Anthony Roth Costanzo
type: MusicGroup
genre: minimalism
description: Anthony Roth Costanzo (born 8 May 1982) is an American countertenor and opera director. He began his career in musical theater at the age of 11. Costanzo is a graduate of Princeton University and of
popularity: 17
followers: 2483
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe144a817408bae46f0d0468a2218b534efea2754b24f2c1b375ce1fe5db4d1bc
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953657
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953657
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4fbf95ff-fdfd-48f1-9ac4-59d1562ab290.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4fbf95ff-fdfd-48f1-9ac4-59d1562ab290.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/4fbf95ff-fdfd-48f1-9ac4-59d1562ab290
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T16:43:25Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xe144a817408bae46f0d0468a2218b534efea2754b24f2c1b375ce1fe5db4d1bc","name":"Anthony Roth Costanzo","registered_at":"2026-06-14T12:48:17Z","symbol":"NIM0457739","token_address":"0xf921ad8f9e587d8991990a99335f820838b0c01e","type":"artist","uuid":"4fbf95ff-fdfd-48f1-9ac4-59d1562ab290"}
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 0xe144a817408bae46f0d0468a2218b534efea2754b24f2c1b375ce1fe5db4d1bc. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4fbf95ff-fdfd-48f1-9ac4-59d1562ab290.json and https://artists.proofprofile.net/proofs/artist/4fbf95ff-fdfd-48f1-9ac4-59d1562ab290.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T16:43:25Z
  text: {"copyright_id":"0xe144a817408bae46f0d0468a2218b534efea2754b24f2c1b375ce1fe5db4d1bc","name":"Anthony Roth Costanzo","registered_at":"2026-06-14T12:48:17Z","symbol":"NIM0457739","token_address":"0xf921ad8f9e587d8991990a99335f820838b0c01e","type":"artist","uuid":"4fbf95ff-fdfd-48f1-9ac4-59d1562ab290"}
album: ARC
  type: MusicAlbum
  date published: 2018-07-06
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  type: MusicAlbum
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  type: MusicAlbum
  date published: 2022-01-28