Hull may refer to: Structures The hull of an armored fighting vehicle, housing the chassis Fuselage, of an aircraft Hull (botany), the outer covering of seeds Hull (watercraft), the body or fram
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 0x7de0bc8ab8b7d019ceb7a0d66c4939ab7dd424176b23946bc6ff0b9bd4e0a408. Chain 2 (Bitcoin): anchored in block 954017 (2026-06-16T23:38:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3613797c-1f73-43af-9fc1-c88740ae7333.json and https://artists.proofprofile.net/proofs/artist/3613797c-1f73-43af-9fc1-c88740ae7333.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).