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 0xd7443f04e39f2c6da0c877f20e1554f1d0b43478e031f8992c502f4792b0f77f. 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/1461ef7e-99c7-473b-8eee-ebe1824b4915.json and https://artists.proofprofile.net/proofs/artist/1461ef7e-99c7-473b-8eee-ebe1824b4915.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 0xdc82cf17a85359ff3d37ea28a8d16f4445cb00f8a63478c2d3673522dda43daf. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZFZ42525501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947646796b194a2cb4627ac37663761d1d7d64b3a3c3a70060b7cea81b0feaac. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFZ42513288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a53926ea81b6cf08bdf12b93396701a57d68fa1529ff80da80b4811ac23dc1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFZ42513289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02dd78abbf4d2057439e45a9ec69bd2cb4178341048cdadb49823b6a95997198. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZFZ42513290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef12d8c0c5572230cf8abcea324c46c547ba826d553825f9dbf4eb851763f43e. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:37:18Z), 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/QZFZ42513293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8f7e2c9d20865e21d08d0b66c3968b5132a8f61a193c6d4f7e2fe7d7274255. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFZ42513294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2e58aff6065e70eb3873bab311b68dea683431e7894c250ed1524426de7a6c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTAY2413863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d0b1786b91ea00fb56729446e38e7fae724957acae6bc752af3c7e8369f69a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTAY2413864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7592e8bbb8d57ecb39dcf3147caade9e854552ee8be2c52bd4a8c6596a755d0c. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:03:25Z), 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/QZTAY2413865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80832a54d3a207a2e66fbf6a34017a4c64e73779cf46e2b5ec04f376f658d8e0. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:04:44Z), 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/QZTAY2413866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a630d0e9378e4426c72c16fb4b20ab0fd24eb37cb6e92b671d713783537de4. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:25:13Z), 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/QZTAY2413867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d4612fcda68e044a4a5a43f19e635d438293f44856d3f6151a5043bf50e5fc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTAY2413868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ec0bd879ad70cb6b4deac93b3bea25357059490a16e563d52c21c6315e2164. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:20:01Z), 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/QZTAY2413869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac289a34feb4a53d8a1493ff9afed5dc6bc1b274079afe473ea57108def6e7f. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:53:49Z), 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/QZTAY2413870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc599ab1cfbe7c6e00b8f852ce796411d536c2ed927ba219e42e7dee3045689. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:06:48Z), 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/QZTAY2413871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd03d3c976ee93889b0fdda499827e60899f4f3bcc6317cb1a45062340fde51. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:33:05Z), 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/QZTAY2413872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181c7259affa03866cf0604d314287a5a09368bfb9303b86d91a4bc95efc2330. 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/QZFZ42513298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0486c553f7e8e987351dddd9278d35412d5bdcab6b41d763b92fc2e56677dd0. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZFZ42513300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683299468f419789e2967551c24d8aa0f6cbb3f84512f0c74f7aa87b655962f5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFZ42513287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ac45ca78248f28b761c2b558da6cb09a9da110cb9f208e4045ef8e8d7eeea3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZFZ42513296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2e30a71e661387c14b368ed5790a8f8869dc454913ced99fcd3a18ef97fcab. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:23:27Z), 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/QZFZ42513297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269ed9f93e28fb2169e987d60c0eb507a59971b925a3adce63ae6cff39cb0ffa. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/QZFZ42518769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca369ace12ef1364027268d46cd35f2454d1125a0ee1fb5c6256fa9f8886ff9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ42516535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ec74ca5aaf0d8f10d59b3a2b2328e559218059741050236dca81a4349194ac. 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/QZFZ42513295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a192b2aa95c1da542420b6e454da0555d9b717732a3ffb1d57843665b6e2ad0. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZFZ42513299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1f28a3d4d38dbafc3d7c2186bb84a87e6055fa26f6b9850c50623e070afb91. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFZ42513291.