Aage Birch (23 September 1926 in Søllerød, Denmark – 13 February 2017)Dødsfald - Drage-legende og OL-sølvvinder Aage Birch was a Danish competitive sailor and Olympic medalist. He won a silver medal
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 0x75166bc448bb7468aaef949baf134132bc9cec6dc33569f72649a92d0dbf1ccf. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c98c7c99-5dcd-4144-a002-a24afe455086.json and https://artists.proofprofile.net/proofs/artist/c98c7c99-5dcd-4144-a002-a24afe455086.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).