Matt Caplan
type: MusicGroup
description: Matt Caplan is an American actor and musician in the theatre. Career Matt Caplan has released two studio albums and a single. Caplan has appeared on Broadway in Rent as Mark Cohen, in the revival
popularity: 7
followers: 147
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xcb261e4c7691d10d21eb2ef7863d9d8c0a0664645ed5d4376e18a29cc4900893
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954004
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954004
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/31beaf43-ad2f-431b-907f-9ac3466db773.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/31beaf43-ad2f-431b-907f-9ac3466db773.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/31beaf43-ad2f-431b-907f-9ac3466db773
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T21:01:04Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xcb261e4c7691d10d21eb2ef7863d9d8c0a0664645ed5d4376e18a29cc4900893","name":"Matt Caplan","registered_at":"2026-06-16T07:11:31Z","symbol":"NIM0976434","token_address":"0xfbff9f4b3c57eff78c18cf0c9397e9801240e903","type":"artist","uuid":"31beaf43-ad2f-431b-907f-9ac3466db773"}
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 0xcb261e4c7691d10d21eb2ef7863d9d8c0a0664645ed5d4376e18a29cc4900893. Chain 2 (Bitcoin): anchored in block 954004 (2026-06-16T21:01:04Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31beaf43-ad2f-431b-907f-9ac3466db773.json and https://artists.proofprofile.net/proofs/artist/31beaf43-ad2f-431b-907f-9ac3466db773.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T21:01:04Z
  text: {"copyright_id":"0xcb261e4c7691d10d21eb2ef7863d9d8c0a0664645ed5d4376e18a29cc4900893","name":"Matt Caplan","registered_at":"2026-06-16T07:11:31Z","symbol":"NIM0976434","token_address":"0xfbff9f4b3c57eff78c18cf0c9397e9801240e903","type":"artist","uuid":"31beaf43-ad2f-431b-907f-9ac3466db773"}
album: Odd Evensong
  type: MusicAlbum
  date published: 2009-01-01