Francis Saltus Van Boskerck (October 1868 – November 26, 1927) was a United States Coast Guard captain known for writing and composing "Semper Paratus", the Coast Guard's official march. He held vario
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 0xa637633a21456f037c51d08a5d2c22bf626c95a1efde67c101d2afdea1e2386b. 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/5a2dd365-a978-49b5-9d87-e2c2367238dd.json and https://artists.proofprofile.net/proofs/artist/5a2dd365-a978-49b5-9d87-e2c2367238dd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).