Marcus Ehrhardt
type: MusicGroup
popularity: 6
followers: 205
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xed08935b54144b8631396f8008bb1de872f089042c29b1831ccfb93c5bf839e3
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954580
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954580
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b5f674df-b9ac-47a6-b5c1-10015340d140.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b5f674df-b9ac-47a6-b5c1-10015340d140.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b5f674df-b9ac-47a6-b5c1-10015340d140
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T17:48:00Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xed08935b54144b8631396f8008bb1de872f089042c29b1831ccfb93c5bf839e3","name":"Marcus Ehrhardt","registered_at":"2026-06-20T14:44:41Z","symbol":"NIM1633988","token_address":"0x79d6164ed9fdd6f424f83782250c0b961fce8abe","type":"artist","uuid":"b5f674df-b9ac-47a6-b5c1-10015340d140"}
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 0xed08935b54144b8631396f8008bb1de872f089042c29b1831ccfb93c5bf839e3. Chain 2 (Bitcoin): anchored in block 954580 (2026-06-20T17:48:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b5f674df-b9ac-47a6-b5c1-10015340d140.json and https://artists.proofprofile.net/proofs/artist/b5f674df-b9ac-47a6-b5c1-10015340d140.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T17:48:00Z
  text: {"copyright_id":"0xed08935b54144b8631396f8008bb1de872f089042c29b1831ccfb93c5bf839e3","name":"Marcus Ehrhardt","registered_at":"2026-06-20T14:44:41Z","symbol":"NIM1633988","token_address":"0x79d6164ed9fdd6f424f83782250c0b961fce8abe","type":"artist","uuid":"b5f674df-b9ac-47a6-b5c1-10015340d140"}
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