef25.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T11:50:32Z
  text: {"copyright_id":"0xb7aa75bcba0935a36f405edd920a70ee46ec4dfc92f46364542228348e714e36","name":"Marcus Rojas","registered_at":"2026-06-21T07:50:26Z","symbol":"NIM1867270","token_address":"0x4045cf8bbdd5bdd1ea29249596523742fd6c4a75","type":"artist","uuid":"e4d9b030-2c50-42d6-8e6a-3b541ce6ef25"}