Sasan Heydari Yafteh (; born 11 November 1988), better known by his stage name, Sasy (), formerly known as Sasy Mankan (), is an Iranian rapper from Ahvaz. Reuters has described him as one of Iran's m
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 0xbae48be391c130ff9995da49bf074cbdb86b77b1685e11bbba00235750aac44d. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b223e26-a304-455e-8da9-f1f3e8e1ae4c.json and https://artists.proofprofile.net/proofs/artist/8b223e26-a304-455e-8da9-f1f3e8e1ae4c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).