thumb|upright=1.5| thumb|upright=0.75|The of the Kingdom of Bohemia was the first (dollar). Dollar () is the name of more than 25 currencies. The United States dollar, named after the international
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 0x7df28fbff4cd6c463b31debce849212a27c9748935a7e80980516bc6515c2c55. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ae502f4-f3b6-49d4-a2be-a3607180712c.json and https://artists.proofprofile.net/proofs/artist/4ae502f4-f3b6-49d4-a2be-a3607180712c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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