Top Deck may refer to: Top Deck (drink), a defunct brand of carbonated soft drink sold in the United Kingdom Top Deck (horse) (born 1945), an American Thoroughbred stallion Topdeck Travel, a tour co
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 0x87ef347c3e52b830e111c3153420726e7d58dd3dae1d797e20baa6196003c927. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e181cf65-ee29-42c7-b512-6b3d46e33452.json and https://artists.proofprofile.net/proofs/artist/e181cf65-ee29-42c7-b512-6b3d46e33452.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).