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 0x0668629b37537f6a1cd717a2cf82adbc8745bba01aa8dbdf0b6c3f62f832980a. 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/c50354e9-3f24-4729-86e0-ffe6adf1f25b.json and https://artists.proofprofile.net/proofs/artist/c50354e9-3f24-4729-86e0-ffe6adf1f25b.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 0xb77e95ccbd1875975b49beddc18373588715d478b2d89d30209e8d62f6881d4a. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:44:29Z), 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/QZDA51826328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4599a1a529dd457d508175c3fd1132b91ce3330737b987ce0ac002347dac4fc4. 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/QZDA61916693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25f9594949d134162d1f0fff3afe0a7777987ac1064ed2698a00950f32c00af. 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/QZDA41965707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0faee1a43ecfdfaade589d4a70fc1a7f788ddfc81833e79137f9178c81baf0. 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/QZFZ31928662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9267cc4f5964f45074b07f2117b5c31982efaf03ff259868f76d432e1bfd3396. 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/QZFZ31969119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd1186d15d17a0a3741ac551f8b34b0c9c2606b2b3f3e7f08fee96c5b8b895b. 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/QZHNB1906411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053137b5782b00e421984de0d99a04023e647bef85a489340759259dbb515820. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZHNB1906423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15dcf6f68bcd9f4f6e9463242563abc163eead3e8bc68362ca83ba00f9c0d888. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:04:07Z), 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/MXUM72005574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25a01d8fdb29891bd49da9ac814a753028c6f42a92945279887671e9b1e1cfd. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:54:29Z), 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/MXUM72100840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5d61d1a56eb2051b3df9ca15c3817c0e55ac8c060728f1f1e5901971a9915d. 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/MXUM72001416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f948ed0f17834128c68f251c8cc99d8b3cbf5ef19efa7db8de7e945af1ead6. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:59:21Z), 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/MXUM72101381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3833f46406f39e6e53450edd7e0261ee1ee24918f73c790a9f928059f75323. 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/MXUM72002355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15dcf6f68bcd9f4f6e9463242563abc163eead3e8bc68362ca83ba00f9c0d888. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/MXUM72005574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80464a63bf2f48c61e44be7c377cffdcf8c7e603008c1f993e117d44feff49a. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/MXUM72201124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8184b2b65177f92bd5f836089a4be23e2fa5d86a6bf82cacfb9b41567188a9f5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/MXUM72301422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37113f20cc9cc15643f74da9c1fe374b88a42e895e01e1ad2e46a5d587d09b6. 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/MXUM72301427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ffac6d0490989e2aa2c48ecc471eecc925e9b74e11d53d9d5051b2ae42b6e0. 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/MXUM72301428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f5b6f8b428cf50fe35f5fee1be4ccc08a2fe1da964c69f0c86e62d85b4f313. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/MXUM72301431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7daac4098ab8043dbcf9eaf0d9b356e2c6e98daccea682b0eb60bbb57b90dec7. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/MXUM72402874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52caf0d9b6165434317796710d93af3e53a3dff068f57844af0b3215ebfab8ca. 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/MXUM72402933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55979abc4e1b876d231d63340cd6d5854a44d1395299cc2a26d5bfda49f3dcd1. 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/USUM72010003.