In Welsh mythology, Olwen (or Olwyn) is the daughter of the giant Ysbaddaden and cousin of Goreu. She is the heroine of the story Culhwch and Olwen in the Mabinogion. Her father is fated to die if she
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 0xbc1bf542be65594578d3dcb8698d00cda3986b41b0e54688c1a958b176e480ce. 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/6f809bca-102d-47db-927d-2338d970bdcb.json and https://artists.proofprofile.net/proofs/artist/6f809bca-102d-47db-927d-2338d970bdcb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).