Headless may refer to: Science and technology Medicine Acephalic acardia, a type of twin reversed arterial perfusion in which one twin is born without a head Acrania, missing cranial bones 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 0x02cd42260cb4586567af2dff77421441f3184931734f5e3b37834749ab507870. 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/727dfdef-92b5-44a7-a8bc-d2d2ae99d5d3.json and https://artists.proofprofile.net/proofs/artist/727dfdef-92b5-44a7-a8bc-d2d2ae99d5d3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).