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 0x2598f5685bd09e410139807d93a140c32d1d739c4a4364513ea7ee7ec5ddc78e. 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/6474b467-603c-4b91-a75c-91e6bb3cb223.json and https://artists.proofprofile.net/proofs/artist/6474b467-603c-4b91-a75c-91e6bb3cb223.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Canon and Gigue in D Major, P. 37: I. Canon
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 0x538b05b724409d73f9938433b3c23fb144fd55915782d9d6c6721abdff0f1215. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBAYC8804957.
Greek Passion, H. 372, Act III, Scene 5: This Night I Understand (Manolios, Voice, Yannakos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd5dd85e5eed5dde5dc68f8c80492b42a03b3c8f6ddcf8ea5772dd8e226f627. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ATMA40510947.
Greek Passion, H. 372, Act IV, Scene 2: Then, Winter Arrived (Commentator)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c3e4ece114928f517fdcf42ab8c363ce566419d436233bcd2a17a92548e9b9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ATMA40510955.
Gilles: Te Deum - Motet: Diligam te, Domine
Purcell Edition Volume 3 : Odes, Anthems & Ceremonial Music
Montemezzi: L'amore di tre re (Live 1998)
Purcell : Songs of Welcome & Farewell (Apex)