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 0x5967285cf7e9dd6cefef9a6908ad2baf99a512f6e8175638f6bbff1b57647b17. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/85df30bf-6f8f-422a-9b3c-2a84c6895fb4.json and https://artists.proofprofile.net/proofs/artist/85df30bf-6f8f-422a-9b3c-2a84c6895fb4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Verdi: Don Carlos, Act 2: "Dieu, tu semas dans nos âmes" (Don Carlos, Rodrigue, Chorus, Un moine) [Live]
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 0x3e9051da9c15f031d67e7c9229e51c017130fbeced84931927be4298bf777a75. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRZ119600930.
Verdi: Don Carlos, Act 3: "Sire, il est temps !" (Don Carlos, Philippe, Élisabeth, Rodrigue, Thibault, Les moines, Chorus, Une voix d'en haut) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cae61c3aaad5c27294f338825fac22a67a09cd9e3f9ac96393f1425c0b7aefc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRZ119601110.
Verdi: Don Carlos, Act 1: "Le cerf s'enfuit sous la ramure" (Chorus) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ae0fde8bf0be5963f9a90079882673e1736003966331a5474355ff7249b189. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FRZ119600820.
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
Verdi: Don Carlos, Act 1: "Ô chants de fête et d'allégresse" (Chorus, Élisabeth, Don Carlos, Comte de Lerme) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01175cafc8a96b02b749c2935c921c5c4ea3a3e9bfbd52826819dab86ffd60f2. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FRZ119600890.
Verdi: Don Carlos, Act 2: "Charles Quint, l'auguste empereur" (Chorus, Un moine) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a15c9bf1b7d3c62ab02f8e71acf31f5dbf072b3b73da1bc81d7e37d8804c5f4. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRZ119600900.
Verdi: Don Carlos, Act 2: "Sous ces bois au feuillage immense" (Chorus, Thibault, Eboli) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa267515e420fca8ff5e51b27e887788ff90ca533ca78d871aa8d75112e7b3b. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/FRZ119600940.
Verdi: Don Carlos, Act 2: "Au palais des fées ... " (Eboli, Thibault, Chorus) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75c37ddd16a92c2f536ee1b6b1ecec98cdc7f278891a31e311855c366b9ad0e. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FRZ119600950.
Verdi: Don Carlos, Act 2: "Ô ma chère compagne" (Élisabeth, Chorus, Rodrigue, Philippe) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137d97a6fda1c1888f3c132e33103e95d17ca0cf158d081ba4795301a4eb6165. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FRZ119601010.
Verdi: Don Carlos, Act 3: "Ce jour heureux est plein d'allégresse" (Chorus, Les moines, Comte de Lerme) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ec949951ebc16b9d61c1a4e4d3e4734d12af0b579b3314efbab3eb94303e4a. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FRZ119601090.
Verdi: Don Carlos, Act 3: "En plaçant sur mon front, peuple, cette couronne" (Philippe, Chorus, Élisabeth, Rodrigue, Don Carlos, Les députés flamands, Les moines) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacaf0cc29c4c107f68876aaa0e7b746ea7636a1415b78ea6d9ab362c869c053e. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FRZ119601100.
Verdi: Don Carlos, Act 5: "Au revoir dans un monde où la vie est meilleure" (Élisabeth, Don Carlos, Philippe, Le Grand Inquistieur, Un moine, Chorus) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a4da366ac89bd59664c159f33da25853ffdbb2c806050db0d617a26dfe8af1. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FRZ119601260.