Käthe Recheis (11 March 1928, in Engelhartszell an der Donau – 29 May 2015, in Linz) was an Austrian children's literature writer. She was the recipient of an Austrian State Prize, an Austrian Decorat
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 0x5e2d0f24474098d155c5ad30973aaad8ad8461958ffd1cd597b477a988e23c2b. 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/6ef3f085-2801-490e-897a-63a49eb5de22.json and https://artists.proofprofile.net/proofs/artist/6ef3f085-2801-490e-897a-63a49eb5de22.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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