"Invictus" is a short poem by English poet William Ernest Henley. Henley wrote it in 1875, and in 1888 he published it in his first volume of poems, Book of Verses, in the section titled "Life and Dea
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 0xaa613f800051e5aee43f1778270f9bbe196e3154b88bd2874100ae92792ffa7f. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3395b97-5299-4e45-8ec2-c3e976f77911.json and https://artists.proofprofile.net/proofs/artist/f3395b97-5299-4e45-8ec2-c3e976f77911.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).