Ma'soumeh Dadehbala (; April 10, 1942 – January 20, 1990), known professionally as Hayedeh (, ), was an Iranian singer with a contralto vocal range. Known for her wide range of voice, her career span
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc0b75721a307083959f39430b336fa427e308aefae13aaa4654c9dc4c910f9. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0378912-d11d-41d4-887c-be85d948669f.json and https://artists.proofprofile.net/proofs/artist/b0378912-d11d-41d4-887c-be85d948669f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).