Martin Gantner
type: MusicGroup
genre: opera
description: Martin Gantner is a German operatic baritone. He made his professional opera debut in Koblenz as Count Almaviva in The Marriage of Figaro. He soon after joined the roster of singers at the Deutsche Op
popularity: 4
followers: 10
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x62e025431ee9d4e1e2a4d2098b50a372ec3b454794c6291a754b61ae9aca39dc
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954038
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954038
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3deff3b1-07a1-4b14-94de-af665ddaf16c.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3deff3b1-07a1-4b14-94de-af665ddaf16c.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/3deff3b1-07a1-4b14-94de-af665ddaf16c
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T02:57:22Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x62e025431ee9d4e1e2a4d2098b50a372ec3b454794c6291a754b61ae9aca39dc","name":"Martin Gantner","registered_at":"2026-06-16T11:13:06Z","symbol":"NIM1034096","token_address":"0x1143adc455dc8a19a1470055414b37ed82b61f3a","type":"artist","uuid":"3deff3b1-07a1-4b14-94de-af665ddaf16c"}
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 0x62e025431ee9d4e1e2a4d2098b50a372ec3b454794c6291a754b61ae9aca39dc. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3deff3b1-07a1-4b14-94de-af665ddaf16c.json and https://artists.proofprofile.net/proofs/artist/3deff3b1-07a1-4b14-94de-af665ddaf16c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x62e025431ee9d4e1e2a4d2098b50a372ec3b454794c6291a754b61ae9aca39dc","name":"Martin Gantner","registered_at":"2026-06-16T11:13:06Z","symbol":"NIM1034096","token_address":"0x1143adc455dc8a19a1470055414b37ed82b61f3a","type":"artist","uuid":"3deff3b1-07a1-4b14-94de-af665ddaf16c"}