Thud or THUD may refer to: Arts and entertainment Thud, a fictional character in the animated film A Bug's Life (1998) Thud, a fictional character in the animated film series The Land Before Time (
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 0x2d38b81133689ef0b364fbb1caab7dbf7a50a4ce2e7974689c1fd73ec1191c33. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/983f5ce9-3bad-44e4-b81e-50789e97a05e.json and https://artists.proofprofile.net/proofs/artist/983f5ce9-3bad-44e4-b81e-50789e97a05e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).