"Zaddy" is a song by American singer Ty Dolla Sign. It was released on August 25, 2016, as the third single from his ninth mixtape, Campaign (2016). The song was written by Tyrone Griffin, Jr., Jay Cu
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 0x0fc689dc22253b317878c6545e6ba0ab378a9cc4348cfbda9c3c75bbabfb5ff3. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd48b906-5d00-4ae6-a442-f4b95f3fa3f3.json and https://artists.proofprofile.net/proofs/artist/dd48b906-5d00-4ae6-a442-f4b95f3fa3f3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).