Sully may refer to: Chesley "Sully" Sullenberger (born 1951), American pilot notable for landing his disabled airliner on the Hudson in 2009 Sully (film), a 2016 film by Clint Eastwood about Sullen
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 0x291d021f9646bd05c8d1615f4050a6c2eae106d62fe15c3ce67e40eda40754be. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b919a42f-1e6f-4aa8-97b1-2cf62b76ea3a.json and https://artists.proofprofile.net/proofs/artist/b919a42f-1e6f-4aa8-97b1-2cf62b76ea3a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).