Jager is a Dutch occupational surname meaning "hunter". People with this surname include: Durk Jager (1943–2022), Dutch businessman in the United States Eric Jager (born 1957), American medievalist a
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 0xb92404e75754deda1f7b9ecf3c9bbe369695b6e6f8453218213f13c9edba8df9. 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/9c4865f3-da0f-4c13-b87a-bcbaf4a45b68.json and https://artists.proofprofile.net/proofs/artist/9c4865f3-da0f-4c13-b87a-bcbaf4a45b68.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).