Dercio Marques
type: MusicGroup
popularity: 4
followers: 1329
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  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
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfe263343ca251e88dcff2f4ea552ccbe23823cab6ef8da01377f2e61d8f29d. Chain 2 (Bitcoin): anchored in block 953843 (2026-06-15T22:27:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0055bc13-3dd0-467b-a3da-f234b287c9e9.json and https://artists.proofprofile.net/proofs/artist/0055bc13-3dd0-467b-a3da-f234b287c9e9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T22:27:31Z
  text: {"copyright_id":"0xdbfe263343ca251e88dcff2f4ea552ccbe23823cab6ef8da01377f2e61d8f29d","name":"Dercio Marques","registered_at":"2026-06-15T13:41:49Z","symbol":"NIM0725880","token_address":"0x23d285570cd4a2fd969c8eefd2938928f087bea5","type":"artist","uuid":"0055bc13-3dd0-467b-a3da-f234b287c9e9"}
track: Canto Dos Ipês Amarelos

Canto Dos Ipês Amarelos
type: MusicRecording
duration: PT4M3S
duration ms: 243360
explicit: false
by artist: Dercio Marques
by artist: Dandô - Circuito de Música Dércio Marques
in album: Dandô: Um Canto Em Cada Canto do Brasil
  type: MusicAlbum
  date published: 2015-02-07
isrc code: BRTRB1300434
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
additional property: ProofProfileEvidenceStatus
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additional property: TokenDeploymentConfirmed
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additional property: BitcoinTime
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subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e02bd27b467f1703e9f3b797279393a124920ec129a4abaf0322753286c99c4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRTRB1300434.
  date published: 2026-07-02T11:34:59Z
audio: Canto Dos Ipês Amarelos
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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  additional property: Key Name
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  additional property: Mode Name
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