David Velasco (born October 23, 1978) is an American writer and editor. He was the editor-in-chief of the art magazine Artforum from 2017 to 2023. He is the editor of Modern Dance, a 2017 series of bo
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 0x7c8514aad03f346f606ef9a79a45af00cd7e777ebc6930eb87e67b5334b86ddc. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/936e2d4c-5b77-4063-a65d-0a5a8983ed93.json and https://artists.proofprofile.net/proofs/artist/936e2d4c-5b77-4063-a65d-0a5a8983ed93.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).