"3 Libras" is a song by alternative rock band A Perfect Circle. The song was the second single from their debut album Mer de Noms. The song was well received both critically and commercially, with it
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 0x152f195b664f83ee69a55f5cf1c502fa73d56a899d7125faa499c4fb6e9e8455. 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/4f23b1ba-090c-4975-9f4c-f282330d4a4b.json and https://artists.proofprofile.net/proofs/artist/4f23b1ba-090c-4975-9f4c-f282330d4a4b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).