Nah Traoré - Mariam Tounkara - Pamela Badjogo Mapaha - Mariam Maïga - Ibrahim Maïga - Jules Minck - Alice Minck - Oumou Sangare - Idrisaa Soumaoro
{"copyright_id":"0x0544b6ea55adf7d0790257ad12bf29b08167d5ea3aa4540723a22d471efcc0ed","name":"Nah Traoré - Mariam Tounkara - Pamela Badjogo Mapaha - Mariam Maïga - Ibrahim Maïga - Jules Minck - Alice Minck - Oumou Sangare - Idrisaa Soumaoro","registered_at":"2026-06-17T05:52:07Z","symbol":"NIM1301088","token_address":"0x4c219ed22c781e419f11e3e98538fab4ee324a62","type":"artist","uuid":"7398a480-94b8-4298-8e1b-bde00cf12f9b"}
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0544b6ea55adf7d0790257ad12bf29b08167d5ea3aa4540723a22d471efcc0ed. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7398a480-94b8-4298-8e1b-bde00cf12f9b.json and https://artists.proofprofile.net/proofs/artist/7398a480-94b8-4298-8e1b-bde00cf12f9b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).