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 0x361ca680b2732bd28fcda96e17cb256e12bedbe03ad9dac35f02ac948e660c98. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75479ab0-8274-4855-bc41-390f075a5636.json and https://artists.proofprofile.net/proofs/artist/75479ab0-8274-4855-bc41-390f075a5636.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).