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 0xa125a9039cad57b1be61f0a4bcf85838ac75a00239b07de2ef48b476bd2f11d9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/535dc43d-00f3-4a46-8fb8-8cd70c5ad201.json and https://artists.proofprofile.net/proofs/artist/535dc43d-00f3-4a46-8fb8-8cd70c5ad201.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Puccini: Madama Butterfly, Act 2 Scene 1: "Un bel di vedremo" (Butterfly)
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 0x127cf13f2ec629c7dbf807b125b019de75176978944572ecdb92c17d80847bed. 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/GBAYC0202599.
Academia Musicale Italiana/Antonio Secchi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba17bf6ff286af6f3ea4bd061aae3a6054164dcef5abf58f136a9c70d40f92d. 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/ITF030200069.
Puccini: Gianni Schicchi: "O mio babbino caro" (Lauretta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f1bba918b8f1e80b904bd1f67d4addf501053c4bc6db5a4c475fbcd412852b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBAYC0202602.
Bizet: Carmen, WD 31: Prélude (Allegro giocoso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122752cd2831d09f6a49d84cff516e66bde589aff1f21f4d647526a543414da0. 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/GBAYC0202604.
Bizet: Carmen, WD 31, Act 1 Scene 5: No. 6, Scène, "Carmen! sur tes pas, nous nous pressons tous!" (Chorus, Carmen, Don José)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba46f8e9a82e465d98129cefe9b8058045c02af423866c77b481c95b9405eada. 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/GBAYC0202609.
Bizet: Carmen, WD 31, Act 2 Scene 1: No. 12, Chanson bohème, "Les tringles des sistres tintaient" (Mercédès, Frasquita, Carmen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b8bc7c0ce6016e0ee78e565737e7a9b2255f34e6f0fe2785cf9235ed4923bb. 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/GBAYC0202611.
Bizet: Carmen, WD 31, Act 2 Scene 5: No. 17a, Cantabile, "La fleur que tu m'avais jetée" (Don José)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec2c0d40a58d4e2fdd11a0296537fe7b840bdaff8ec89cd56ed045188b87e43. 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/GBAYC0202614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982e39888b6889b79dfbbe3d1f2e503903801243126e25d6c1817f4369f1f9c2. 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/ITF030200070.
Puccini: Tosca, Act 2 Scene 5: "Vissi d'arte, vissi d'amore" (Tosca)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af4aae47d48dd2491e35a603b7efe9c7c761fb09be10cede821ddec8755433e. 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/GBAYC0202627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37dda34a5e96eac0f04c492c695bc079ca8d7817cb414c25754f64d5b652d5c5. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ITF030200071.
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
Un te' con Mussolini (Colonna sonora originale del film)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552bb58e853635e0b7e0549fcb1e94d004a9caf6a573c5abdacf7b42d30e2714. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ITF039900414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fae364885fc7518da657f7de616a4f1ea4adcd949ace9e9a2e6edfb3b10706. 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/ITF039900416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47517545a45fefa97b3be76ce8f7840d74727a2031fb4464d2974377fe83fd98. 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/ITF039900419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f2bb382b0b288d6c7aa65d11c65a5859ab1d8e6a59709a4bec0f34bf6f28c9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ITF039900420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f89fc1b2057d048401c90747e4cfbebb85f5cb84584e62ce9c32c0bdb80f9f. 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/ITF039900428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59c4e4ccb8235035ec34ce8ffd882e9cdfb853861aa0c1614597b4310bba722. 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/ITF039900430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bb4b1cb071cac2355013839be0d0b975e58a5f586ae4843b68f0a614bc90c5. 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/ITF039900413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768fe3979eff301461a442509419d07ed34310b35a268c55430d96594d13d7c7. 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/ITF039900423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8273a334508f01e5448ad9b094dcbb97c2853759a858d0b36fa5d3e8ee457f. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ITF039900435.
Nour (colonna sonora originale del film)
Jane Eyre (Colonna sonora originale del film)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4b01031f2de30f435eb520fd014a6fe775c4da725fe9889fe1ad1bb1854dba. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ITF039700385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1067417cd617e9ffd905df58d6f7e1cd071b06d0fbaabbb6fd712a91f675e1a6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ITF039700386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc2037c964834801a07ab01f12418dd22a700621318daa509f8253a5f44fbed. 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/ITF039700387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2102f82a3b8057b5ca9966bc3020072b61215e2a0dee455ad0ba5960d7c06d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITF039700388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f7ab74eeb9445eac48d2fea0f2e2372da67e0fb7131f3b70fb4938e1547201. 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/ITF039700394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3882e7ce809c500957a97ce3d4134b81611f6216f94ae42c1248b87d7f348aa. 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/ITF039700395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9cc8aa262cf53d5e490f9cccbb2732c3f6098837c35475b95848daf98f6697. 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/ITF039700524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4e3554cd1ac4c94c73e63e23362a3ded10129ecc909d9bfc4d4c9e68373526. 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/ITF039700525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fdd2fe8aaf70a8ab48bc9371a8026c4c45ffaff37f2d513942a69f0ff8588c9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ITF039700526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89afd062f8a9e38bc714d3807e5d4c46d89bfc1ef49e4c3d0d5c184d11f1f0b. 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/ITF039700529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0f873f25908b043c429e42cbfc2c04d72a8487f1e0479edfef50148dbbf58f. 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/ITF039700556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3640f4e20948cbb6d02d623d8c81742104487857fb92f21414b83c70f45ba71e. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/ITF039700389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe9e574da6e3a5a82feb0f328722a4299be39020a5f7ccbc793c0aa7e2847aa. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/ITF039700390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96559bd78febb2a4d28dd2a77e0eef45873027ca35698bf3341c270d83e47fc. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ITF039700391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b0dc67d991632e1fa00d2ff078b11a80814e51a61e5a430d0eb1bf048dc9cb. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ITF039700392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2767e5dfd3b5d729322352d2d23fc94e42057fb289f5a2b2a4beaf26afbd74c. 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/ITF039700393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc492c1db96bbacae05739bfb2d4e012bc535c264044d8e773b7f128ebffe78df. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ITF039700527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fa2e32974dedb3ddeb679e84a857b7fe5e73f3c2c98d59d61d89e28ccf087b. 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/ITF039700528.