Jacob Ludwig Karl Grimm (4 January 1785 – 20 September 1863), also known as Ludwig Karl, was a German author, linguist, philologist, jurist, and folklorist. He formulated Grimm's law of linguistics,
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 0x59b0ec6a63726d16649c218db91ce7c0e5f8f8e12a8bd67683c95355ec3b3ba3. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa56a8b3-e18f-4402-90b4-51ba4b352d27.json and https://artists.proofprofile.net/proofs/artist/aa56a8b3-e18f-4402-90b4-51ba4b352d27.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Jacob und Wilhelm Grimm: Dornröschen und zwei weitere Märchen
Konrad Beikircher liest "Der Tannhäuser" und zwei weitere Sagen
The Complete Fairy Tales of the Brothers Grimm
Die schönsten Märchen der Brüder Grimm, Teil 8 (Ungekürzt)
Der Froschkönig oder der Eiserne Heinrich
Deutsche Märchen in einfacher Sprache (angelehnt an leichte Sprache)