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 0xa5c72c0120963fdc247608809736aa195bd4177b381c9ee491bc601dff912974. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd637807-c517-4015-ac73-822b44e656f6.json and https://artists.proofprofile.net/proofs/artist/cd637807-c517-4015-ac73-822b44e656f6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Parsifal, Act I: Nun achte wohl und laß mich seh'n
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 0x2401a96ed40fad328490ed7dc252501bc5cde1483dce4215b33892dbdd30fec4. 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/DEF057030911.
Don Carlo*: Act I: Introduction and Chorus: Su, cacciator! (Hunters)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf631e749cb4c5e5f4ce1feac89f974acfd7186ccbefe50b694fa5932f22a7a01. 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/HKI190238301.
Don Carlo*: Act I: Narrative: Fontainebleau! foresta immensa (Don Carlos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba39e3e82d9c0558efd080970d88da246ea4e5db33ed21205dfda595065ea297. 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/HKI190238302.
Don Carlo*: Act I: Romance: Io la vidi e al suo sorriso (Don Carlos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd44e2fb4a1d1385ecfc7fe6dd1abf67e24880af26811745f045b440c65cc18. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/HKI190238303.
Don Carlo*: Act I: Scene: Il suon del corno (Don Carlos, Tebaldo, Elisabeth)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b60cc9a0dfaa6cea2781693bae794bce21a43323a73319dde15bc7986ca5481. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/HKI190238304.
Don Carlo*: Act I: Duet: Che mai fate voi? (Elisabeth, DOn Carlos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029df9131c447433b3cd64c3b1d8cb45061cf4899e3b3120e80682e720efaba0. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/HKI190238305.
Don Carlo*: Act I: Di qual amor (Elisabeth, Don Carlos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0597d3cf93ea0c08bc6734dc8ca05d5e2c145e6cba00a7cfd9fd554e1ff5b1ea. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/HKI190238306.
Don Carlo*: Act I: Scene: Al fedel ch'ora viene (Tebaldo, Elisabeth, Don Carlos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c069b2e4c107970a7595d6a939cc13201f3bafc66d250bafdd7ed7249c4405f. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/HKI190238307.
Don Carlo*: Act I: Finale: Inni di festa (Elisabeth, Don Carlos, Count of Lerma, People)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca2e0d5de2446da4779a2bc11f1a350633dca6280453cc7021940e922d7ca2a. 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/HKI190238308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341c158676e817036cdb278bce9ebe32e1f03c67b36293878e0b138cd4a29c37. 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/HKI190238309.
Don Carlo*: Act II Scene 1: Scene and Prayer: Carlo, il sommo imperatore (Old Monk, Monks)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618a31080a8aa1029a35b9f67e11ea6f82ba63a5790708de0225cd3bb5a24961. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/HKI190238310.
Don Carlo*: Act II Scene 1: Scene: Al chiostro di San Giusto (Don Carlos, Old Monk)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620e5b3f9db6d137d5391a8c69e21ac05be1fb91e009ce3f1275f3cc3fdccd53. 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/HKI190238311.
Don Carlo*: Act II Scene 1: Duet: E lui! desso! l'infante (Rodrigo, Don Carlos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18be923f82c775d765f829f5d0c85e3c19ab1893186422bac94cab91e41c6a3f. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/HKI190238312.
Don Carlo*: Act II Scene 1: Dio, che nell'alma infondere (Don Carlos, Rodrigo, Old Monk, Monks)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5177b68ee544c6c615d4f9a2a6d61be3d27f25b47b6bd39b5a9984cbc51e8b17. 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/HKI190238313.
Don Carlo*: Act II Scene 2: Chorus: Sotto ai folti (Ladies-in-waiting, Tebaldo, Princess Eboli)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319165b2e1556b452eca712230791cfd26eee9863ab189fd011f8baf3c455a31. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/HKI190238314.
Don Carlo*: Act II Scene 2: Veil Song: Nel giardin del bello (Eboli, Tebaldo, Ladies)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1e80195e6158019d723bfb172edd9c0a094b718ff08dded201dab677d21789. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/HKI190238315.
Don Carlo*: Act II Scene 2: Scene: La regina (Eboli, Elisabeth, Tebaldo, Rodrigo, Ladies)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad99a17fc46afe9fcb6742a3dc92c04a40eefda6e76d96921939bbc45a966c9. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/HKI190238316.
Don Carlo*: Act II Scene 2: Romance: Carlo, ch'e sol il nostro amore (Rodrigo, Elisabeth, Eboli)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c095b7bf967b0b62368b3f84c1a83981a03d6820eb5579e9d116273ed39842. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/HKI190238317.
Don Carlo*: Act II Scene 2: Duet: Io vengo a domandar (Don Carlos, Elisabeth)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7cc271dea4d2d2c6ef635017bc4c2c9b98fd1ba097d741d8aa62e5ff729dcb. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/HKI190238318.