Gert Ledig, full name Robert Gerhard Ledig (4 November 1921, Leipzig – 1 June 1999 in Landsberg am Lech), was a German writer. thumb|Gert Ledig Biography Gert Ledig, son of a merchant, spent his earl
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 0xdfe85c03cb912e74aaa9e95ce87d6a04739c7b7b50b8f3d1f2af4702ec05b6b1. 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/6122dfe5-611f-4962-b996-18c0aeecf613.json and https://artists.proofprofile.net/proofs/artist/6122dfe5-611f-4962-b996-18c0aeecf613.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.