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 0xdfd949c84b49debd19088e9958850057440b077fb646e28733b07f906a7a6708. 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/8dd9048c-f3ef-4778-b911-62d3a08674b9.json and https://artists.proofprofile.net/proofs/artist/8dd9048c-f3ef-4778-b911-62d3a08674b9.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 0x2270521ac1a770f0a2791a4fb3fd6806808581aa34140a9eb70a6afc354945a5. 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/QZMZ92102001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe365ba9cbdce73e2740dd5589de1ffebac7f4e7a3121f3cd65b032c10e0ba003. 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/QZNJX2253147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25a315acd9b1449ae64f28c5d2eafc14630cbe6f04a1f1592c94e6d2a6f521a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZNJV2352233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b180b50d1a7f2e0d4a09b4b72df527451566669b7ba751e1ab8f3800ac38a06. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/UYB282311001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69be75ac0e8fe4d27fb87c7289f028c8a5ed840f92049ee292d0657fc0337f7d. 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/QZNJY2504621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b180b50d1a7f2e0d4a09b4b72df527451566669b7ba751e1ab8f3800ac38a06. 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/UYB282311001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1544641b559733698338fc7cb506cbaf7f61bedbdc86c79704d1b6f0d08c15cc. 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/USWL12400549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b2cf91104caf1123b4f1401c8b17f34b5209eb0de75ac29f33f233a79e09b8. 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/TCAHG2380110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50fa3c91065d8fc064eeec9a2c619dec157cd58b153e9f187a42b9081d10643. 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/QZGLM2314230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01806e85ba01801afb548fe035c3f1624fec0e6ec12ec4a046b2faeed0c549a. 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/QZW9N2204452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9862b7803c5cc9f40ae4b0b41883b8f5699165061cfd283412fe0abca73724. 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/QZTVM2426344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bed1045b1923f2412b6762e069e1904053097bd5a5fbbeea19281d474b3ac33. 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/QZTPX2356124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5caa8e54129dfe9ae7d4918553578be51297eedf24122836f6c2c91a33734f8. 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/QZW9K2355432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63026eef36d2e0f99a1bf530c96b763475ec20bd40f61984edb68321243f4e4e. 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/TCAEN1915806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d9e560787f3348ec64812fae613b58f1658fe05ea471cc92fa3f7ee7ac3150. 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/TCAEN1915807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034027cb26f4bb131430ef8d652a0533400e5b6de83c903bc8584048125cafa1. 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/TCAEN1915808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a21208287153b654defcca037292b76c5346975b25846af90706bfb644e817. 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/TCAEN1915809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d2a4b256f11616b4dfef2c7849ad3a582d7cc1473faf6c6dfd8bf46176f712. 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/TCAEN1915817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e615eb6be6bebafd9a4b1750a29d1ce71c4a9a329302a5bf79030e82d60d11. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAEN1915874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1190fcdbe93ffa47e0741d31bf48e53f920a18954e20c0ea3719842e757c19cc. 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/TCAEN1915891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf403833c70a7005bcdaef160692bfbde3e97a1e8ebc7e566f377c92d0fc31f82. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAEN1915896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8964623d4fb2429d0e6de4ac4c77a3be80c0ca06e1c1e12ae9f85961cb8796c9. 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/TCAEN1915900.