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 0xe3bca96c50fb606633387f4399c3bb7c457fa1afe8781d9d86b280c3ac25a751. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c859d8a2-8033-445e-a67f-47afd0125501.json and https://artists.proofprofile.net/proofs/artist/c859d8a2-8033-445e-a67f-47afd0125501.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Pujian Sahabat Kristus I: Hai-Hai Sahabat Kristus
Pujian Sahabat Kristus III: Kami Keluarga Allah
Pujian Sahabat Kristus II: Yesus Sahabatku
Pujian Sahabat Kristus IV: Percaya dan Taat
Pujian Sahabat Kristus VI: Kuberitakan Karya-Nya
Pujian Sahabat Kristus V: Jesus is My Hero
Pujian Sahabat Kristus VII: Amazing Stories