thumb|330px|The largely 5th-century interior of Santo Stefano Rotondo in Rome A martyrium (Latin) or martyrion (Greek) (: martyria), sometimes anglicized martyry (: "martyries"), is a church or shrine
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45d43566cdb1f27846c560aca18eca0905a8fe1b60095acdedc4d0f6188d0fd. Chain 2 (Bitcoin): anchored in block 953877 (2026-06-16T02:39:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0384b89a-0e77-4d5f-9e71-2003bd7cb8d6.json and https://artists.proofprofile.net/proofs/artist/0384b89a-0e77-4d5f-9e71-2003bd7cb8d6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).