Anna Grue (born 22 June 1957 in Nykøbing Sjælland) is a Danish crime writer. The most voluminous part of her published works is the crime series about detective Dan Sommerdahl. In addition, she has wr
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 0x38458d1fa36fc8781e738b4c9fbf9f47859c0b9a21d2b3de781f87fcf6c79575. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7541ed75-5829-4a91-858d-24a6d6cc1361.json and https://artists.proofprofile.net/proofs/artist/7541ed75-5829-4a91-858d-24a6d6cc1361.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Die guten Frauen von Christianssund. Sommerdahls erster Fall
Tod im Trödelladen (Ein Hygge-Krimi | Die Hygge-Morde 1)