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 0xd1b73e6266865d7789e17f4fcf554e25612ac9cf774a515d5b8bb572aa388a72. 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/783c45a5-b180-44cc-b9f6-eae4a00ac4cd.json and https://artists.proofprofile.net/proofs/artist/783c45a5-b180-44cc-b9f6-eae4a00ac4cd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La Tarara (Cançons Paqüeres Infantils Populars)
La Manta al Coll (Cançons Infantils Populars)