C. Kramer
type: MusicGroup
popularity: 3
followers: 9
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x448144c8208f81ba565089b2c10ecd01a4734bf15bfc8d19d9e1d3a31bc7836c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954533
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954533
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a3be54b0-184e-4aaa-9564-b35836bffa60.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a3be54b0-184e-4aaa-9564-b35836bffa60.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a3be54b0-184e-4aaa-9564-b35836bffa60
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T08:57:02Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x448144c8208f81ba565089b2c10ecd01a4734bf15bfc8d19d9e1d3a31bc7836c","name":"C. Kramer","registered_at":"2026-06-20T06:42:47Z","symbol":"NIM1544120","token_address":"0xfe77941f2cb3f951d0a0873c6dfc5d36079735d6","type":"artist","uuid":"a3be54b0-184e-4aaa-9564-b35836bffa60"}
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 0x448144c8208f81ba565089b2c10ecd01a4734bf15bfc8d19d9e1d3a31bc7836c. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3be54b0-184e-4aaa-9564-b35836bffa60.json and https://artists.proofprofile.net/proofs/artist/a3be54b0-184e-4aaa-9564-b35836bffa60.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T08:57:02Z
  text: {"copyright_id":"0x448144c8208f81ba565089b2c10ecd01a4734bf15bfc8d19d9e1d3a31bc7836c","name":"C. Kramer","registered_at":"2026-06-20T06:42:47Z","symbol":"NIM1544120","token_address":"0xfe77941f2cb3f951d0a0873c6dfc5d36079735d6","type":"artist","uuid":"a3be54b0-184e-4aaa-9564-b35836bffa60"}