Mark Sebastian
type: MusicGroup
popularity: 3
followers: 127
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xeb34f8dea1084dc640c26874c5f6c29705801c6c98ed6dc6d8330303f013da8b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953907
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953907
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/17905d6b-c3a4-4e94-81f8-ba134d6b2a84.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/17905d6b-c3a4-4e94-81f8-ba134d6b2a84.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/17905d6b-c3a4-4e94-81f8-ba134d6b2a84
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T07:39:24Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xeb34f8dea1084dc640c26874c5f6c29705801c6c98ed6dc6d8330303f013da8b","name":"Mark Sebastian","registered_at":"2026-06-15T21:49:58Z","symbol":"NIM0842335","token_address":"0x56ec4ce3768652a8a33c4ff09fcbaf696a9cacc3","type":"artist","uuid":"17905d6b-c3a4-4e94-81f8-ba134d6b2a84"}
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 0xeb34f8dea1084dc640c26874c5f6c29705801c6c98ed6dc6d8330303f013da8b. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17905d6b-c3a4-4e94-81f8-ba134d6b2a84.json and https://artists.proofprofile.net/proofs/artist/17905d6b-c3a4-4e94-81f8-ba134d6b2a84.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T13:28:01Z
  text: {"copyright_id":"0xeb34f8dea1084dc640c26874c5f6c29705801c6c98ed6dc6d8330303f013da8b","name":"Mark Sebastian","registered_at":"2026-06-15T21:49:58Z","symbol":"NIM0842335","token_address":"0x56ec4ce3768652a8a33c4ff09fcbaf696a9cacc3","type":"artist","uuid":"17905d6b-c3a4-4e94-81f8-ba134d6b2a84"}
album: Bleecker Street
  type: MusicAlbum
  date published: 2008-01-01
album: The Real Story
  type: MusicAlbum
  date published: 2014-04-19
album: A Trick of the Light
  type: MusicAlbum
  date published: 2025-04-02