Marquee may refer to: Marquee (journal), journal of the Theatre Historical Society of America Marquee (overhang), a secondary covering attached to the exterior wall of a building Marquee (structure)
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 0xa3f0659c4fd5f4c2df3835cf2ebda81c2ba53a833d962c11357a15b3c0e542e2. 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/3674c99d-0b39-4e9f-a94b-6d1cccec242e.json and https://artists.proofprofile.net/proofs/artist/3674c99d-0b39-4e9f-a94b-6d1cccec242e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).