Timothy Asch (July 16, 1932 – October 3, 1994) was an American anthropologist, photographer, and ethnographic filmmaker. Along with John Marshall and Robert Gardner, Asch played an important role in t
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 0xbef79f922b7af74a8e29ed67651f3eb120ea45f2f066cb5e00db4c4e33c16442. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/306a8ff8-8a9c-4538-af11-3291e4e26abf.json and https://artists.proofprofile.net/proofs/artist/306a8ff8-8a9c-4538-af11-3291e4e26abf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).