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 0x1db0a2e3f064f9b7a15c716259094cef34db2ecc3db8474abf7f3c03a4d93b04. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/191860cc-6bde-446a-be94-454889cf37ba.json and https://artists.proofprofile.net/proofs/artist/191860cc-6bde-446a-be94-454889cf37ba.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Divine Liturgy (Arr. V. Sharafyan for Mixed Choir): Who Is Lord, Our God
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea887cb1dec066891e15805d7e11c545f59cd009bbe17e9c18b74d05e1f84e5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX2059010.
Divine Liturgy (Arr. V. Sharafyan for Mixed Choir): Amen, Holy Is the Father
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5c9021ed104169b79d43b49489c6a0ee4a27485481ce5a00b2b60a5d3b9752. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX2059024.
Divine Liturgy (Arr. V. Sharafyan for Mixed Choir): Lord, Have Mercy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723bd244c213fc1f4e248243a1c399246ec4da1d81dd0e646216c17494e3c9bb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX2059025.