Alessi's Ark is the musical project of Alessi Laurent-Marke (born 30 June 1990), an English singer-songwriter. Career right|thumb|Alessi's Ark performing at Heaven, a London nightclub, in November 20
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 0x431f77a4f59fdbabbe4032498e61af6d3c06f59d535aeac34f22c46cfdebb450. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c024d78-74ed-4c48-a0ed-9c0395deeb20.json and https://artists.proofprofile.net/proofs/artist/4c024d78-74ed-4c48-a0ed-9c0395deeb20.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).