The Karwendel is the largest mountain range of the Northern Limestone Alps. It is located on the Austria–Germany border. The major part belongs to the Austrian federal state of Tyrol, while the adjace
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 0x7ff322d2b0187583fd3c2f332c496f7d4a6e7122d34d69b2ae3f92317c7992aa. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fbd89558-a15f-4cdc-b116-db094f84b607.json and https://artists.proofprofile.net/proofs/artist/fbd89558-a15f-4cdc-b116-db094f84b607.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).