Margaretha Anna (Bibi) Dumon Tak (born 21 December 1964) is a Dutch writer of children's literature. After completing her degree in Dutch Literature, in 2001 Bibi Dumon Tak began her career as a chil
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 0x7576d6d8ff72297fcb6e059988a9ac1bc517579b0ded6102bc4fbf67d4ac38f6. 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/4ffb144f-5ccb-48d6-a3da-6c0c94ca5b38.json and https://artists.proofprofile.net/proofs/artist/4ffb144f-5ccb-48d6-a3da-6c0c94ca5b38.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kuckuck, Krake, Kakerlake. Das etwas andere Tierhörbuch (Ungekürzte Lesung)
In een groen knollenland [Een schotschrift tegen de jacht (Onverkort)]
Regenwurm und Anakonda (Was Tiere über sich erzählen)