David Lynn Selby (born February 5, 1941) is an American film, television, and stage actor and writer. He played Quentin Collins on the daytime soap Dark Shadows (1968–1971) and Richard Channing on
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 0x41e5cca007db9bf2f220246687b30e23e6e06bd7f48972116f3ff270bac860af. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/26478435-ef2a-40dc-9926-86c3f5a647e6.json and https://artists.proofprofile.net/proofs/artist/26478435-ef2a-40dc-9926-86c3f5a647e6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).