"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 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 0xd8ede1d0e4d8218303b7e5b797dd3127f2e1362ed905d3a7024fdb9229145f37. 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/69960172-b958-4b39-aa75-c90d2f8e43a0.json and https://artists.proofprofile.net/proofs/artist/69960172-b958-4b39-aa75-c90d2f8e43a0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).