Maria Del Mar
type: MusicGroup
description: Maria del Mar may refer to: Maria Del Mar (singer) (born c. 1966), Canadian rock singer, and occasional actress Maria del Mar (actress) (born 1964), Canadian television and film actress María del Mar
popularity: 2
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2c7e88f0f74ba4d7e4a7943bb79c27e30fb3be6214eab957e85aadaba4f860d1
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954587
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954587
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bb1a69de-5811-494e-8403-3d961cd3cfcd.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bb1a69de-5811-494e-8403-3d961cd3cfcd.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/bb1a69de-5811-494e-8403-3d961cd3cfcd
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T19:10:41Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x2c7e88f0f74ba4d7e4a7943bb79c27e30fb3be6214eab957e85aadaba4f860d1","name":"Maria Del Mar","registered_at":"2026-06-20T16:55:29Z","symbol":"NIM1659637","token_address":"0xec1a07e4fa36a95d6f00a0ff56c29d46c819ee5d","type":"artist","uuid":"bb1a69de-5811-494e-8403-3d961cd3cfcd"}
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 0x2c7e88f0f74ba4d7e4a7943bb79c27e30fb3be6214eab957e85aadaba4f860d1. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bb1a69de-5811-494e-8403-3d961cd3cfcd.json and https://artists.proofprofile.net/proofs/artist/bb1a69de-5811-494e-8403-3d961cd3cfcd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T19:10:41Z
  text: {"copyright_id":"0x2c7e88f0f74ba4d7e4a7943bb79c27e30fb3be6214eab957e85aadaba4f860d1","name":"Maria Del Mar","registered_at":"2026-06-20T16:55:29Z","symbol":"NIM1659637","token_address":"0xec1a07e4fa36a95d6f00a0ff56c29d46c819ee5d","type":"artist","uuid":"bb1a69de-5811-494e-8403-3d961cd3cfcd"}