Mc Calla
type: MusicGroup
popularity: 10
followers: 33
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5f553f314289a036cb88f6eac9254ab7b36856bbdefddc654520edfe9eefe921
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953959
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953959
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/277d19b3-5117-4ead-8b0c-4fb8990c8fca.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/277d19b3-5117-4ead-8b0c-4fb8990c8fca.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/277d19b3-5117-4ead-8b0c-4fb8990c8fca
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T14:51:55Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x5f553f314289a036cb88f6eac9254ab7b36856bbdefddc654520edfe9eefe921","name":"Mc Calla","registered_at":"2026-06-16T03:22:22Z","symbol":"NIM0921700","token_address":"0x9e092206ec9752207d1f048fc28391203cfcf0d1","type":"artist","uuid":"277d19b3-5117-4ead-8b0c-4fb8990c8fca"}
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 0x5f553f314289a036cb88f6eac9254ab7b36856bbdefddc654520edfe9eefe921. Chain 2 (Bitcoin): anchored in block 953959 (2026-06-16T14:51:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/277d19b3-5117-4ead-8b0c-4fb8990c8fca.json and https://artists.proofprofile.net/proofs/artist/277d19b3-5117-4ead-8b0c-4fb8990c8fca.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T14:51:55Z
  text: {"copyright_id":"0x5f553f314289a036cb88f6eac9254ab7b36856bbdefddc654520edfe9eefe921","name":"Mc Calla","registered_at":"2026-06-16T03:22:22Z","symbol":"NIM0921700","token_address":"0x9e092206ec9752207d1f048fc28391203cfcf0d1","type":"artist","uuid":"277d19b3-5117-4ead-8b0c-4fb8990c8fca"}