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 0xdffd00aa10385b41ffea1454928f00f9cd8db4524969e30653219bb1228c1680. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e6561c3a-004a-470a-981e-5d9a6d767e0c.json and https://artists.proofprofile.net/proofs/artist/e6561c3a-004a-470a-981e-5d9a6d767e0c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Die Zauberflöte, K. 620, Act II: No. 9, Marsch der Priester – Dialogue. Ihr in dem Weisheitstempel
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 0x58a94ede71d081111567f54264632fd6cb294f121e0282121b9a43aebd88159a. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/GBF079041916.
Die Zauberflöte, K. 620, Act II: Dialogue. Eine schreckliche Nacht
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7930fb8b2ac1df199692d04349644c5a3ad5a93b7c7f1dd854cd1b1676e5af1b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079041918.
Die Zauberflöte, K. 620, Act II: No. 11, Bewahret euch vor Weibertücken – Dialogue. He, Lichter her!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85a7e8aa68b17f7c66792463012443b6ba5abc5db6bab6c7a2033abd2de4afc. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBF079041919.
Die Zauberflöte, K. 620, Act II: No. 12, Wie? Wie? Wie? – Dialogue. Heil dir, Jüngling
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5681046eb2ad74ad5d4c8286b801e6176109c5ee0bcdc2c318ede2169a6bd936. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBF079041920.
Die Zauberflöte, K. 620, Act II: No. 15, In diesen heil'gen Hallen – Dialogue. Hier seid ihr euch beide allein überlassen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5501eaa3ab2fd5953896bfe1b7cf975aea8c76c164dabeb79c0ca3515598a2a5. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079041923.