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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 0xbebf9c9c05416671f4c3a53e613723cea282e66cbbc7e5e3b7f776b4597cc5df. 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/77900a74-4ef3-48a3-afe0-a74b9e6e2cbb.json and https://artists.proofprofile.net/proofs/artist/77900a74-4ef3-48a3-afe0-a74b9e6e2cbb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x75793150c9f431a391d93efecb441f6a195805415b950c787e1bfd3c575167c8. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZDA61936134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43648fdd3bf4b51599340a18f8595044371c5761d9379b823bca86538f96b22. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZHN41937266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde798334e3f06e9729e3f4b6377ac74ee149270caf5b36d816535f62f593b3e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHN41937267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e46ec0bf55e788f7376bd4960d2e76b6ac5b628b4031beb3b1d117c7cc5272. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:05:13Z), 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/QZHN41937268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61fe02dde81dd5681c3e423e6fa40ca46e33a2b21379167b83f2e56e00a2a7d. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZHN41937269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbda7bf373a21de3b48ecd845a8df997edbc375a843120e52896710040970adb. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:07:21Z), 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/QZHN41937271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5de2244e014ea51d1bff275eed5e8ed091e82ccd566da293b3bc5c9822c7d1. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:43:51Z), 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/QZDA62009919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa19be3d2a82daa9df6287ad641a5e17e22a33f3a1e5e7d5bd04c17ad673c0f4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHNB2009388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86502ae8e18170da1b9b9202b73ecb6ea7d2ad8431b4ba236bec5c7d8e54af95. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHNB2009389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27848fad112c15efcde9caa7587e2aeb31ebd15de0a0b6ff004b36a6a9a20eb0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHNB2009390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6055de9386e72b4827b87dc2a4f0daafeb971babc175d8e30cad4cc869f1b13. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHNB2009391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d8565453fd43b7d057f8608838261521c14254673000aeb7c34b6808544e2a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHNB2009393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d028c72458f11c4c15ea3d5ec8a8dfdd053c603a7de8f8c7219e025f141d599. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHNB2009394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fab666de5647b74f226fcd658d9919e61f743d301500319db856e4e86a3781d. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:05:17Z), 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/SKA012100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73afa93ebc15dd94cc8501c8327f46d90a4be8b8997fd6c1980257f2b74f3752. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/SKA012100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a14a2463073dbdf69d3dcb3da2fd1e88c82b81f634ceee98bc091b5b46e797c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SKA012200260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc672a9db61bd55ef1691efde69e239820e086418f019508becc18da0777ede8b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SKA012200261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98291966cfbf2dbcb819780acef81f0f8dd590edc059da072dd8df14a82529c6. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/SKA012200263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5599287b75970fccec50bd6a2386d98b5c01890aad856ed992043a97d567e00c. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:01:46Z), 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/SKA012200269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766e5c6ed18895d05b5a095eca683063c795062e744c036e6066b3b541235be9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SKA012300311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef83f0f3f99766256ef524ae6c797b4c1e16449cecdc5998d76180a439750f1. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:09:35Z), 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/SKA012300312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3caf9ea11af2cae155ba0188193126ed0e46c6f64f7dc1b61039205733db5684. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SKA012300313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232a3f98834d0ccd8345a5c4d35f67991f661676d5005bf78a49909201427f12. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/SKA012300315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ab803b987213c442ef1497102cc8ea2c1d01fac08731e924aa6f4fe6c69a0c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/SKA012400123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf7d29e889788323f41258ce042da5b3fabf9e04afa81413f471ec16e171151. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CZUM72300447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5d777a03abce8dbce3b4fe2bd0da9683bf4699b374f4dfc198f8a0239561a0. 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/CZUM72100076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56520872e23243b88c6b66fb769acbc4faa30bf5d43342b2ff3488adfa217d3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CZUM72000783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56520872e23243b88c6b66fb769acbc4faa30bf5d43342b2ff3488adfa217d3. 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/CZUM72000783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b380aabd04bd5cd7df21626d71da63172a402b127bb617513caff48c8cb5b3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZZ662348211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a177fb97baf3367ddc257c19e5f02049cf113e89b53c860524e1043a1b4f4b7. 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/CZUM72100934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a177fb97baf3367ddc257c19e5f02049cf113e89b53c860524e1043a1b4f4b7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CZUM72100934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff943c82b43d2267a612003ca9cc07bd0ac2a47ab7f07f5c2bd8eeda1963ee6. 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/CZUM72000161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e448741bcf722504bca3a87b07f53a639e704006a2b81b99fb1b08a3e755eb. 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/SKA012400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafbb93473bc82a0e648b72e0989c5aad2a4ca79c588bd9daca2dafb66d4703c. 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/QZWDW2344987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe819e20df752bd06904951d621807174b1a2396f88fdb8c6797f37fbfedf3161. 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/QZNWQ2008819.
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