Apol is a surname. Notable people with the surname include: Armand Apol (1879–1950), Belgian painter, etcher and lithographer Barbara Gaardlykke Apol (born 1995), Faroese politician David J. Apol, A
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 0x037d4e79001e0fa2740c3a2739afd5c29972fc55c4819870216a6013c6606bf0. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/753dfd12-0271-4b8f-b028-dd744f94e100.json and https://artists.proofprofile.net/proofs/artist/753dfd12-0271-4b8f-b028-dd744f94e100.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).