Tystion (English: Witnesses) was a Welsh language hip hop band from Carmarthenshire. Background In 1996, MC Sleifar (Steffan Cravos) and G Man (Gruff Meredith) got together and released a few casse
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf138d921bf7e1ff5b93b8392cca4a00ef7ff5ee6590cfb0381130e6a3484b3a. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/16dac8a9-48ab-4b69-8571-aea7ec3bfcb6.json and https://artists.proofprofile.net/proofs/artist/16dac8a9-48ab-4b69-8571-aea7ec3bfcb6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hen Gelwydd Prydain Newydd (New Britain's Old Lies)