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 0xe677658a9aaff30bb2753a7423bb914b28e3da29c160579de2d055f521a0bc95. 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/8628d678-4300-4dd9-a6e6-8170024eab28.json and https://artists.proofprofile.net/proofs/artist/8628d678-4300-4dd9-a6e6-8170024eab28.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 0x18915bcb22507f9191409e767fa89adb5e264b56b1230ce1db10e1f8a3194029. 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/NLZ542300541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3eb60831e1803887e7f22449df509577450d125fd17abd1665df2a0eeee680. 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/GX8KD2373466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54afc22599fcea756542b0657dd0cc3f8b22e5429d611beafaa3d64f9058f6d5. 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/GB2LD2210371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711055d28633be8c21e805ebaafb238cccb03eb91d5584ac5ff21b2e0c4b4b2f. 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/GX89G2221709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e90a8ba6f444778973ab8b56b1456f9c8d643dbff1f0e7ca400019a774e7da. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLT2H2200276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80902e7e68ed4783c90674d4af426459570598683eeed460390048e7bc5d14c7. 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/NL2QC2101075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf399898067d18055e71d3c4d708382c5cb468e0e28904d601f4d67ba7732aaaa. 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/SE6I32457187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b56a6ff6d4f62fcc9c0fa13fc2362bbadd29f8268b6b700f7bad7667517612. 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/GBKQU2459470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb328d2726c64b100f6043dee61907fb741bdc5161d78cbf7dba9d16538408bef. 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/USLQ22180739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d73a358e8dbb1aa06489a807a66521947ecdf6233a1a35c1a6f5816e627c716. 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/NLT2H2400416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2aec1d174d2288fc2907eacc801ee1d24f9da32944b1f41b4d3d6b940df2806. 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/SE66N2373971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6136d6ba21ff62cb3cf3c297abe335cbc51a927950eefe1bf14beaf6fd7bfe4c. 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/SE6XY2369482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b011b37585018da014fe315975c2e23ad738dae8574eb811c19c976873b329. 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/USLQ22180609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d8bae9162ab3a750f769e990f93635e6f6267f50825acd9cf48bc4dc9ef959. 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/GX8LD2376719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e25dbd4debf92c9ec1ef2b894720371da33634523f52dae745111d29233d89. 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/NLT2H2201059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8aafaed430a5c3b33aa1c79a617637c5f567c34fbfd01fd4a960e5089999be. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GX8LD2245710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb75b1cf0051ae9735bcffc849d75b3714203cb6b2b61fdc57a2e3cf124dfc20. 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/SE6QE2260856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c289e7e10251506b4a43eade520e604937af448a22ebf582eae518b3049e49. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/NLT2H2200939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e829d8d679dac213ee256d57ebf06e40475521c11a1a1933ae69daca18f09f5. 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/DEPI82502742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f786dc9764482431af1e43d4d587831776b1a8ba52e81b4c2c4cf97b99059f. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/DEPI82502743.
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 0x6b62b1c76e13332390826c5adbdfd467b4d232f2b9421eb7d599848afa328c6e. 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/SE6QE2464467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09038967431d1f1940be1d822ef981b11f2e30c88be775cd040707eaed029c8d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLT2H2401096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33de1cb95df45d213293237b0dcff62df2b1ddcfee3a6113470b85dd9413b305. 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/NLRD52339259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79a34da317a5876dd6666d46ba5b193ca61b5768a6cd7b146a00d512260edb1. 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/SE6I32403915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd97b731c8feacad89db96d56def79413b87f25a773df331c93b492f1722d88. 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/NLRD52339157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cce012c96fd73a917a71d658b58ff9f734ca5897ddfd90c32e68e21155c516. 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/NLT2H2301208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67accb65abb2ed14f2e9effb6772886741a8ee5a3a911061cc3b39d0a338bec9. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/NLT2H2301209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6abf892a50a254784801fbe696503d080b2023edfc45613766f826ecffaa618. 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/SE6TI2377385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f19bb286a8a111a9eee8e333ddf0c317d7090cc29830d0e4f677a97afe6e034. 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/USA2P2345606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1094065fdb4278d4a64bf97b701785651ef8f3e90600307e9c995b64596552f1. 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/NL8NY2300091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec4c50b74046c91dc2a6994f1cf171abdd57c672e7f5031f423ea8e3039bfc9. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/NL8NY2300092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2297f63c68e62664676c21be0bbc0f2b34565ed5ef4fc60eb3a4fe5219824e15. 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/GBJAJ2300737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf626d026e4daedbf629549c87f64e3b7a375f95ec8ca7700a2366dd78605419. 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/CH7812351494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4171fdd357bbf154b101aff20ba3ccba6005e2f84b2bf40d61233cfcdbc203af. 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/NLT2H2300133.