Mark Griffin
type: MusicGroup
description: Mark Griffin may refer to: Musicians Mark Griffin, American rapper and musician known professionally as MC 900 Ft. Jesus Marc Griffin, American rapper and musician known professionally as Marc E. B
popularity: 10
followers: 16
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x91a8e2325a51dca32d25befb5af9de1dc76aecfdb3b6c245e4d7dd8e12d09f16
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954043
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954043
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3f1084fa-84f7-458b-8561-52bad4a31712.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3f1084fa-84f7-458b-8561-52bad4a31712.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/3f1084fa-84f7-458b-8561-52bad4a31712
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T04:15:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x91a8e2325a51dca32d25befb5af9de1dc76aecfdb3b6c245e4d7dd8e12d09f16","name":"Mark Griffin","registered_at":"2026-06-16T11:35:53Z","symbol":"NIM1039537","token_address":"0xc61a888e613101c8f35e2f70c9b2f3885bfce1ea","type":"artist","uuid":"3f1084fa-84f7-458b-8561-52bad4a31712"}
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 0x91a8e2325a51dca32d25befb5af9de1dc76aecfdb3b6c245e4d7dd8e12d09f16. Chain 2 (Bitcoin): anchored in block 954043 (2026-06-17T04:15:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f1084fa-84f7-458b-8561-52bad4a31712.json and https://artists.proofprofile.net/proofs/artist/3f1084fa-84f7-458b-8561-52bad4a31712.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T04:15:20Z
  text: {"copyright_id":"0x91a8e2325a51dca32d25befb5af9de1dc76aecfdb3b6c245e4d7dd8e12d09f16","name":"Mark Griffin","registered_at":"2026-06-16T11:35:53Z","symbol":"NIM1039537","token_address":"0xc61a888e613101c8f35e2f70c9b2f3885bfce1ea","type":"artist","uuid":"3f1084fa-84f7-458b-8561-52bad4a31712"}
album: White Sleep - Unschuldig in den Tod (ungekürzt)
  type: MusicAlbum
  date published: 2020-06-23