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 0xcdc714791d58689883335ace86eccf161c92e8727f869772110adef45356b544. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a31c5bbc-f181-440b-bd14-16d71c334e68.json and https://artists.proofprofile.net/proofs/artist/a31c5bbc-f181-440b-bd14-16d71c334e68.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Messiah, HWV 56 / Pt. 1: O Thou That Tellest Good Tidings To Zion
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 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 0x21f4ffb7648466e55d04eb751ed55673b978a722407e7b2ff3bb132bfc4c3dbf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSP39847009 — a six-check JSON result.
Messiah, HWV 56 / Pt. 1: He Shall Feed His Flock Like A Shepherd
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8879f0cec80d7b64f4fc23c3f86124ef29ed2845432be8af8e1363c1fc610fd8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSP39847018 — a six-check JSON result.
Messiah, HWV 56 / Pt. 2: He Was Despised
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe136e851f306aad111fab35a48b2d246ce4dafd29567f50ce4e031a241419ea9. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSP39847021 — a six-check JSON result.
Messiah, HWV 56 / Pt. 3: O Death, Where Is Thy Sting?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83014e722c646bae8e1b08570c2ae0afcab3b03371615422e8f076b04dd6822. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSP39847043 — a six-check JSON result.
Elgar: Coronation Ode, Op. 44: Finale. "Land of Hope and Glory"
A Classical Coronation. Music for a Royal Celebration
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2aac0e26ad5ca7febd86c408261ee37a14427bfced6557cf2cc570fe20cc14. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYD8700642 — a six-check JSON result.