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 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 0x5ccc9e6954ed0a3287b3516078009e9ba6ad5f36ce38264766e44155ef8e380a. 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/22898f7f-caf2-4d2b-bdd3-8ebb6897c3c5.json and https://artists.proofprofile.net/proofs/artist/22898f7f-caf2-4d2b-bdd3-8ebb6897c3c5.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 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 0xd77f7e2c49710fdca090cb3c32d2214008b4e77faa0bc20f7c5a51d801c7f308. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/GBBYB1000853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441be93e002e06292ed4727d3d75bab3d425f826511d52bd63d134067f05b95a. 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/DELK11400135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bad304c42307a1f09f8dddede953ce6fbfd0623b819678e03d263d0fa72a95b. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/UKACT1550073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d943aa761eaf8a7e68d3df57a19bbd3d85059d1484c75f471cea656ecda5fb9. 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/DELK11000139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf2d94d902a793d755e68f385b6f134c3fe47c02ffb850e79dfd8278cc733a9. 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/DELK11400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c8377c12f37608c2c4e8c23a130ce4a790462612edd8d830d182ce9bfe8a4c. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/DELK11100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccc60ca5e07834be8960a8813c887395f68ff1ba7e7a9049937671e0d0f9e0b. 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/DEH741510152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12ec9566c91706c727e621ae98435481c0505c0d1eab1e37ad895e8fe121006. 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/DELK11700053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43323fc198062d2897fe81c8bb9529657ec815185da91252a779e13de26e3d67. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/DELK11700108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d57a497d74692fb995d8c0088996de52d9624fb35da22b4d25131d19d56d094. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:06:28Z), 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/DELK11700109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cebc0f697cdb8c2972d5ed8cba9778b6cf7a77470f05bd2dc8622417bfdbbdd. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/DELK11700114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cfdc1c03b8d2ebf0f36a445c8c3b4d093ebdb34a62be6630f9a495788433c8. 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/DELK11800153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31b1d92687471879e1868daf6ebd4c3164f34ae54adb2cfdaf58ce0c000f60c. 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/DKZVA2000144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fdf4acbbc16c7b6bbc5d050f2fac04a3892adf2263cbae62f1f74bdc098b43. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/UKU932110580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c0eae61f8eaeaaab2a49c999687acc601174b42d37a7ab6abce97b4de8ca8b. 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/UKR6V2282096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5622211a663504b357769bf585acfff88c8421a0795f76422f7f1ce813f8ffd5. 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/UKR6V2282097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cfe2b64808d71d13a647d2aa01536f369f8629d259926ee81ea2daa6abe0c07. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GBKQU2340361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd65d58760bbfad243ba8480b39c5b07794057dfcd083cfbd1233dded724ba42. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/GBKQU2340362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7289b077dd782f9ef10c9009dbcc7b2e36fcca53a4d794a6ce99e8a940c918. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/GBKQU2340363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eaddfd13f7f2c2a3fb3e45f169c61aae9df5a24a82198bde825b9b01bfe6a3a. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/GBKQU2340364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c0eae61f8eaeaaab2a49c999687acc601174b42d37a7ab6abce97b4de8ca8b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/UKR6V2282096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a57c1a4a36f10c8b1b7707f5f2c3e7ca98a46993638a98cf7a4408e362680f. 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/GBKQU2373173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e649b200f9813e678439648dbc29144dc7b807366de44c97192de186115df9a. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/GBKQU2407648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e14f0a5ba0373f9946714267e1516a7699e13c3187a4ab5e2ef1d19ddeeaefd. 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/UKR6V2440942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2752e7c17e955801dfeef6acb95266d68455a46b913de1044be771d27ce179b. 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/UKR6V2441886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35893f15c316728c1aba5bb63cca2efbd2cb3a3da3fad3f7d8b5c9f5db4a4e41. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/UKR6V2445679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8013dc6d3c8f9d4236be40b56084b2d9413c15252ec41b05dd10be4dcd1b4dc. 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/UKR6V2445591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f174230b08080fd67baf3d839714ccd7d3fe207b2d50504f7f88989cbed50e. 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/DKZVA1160902.