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 0x9a7f50da3496ecc2769bd44dd727641f65c7240d9e3345dc21ce4e8789920642. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90d72306-f3f8-4dac-a2a4-28f68772d7dd.json and https://artists.proofprofile.net/proofs/artist/90d72306-f3f8-4dac-a2a4-28f68772d7dd.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 0x85f0d240394f2f041528335605006d7c76bd4e4d787adcf91a2398a5bb6ecc5f. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/GX89G2338027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c12dd1fd549feab1cfdfac7e757a9ab73a89445870f71033fc4b0bcf1afe99. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:41:34Z), 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/GX89G2367966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9d2c061d04974103d68a50ad5252ee8c708d72ed3fe153b950b0813bd8b1f0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:24:41Z), 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/TCAJP2519269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197596ac548fca7ee072494e53b82224c476634a8b89febb8252fd75fc9cd11f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAJO2519278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fef0f404541f5bd7b293d8984578c11040e8ff43342ac6c439da4f10337149. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:26:15Z), 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/TCAJO2519297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c03017206a408355f1dd1707c3a73dfb6cd4efef3d6a861e148325c84217852. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/TCAJP2519331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec481d1f4540c75334e39ce15467ec261eabf4f153582a7e8d5fd89012a4b5b3. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/TCAJO2519343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13aa0d136944c3bcd3a4e6bbcbfb20d248a7bfa744d7fcf119c07d8d6ec995dc. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/TCAJO2519349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c6d7daa39cb855d72e343ffbeb340822295191cfe0d1cf5c31b4ad18c8d93c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJO2519354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbba65caa3eae46398fd1fccce7867d6407bacfede6d72f8722603dcc147f66c. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/TCAJO2519360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7066454f77466b5e6412fd5c1e3198bf51bbe11210210d4083c51acf0a56a8d1. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TCAJO2519393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9de3ca5c71f50b195cc558c1153f74539e321fa733e0c5f52c39bbfc0183e16. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/TCAJO2519404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4858aefadee98c49a625d8d6d515131524df22a06f8bad463590c15f4abc916. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:54:11Z), 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/TCAHZ2469959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f2019d30dc11b1df8b7ae28052680adefdbe6bc928fa6685b20b9be82d12e1. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAHZ2469968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60d263eda9112e6a93ed6e621b94373c807dbc0c19d7e82b23ddaab916fc8e5. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:03:51Z), 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/TCAHZ2469972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6374fea0271eebbbba60a6ec7bfc131ccba63e31d2b8cb7168ae6ca2bc3f9f. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAHZ2469979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6db4d2246d5c558e585393afe3c031d5e9ca4cf216af8da8babd9bb1a1e97b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAHZ2469986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ff6bdff07de2d78dd8d542e6cda7c447ce40b3d285184815c2959180bc838d. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:54:44Z), 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/TCAHZ2469995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c08d91d9625806f430122913077fadab55a1f4adeac07e472a8b703ea8ac443. 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/TCAHZ2470003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba862a8e3528d305af3d90c26fa68e42937a4d20d7ead7c00300d1beef1ec8e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAHZ2470009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3997740a5fcf962ac411487ac13e65313208f82514535d21f6c3716664bca9cf. 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/TCAJD2581153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7672d763d4f4181995ad8e2b65e6cf8a43d45835c43f31b10906aaf87de14cd4. 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/TCAJR2552269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6732f44633520f91d2dbc6be87f6e8b9d2417b25ffd75b561f71539a811fa54d. 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/TCAJW2593924.