Al Barr
type: MusicGroup
description: Alexander Barr (born January 21, 1968) is an American musician. He is best known for his time as the lead singer of the Dropkick Murphys, whom he joined in 1998. As of 2022, he is on hiatus from the b
popularity: 2
followers: 25
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb49c3719b982fd83e828707b02827bbfefe8ff8f26e641efaf07b0170dce81bd
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954035
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954035
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3ce1a39e-e5ea-47e8-8953-0ab0bd00061b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3ce1a39e-e5ea-47e8-8953-0ab0bd00061b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/3ce1a39e-e5ea-47e8-8953-0ab0bd00061b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T02:39:28Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xb49c3719b982fd83e828707b02827bbfefe8ff8f26e641efaf07b0170dce81bd","name":"Al Barr","registered_at":"2026-06-16T10:45:44Z","symbol":"NIM1027567","token_address":"0xf1e0d2f5c18753fd6478db5b591b1de427dcbd70","type":"artist","uuid":"3ce1a39e-e5ea-47e8-8953-0ab0bd00061b"}
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 0xb49c3719b982fd83e828707b02827bbfefe8ff8f26e641efaf07b0170dce81bd. Chain 2 (Bitcoin): anchored in block 954035 (2026-06-17T02:39:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ce1a39e-e5ea-47e8-8953-0ab0bd00061b.json and https://artists.proofprofile.net/proofs/artist/3ce1a39e-e5ea-47e8-8953-0ab0bd00061b.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-17T02:39:28Z
  text: {"copyright_id":"0xb49c3719b982fd83e828707b02827bbfefe8ff8f26e641efaf07b0170dce81bd","name":"Al Barr","registered_at":"2026-06-16T10:45:44Z","symbol":"NIM1027567","token_address":"0xf1e0d2f5c18753fd6478db5b591b1de427dcbd70","type":"artist","uuid":"3ce1a39e-e5ea-47e8-8953-0ab0bd00061b"}
album: The Red Balloon (Original Motion Picture Soundtrack)
  type: MusicAlbum
  date published: 2013
album: The Red Balloon (Original Motion Picture Soundtrack)
  type: MusicAlbum
  date published: 2013-12-14