Christiaan is a Dutch, Flemish, and Afrikaans male given name. An archaic spelling of the name was Christiaen with "ae" to indicate the long sound "a". People with the name include: Christiaan van A
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 0xd23355d3133505c0914ba3ae4661fb789de447726615ae6d417222eb48cf55a4. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dfc694a9-b681-44fc-b77f-a153ccd9f0f1.json and https://artists.proofprofile.net/proofs/artist/dfc694a9-b681-44fc-b77f-a153ccd9f0f1.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.