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 0x18f194ec037a27f4cedf9a0c6dca06c193b899a1df66980c3341854c1c9b7033. 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/d5d31e96-b04a-45d8-844a-97207963dcbb.json and https://artists.proofprofile.net/proofs/artist/d5d31e96-b04a-45d8-844a-97207963dcbb.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 0x18c1b2b25f9df1b68b40ce1ef644777acf7b1154b53f2ac879202e46c9f53c6d. 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/CZAC91800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe989cdd95dd6feda4583e72cf517ed40f32e841464e08a9ac2ec8d0ca7474b20. 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/USL4Q1759326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef1fe36dd6ecaea4cefb0433239b86d2d08b49e9ab9755ab6663febb44d75fb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CZAC91800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69bc522810153bc1e4353c9550f8106e863f291555bf512dac38c97f3d4a9de4. 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/CZAC91800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3262c1fc62061a8a51a15857f267e92fe51ea529cfe026c7aad07262526afe9. 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/CZAC91800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679298a86806ac86733d80b9bfc2226f53812bd1fb535861ac957290b830be2f. 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/CZAC91800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695041969fe2d825cefe85fe1680b3233a6b0aa9536b08c9f88808377a8c7311. 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/CZAC91800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec622d298cb2e8d7f5499b7be577a4c6f80fd7fb1b6c74a46c5a98e3541bc05. 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/CZAC91800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa643e629c41015f32529af2c7c54702c86d94ee43f282383f5c0558f73ad34e0. 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/CZAC91800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41861a9c69ac6dc8a560bb9b29369bbe1e475dfaa0fa9d16b02c14d4640233dc. 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/CZAC91800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c1b2b25f9df1b68b40ce1ef644777acf7b1154b53f2ac879202e46c9f53c6d. 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/CZAC91800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e0835e12ece7d095c3a368bd3501e66f7acb1bb60b6787f1e1a1966b69eef7. 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/CZAC91800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87ed0b8d7e7a05275dcb768e66f0874ef2abe8b9beb81e160f54d30fa762f5b. 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/CZAC91800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fda3070ed8369eec6897f2193dd0bb25e96cbf7bb118c117b1e47c00b725616. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/CZAC91800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77128d4bb76db4c46a69d1ab13d935244d9c9c0ab97476a9794cdf54712c5328. 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/CZAC91800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17644f9b6d530fc64cdd26470c6148faed02903456c8bbb58b74b8e7f0e9f2c. 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/CZAC91800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c52e75e820df2ec60168b9a560e196e41ddf831ebf0ee194f10f0a9524168a. 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/CZAC91800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463d86930e9a3ae489411b1d0777bf86e684fa4afd06b1ab8ca7bab2c56da758. 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/SKI472200113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df236e510fb5755cfa4918b82efdf71b9198834410d443eef058974a343f6eb. 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/QZYFZ2315422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36083d4b934851cab79fb2dffff376791cfb7b9dd31dee040961f5374e94684. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:11:49Z), 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/SKI472400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83d6a9bda53f148049d7398b18f9043fe850dd0d0fecc3289541a21e4b0a1c8. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCADZ1841759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e97aad1fdac1d82d760fd06023a511a1d32a6db61c19da9b1ce3141b58fb0e. 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/SKG152200305.