Brian Cálar
type: MusicGroup
popularity: 5
followers: 416
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xad441c535c55a74a82f3248d65f4387611b4204c20deec611c4c19bd431ab84f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954342
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954342
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/8b0c1b56-b1cd-453f-b9ef-a586577f585b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/8b0c1b56-b1cd-453f-b9ef-a586577f585b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/8b0c1b56-b1cd-453f-b9ef-a586577f585b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xad441c535c55a74a82f3248d65f4387611b4204c20deec611c4c19bd431ab84f","name":"Brian Cálar","registered_at":"2026-06-17T14:09:00Z","symbol":"NIM1419491","token_address":"0x63f215fc60e4eb64c7c6cadbf09e41831ac0892d","type":"artist","uuid":"8b0c1b56-b1cd-453f-b9ef-a586577f585b"}
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 0xad441c535c55a74a82f3248d65f4387611b4204c20deec611c4c19bd431ab84f. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b0c1b56-b1cd-453f-b9ef-a586577f585b.json and https://artists.proofprofile.net/proofs/artist/8b0c1b56-b1cd-453f-b9ef-a586577f585b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
  text: {"copyright_id":"0xad441c535c55a74a82f3248d65f4387611b4204c20deec611c4c19bd431ab84f","name":"Brian Cálar","registered_at":"2026-06-17T14:09:00Z","symbol":"NIM1419491","token_address":"0x63f215fc60e4eb64c7c6cadbf09e41831ac0892d","type":"artist","uuid":"8b0c1b56-b1cd-453f-b9ef-a586577f585b"}
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  date published: 2017-04-30
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