Mark Lach
type: MusicGroup
popularity: 4
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x73224b894669d22bec082f08c9f50d5900d75a879134eca2a96e6e3ed83dd8d4
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954035
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954035
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3be52319-d926-47bd-8393-703415ce7a22.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3be52319-d926-47bd-8393-703415ce7a22.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/3be52319-d926-47bd-8393-703415ce7a22
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T02:39:28Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x73224b894669d22bec082f08c9f50d5900d75a879134eca2a96e6e3ed83dd8d4","name":"Mark Lach","registered_at":"2026-06-16T10:27:36Z","symbol":"NIM1023245","token_address":"0x7093011b061e403ed0253393fe0d6fac8dbb3482","type":"artist","uuid":"3be52319-d926-47bd-8393-703415ce7a22"}
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 0x73224b894669d22bec082f08c9f50d5900d75a879134eca2a96e6e3ed83dd8d4. Chain 2 (Bitcoin): anchored in block 954035 (2026-06-17T02:39:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3be52319-d926-47bd-8393-703415ce7a22.json and https://artists.proofprofile.net/proofs/artist/3be52319-d926-47bd-8393-703415ce7a22.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T02:39:28Z
  text: {"copyright_id":"0x73224b894669d22bec082f08c9f50d5900d75a879134eca2a96e6e3ed83dd8d4","name":"Mark Lach","registered_at":"2026-06-16T10:27:36Z","symbol":"NIM1023245","token_address":"0x7093011b061e403ed0253393fe0d6fac8dbb3482","type":"artist","uuid":"3be52319-d926-47bd-8393-703415ce7a22"}