Marek Majewski
type: MusicGroup
genre: sea shanties
popularity: 4
followers: 318
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x64506dfb946a4c043bed305c672a758c7ba42d20deb716b10426c1d55986f80c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954065
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954065
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/38343c35-6639-4584-939e-01c608917532.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/38343c35-6639-4584-939e-01c608917532.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/38343c35-6639-4584-939e-01c608917532
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x64506dfb946a4c043bed305c672a758c7ba42d20deb716b10426c1d55986f80c","name":"Marek Majewski","registered_at":"2026-06-16T09:08:24Z","symbol":"NIM1004339","token_address":"0xa316afb0d8dc3e808c270fa602a115282f2e978d","type":"artist","uuid":"38343c35-6639-4584-939e-01c608917532"}
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 0x64506dfb946a4c043bed305c672a758c7ba42d20deb716b10426c1d55986f80c. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/38343c35-6639-4584-939e-01c608917532.json and https://artists.proofprofile.net/proofs/artist/38343c35-6639-4584-939e-01c608917532.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:10:43Z
  text: {"copyright_id":"0x64506dfb946a4c043bed305c672a758c7ba42d20deb716b10426c1d55986f80c","name":"Marek Majewski","registered_at":"2026-06-16T09:08:24Z","symbol":"NIM1004339","token_address":"0xa316afb0d8dc3e808c270fa602a115282f2e978d","type":"artist","uuid":"38343c35-6639-4584-939e-01c608917532"}
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