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 0xf4379214041bb1856b206951e2b641cff20e062f120ff2e3abdd03556ca5278e. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a4b26f1-d567-4339-b628-6363674ee083.json and https://artists.proofprofile.net/proofs/artist/9a4b26f1-d567-4339-b628-6363674ee083.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Don Giovanni, K. 527, Act II, Scene 11: Non mi dir, bell'idol mio
Orchestra del Teatro Carlo Felice di Genova
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 0xb15831657b7dbc0731ff80ac2f60c9555a523a5b1e45a6f753544376e825e328. 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/USSM12109478.
La bohème, Act I, Scene 1: Si. Mi chiamano Mimi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ca90a70375d927f4c045c4e1c1a013a6adcb1f07384e3888b0201297bd4006. 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/USSM12109484.
Rusalka, Op. 114, Act I: Mesícku na nebi hlubokém (Song to the Moon)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a447848cbfe3d9d950dae6c2e4f00b028fb9bc53a1a6a2807760f4e400085d. 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/USSM12109486.
Il trovatore, Act I, Scene 2: Di tale amor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae86773bc420c9c197397aea7a3dd9129db3fc567b858f40aa73c8a37395e28. 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/USSM12109490.
La traviata, Act I, Scene 5: Sempre libera
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eaa5b5e7a9d1f41eb17d0544ba8af8253a97c1ab890a531c0e72472e05eac3a. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USSM12109473.
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
Les vêpres siciliennes, Act IV, Scene 2: Ami, le coeur d'Hélène
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a106d4ec5edc270978aac8b56d5b8f8e49c65074fe5f7ef78cea9645cd7885. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USSM12109474.
Don Giovanni, K. 527, Act I, Scene 13: Or sai chi l'onore
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37288cace50c14ec950a262eeeeb7078260691de36d437ab0dcc678c879f6b9. 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/USSM12109476.
La bohème, Act I, Scene 1: O soave fanciulla
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815e228259bacd9b2230db0823db854131e8b439aae3e8afe6cc9f3b92709fa4. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USSM12109485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f14b6f2f60b10670674a61cd7ba0b5177f0c1efb15c470745f085ca066d5a0. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USSM12109489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c562c1d5b5d489fc87d6bbcd443ae567cd3ea86c34ef2814fce9f6e8d4fcc8. 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/USSM11914909.
Rusalka, Act I: Mesicku na nebi hlubokém
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924a3282a4fe61d17387784899556e7b8dcd2e79a2e0588a3773c9bb03034efc. 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/USSM11914912.
Madama Butterfly, Act II Scene 1: Un bel dì vedremo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77c01bf8bd3d8f9491a1334c8019a1970a1f3883b323b7b537c1dc3678c6eb0. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USSM11914914.
Opera Arias (Soprano): Ptassek, Cornelia - Traetta, T. / Mozart, W.A. / Cherubini, L. / Verdi, G. / Puccini, G. / Strauss, R. / Chaslin, F.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e2d24e3db3c68fca15bb56ad7eaa4ab7b48d8ddc644250f7bbdd1e5f58a0af. 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/GBAYC1302295.