Selina Chönz or Selina Choenz (4 August 1910 – 17 February 2000) was a Swiss children's author. Her most famous work is A Bell for Ursli, a children's book illustrated by Alois Carigiet. thumb|Swiss c
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fdde6c2d73e2fdc187b81328a0259c862c0750f2ca1a29722ccb90368f8730. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/98f0d06c-266f-4679-9a76-46105fa60c15.json and https://artists.proofprofile.net/proofs/artist/98f0d06c-266f-4679-9a76-46105fa60c15.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).