Alex Mar
type: MusicGroup
description: Alex Mar is an American journalist, writer, and documentary filmmaker based in the Hudson Valley and New York City. Her work often centers on religion, belief systems, and subcultures. Her books inclu
popularity: 19
followers: 93
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4ac1d69fc422c713cc7b490bf334cd332d49f85c57c7b0f61612b2918bf2bc8e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953777
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953777
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/cc3d2c66-a252-4b87-9809-56b5aa92a18b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/cc3d2c66-a252-4b87-9809-56b5aa92a18b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/cc3d2c66-a252-4b87-9809-56b5aa92a18b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T11:52:51Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x4ac1d69fc422c713cc7b490bf334cd332d49f85c57c7b0f61612b2918bf2bc8e","name":"Alex Mar","registered_at":"2026-06-15T02:04:56Z","symbol":"NIM0647856","token_address":"0x473bbd207ccd6fd0173359281336460bbb623771","type":"artist","uuid":"cc3d2c66-a252-4b87-9809-56b5aa92a18b"}
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 0x4ac1d69fc422c713cc7b490bf334cd332d49f85c57c7b0f61612b2918bf2bc8e. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc3d2c66-a252-4b87-9809-56b5aa92a18b.json and https://artists.proofprofile.net/proofs/artist/cc3d2c66-a252-4b87-9809-56b5aa92a18b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T11:52:51Z
  text: {"copyright_id":"0x4ac1d69fc422c713cc7b490bf334cd332d49f85c57c7b0f61612b2918bf2bc8e","name":"Alex Mar","registered_at":"2026-06-15T02:04:56Z","symbol":"NIM0647856","token_address":"0x473bbd207ccd6fd0173359281336460bbb623771","type":"artist","uuid":"cc3d2c66-a252-4b87-9809-56b5aa92a18b"}
album: Hija De La Lluvia
  type: MusicAlbum
  date published: 2022-04-05
album: Canción de Otoño
  type: MusicAlbum
  date published: 2025-05-16