Almen is a village in the Dutch province of Gelderland. It is in the municipality Lochem, about 7 km east of the city of Zutphen. It was first mentioned in 1188 as Almen, and means "settlement near e
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 0x2f6a2c815d7117b9c4ade52635047d864e637f6f1c5a370939c86e811a9f092a. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96f253f4-1b4f-4721-ae12-87b0e5e5c403.json and https://artists.proofprofile.net/proofs/artist/96f253f4-1b4f-4721-ae12-87b0e5e5c403.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.