Crom or CROM may refer to: Places Crom, a townland in County Fermanagh, Northern Ireland Crom Estate, a Northern Irish National Trust Property Crom Castle Ben Crom, a mountain in the Mourne Mount
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 0x9ab285085739b4a9fe3018eed84336e22a6be7b4fba0840da35aace6c5cc8319. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83906517-c593-4147-9236-4d7dc0d4d70d.json and https://artists.proofprofile.net/proofs/artist/83906517-c593-4147-9236-4d7dc0d4d70d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).