Masen (, also Romanized as Māsen) is a village in Alqurat Rural District, in the Central District of Birjand County, South Khorasan Province, Iran. At the 2006 census, its population was 48, in 26 fam
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 0xa942e791ddbc44ac89bd582265912fa196e34f34a03ddffe6f503c25c6c96de0. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e7bebcf-5ea9-4b7f-8af4-86a57d5f85d9.json and https://artists.proofprofile.net/proofs/artist/9e7bebcf-5ea9-4b7f-8af4-86a57d5f85d9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).