Keesjan van der Maas
type: MusicGroup
popularity: 2
followers: 43
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf8796f3b568102838851efb1a7f51b26b930a5a932013a2ba6daa9a3919b6032
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/79af1d12-04ec-4eba-a8f0-2525d6f036f0.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/79af1d12-04ec-4eba-a8f0-2525d6f036f0.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/79af1d12-04ec-4eba-a8f0-2525d6f036f0
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf8796f3b568102838851efb1a7f51b26b930a5a932013a2ba6daa9a3919b6032","name":"Keesjan van der Maas","registered_at":"2026-06-17T07:56:59Z","symbol":"NIM1330850","token_address":"0xb61a7bb790eebce26708cd03ef6c8664357eecef","type":"artist","uuid":"79af1d12-04ec-4eba-a8f0-2525d6f036f0"}
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 0xf8796f3b568102838851efb1a7f51b26b930a5a932013a2ba6daa9a3919b6032. 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/79af1d12-04ec-4eba-a8f0-2525d6f036f0.json and https://artists.proofprofile.net/proofs/artist/79af1d12-04ec-4eba-a8f0-2525d6f036f0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0xf8796f3b568102838851efb1a7f51b26b930a5a932013a2ba6daa9a3919b6032","name":"Keesjan van der Maas","registered_at":"2026-06-17T07:56:59Z","symbol":"NIM1330850","token_address":"0xb61a7bb790eebce26708cd03ef6c8664357eecef","type":"artist","uuid":"79af1d12-04ec-4eba-a8f0-2525d6f036f0"}
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