Densmore is a surname. Notable people with the surname include: Frances Densmore (1867–1957), American ethnographer and ethnomusicologist James Densmore (1820–1889), American inventor John Densmor
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 0x9987bf8ed3a1f355d6e0f5d4b7601e738cdc67987faf1f9ce3915652d7a09faa. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/628ccc4b-b0a4-4a22-8f7d-96f82635ff9e.json and https://artists.proofprofile.net/proofs/artist/628ccc4b-b0a4-4a22-8f7d-96f82635ff9e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).