Sketchy may refer to: pertaining to one of the uses of Sketch (disambiguation) Sketchy (album), a 2021 album by Tune-Yards Sketchy Andy (Andy Lewis, born 1986), performer and extreme sports athlet
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 0xe6742222a2143c5c245b0b19c317d110995158026c8e242d9fca851a23dc42dc. 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/5b9961cd-6009-4fb4-8c91-7cdbba2a516f.json and https://artists.proofprofile.net/proofs/artist/5b9961cd-6009-4fb4-8c91-7cdbba2a516f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).