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 0xddf458585f6d6bc1d8dd8270189a131cc9bfd98e5287d29b287f3fe342ba4e94. 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/60ae0214-b054-4d80-90ca-0eaaccb152ec.json and https://artists.proofprofile.net/proofs/artist/60ae0214-b054-4d80-90ca-0eaaccb152ec.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 0xa6292a8288ff36a4eb0e20c910ab566cbc15d0f71a54e217dd9d07cdd140f1e8. 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/USA2P2345016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ec16007c8e55ccc20ee4d447bf8d5ea5dd209ca4a169bcea4cece4dc1d691f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDQH2259564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af34eea23e577ade35f703134d96a87ccb1cd78d280d3fc8dd20f725c1b2e9b. 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/QZDQH2259565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f0a1770944b1dcf3f804a37079eceb89770598c722f9ffe511096f54f8ed9c. 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/QZDQH2259566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9188a163f875c3e6c9204678fb2abc7e0136cb4947e2f31ad21f7571ea0e086d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZDQH2259567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6108d7041fdbea8c55df12256af6efcccee3e51c00e85f1f56c82b716763dd80. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZDQH2259568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb3a8343da687b66cb335b007f4f472c5d4aac5174190a6cf11fad86df1d85f. 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/QZDQH2259569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2d84fa10f58334dc9288eb922c36fce6a36bdc70a45abc435c485ed3d62a24. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZDQH2259571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68981f23994c9aadfcd2d07b2b5b5917107d52c7a1ee55a540e8f2c67a34242b. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZDQH2259570.
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 0xf3ec7c7f4f4b56e5a7e8cd49257d0a1b7127c4f9068cba306ecdf6ecc59c6bca. 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/BK4DA2430269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265b2040d0bda17cdffe9a48a7f1ce7ca83366b4ea9b6de9af06bd5c2a43fd59. 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/BK4DA2423859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab97432638e0bcf559e5e139bf0901c3448165c53eb7cd1f5d5d1c661acc9e0a. 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/BK4DA2409942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3693528282019ae406e420a43888a4acee906460054411be2d572d0ca873b029. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BK4DA2326494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a53858cb7bcf171cebb5ca3e09edfd59e5994a779a6e697f5f3f92aa44fcde9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNJZ2347804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc537603220b367947253b26c94c1f47e5cded78b8f2dc0dc569e70116151269b. 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/QZDQH2371042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3590f19c7a30dc25fddeab3c1f4fe2ae4c5218598cdd3625568f19a89ec204ac. 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/QZDQH2369307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb27ff71d28ec1a3a0e2da3208008d474b42eead75beec942d3bbc174ac89be. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZDQH2367843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1692347319b4f389d299e503b2816deaf8de2eaa695903b5db4606de631d8ca8. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USANG2283732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cacb8f5dab7e2e3e1e6309aea4b56aa5dd6232a4a18e15311dc421726845621. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZ5AB2314576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e62d3220ee8eb4f97453b823cb595cbef20dc6c62e17ce4d2ea4721978e481b. 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/QZW9N2230980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c86b574293cd6a6827fc2c073345726ede83225e150abc45e7b3240a4d872dc. 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/QZW9M2291095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813cb9f8b398428bc9459505e3b28b58f52b6ea301bcddb21d30ad7a49f9bdc5. 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/US3DF2230898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4719584ba14c4de8d7cb8a6d1352d76298806f5af2e926118cbf47452785799. 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/QZW9K2240727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4149d5cf99baf6a11fa66f2c69cfc40c2863d4fa32f61a99ac021cb248bc79e8. 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/QZW9K2240728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4db4327ceb183fdbca05ddd207e6f169039537615103a6e0f84bbf4498a9f6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZW9K2240729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5491067730b30687a3f059110a341c880905b89e4de0912b6d4c14e859ffa23c. 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/QZW9K2240730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450f27531efffb17e46f900d1c3d2d742bd1dc0bbed9651007c6431f2fc1a486. 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/QZTVM2280654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38482e66be12a1795564f783e9a38a2958deca34506db24746263dad965909e5. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZNJY2274157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e070aa70739aa0a64b9bde444690ad87c48b78d51e6e0e73b038dad4c0c54fe. 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/QZNJW2265260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9e44c7a0e2d6ce00e10fceea0f67a7df75db020a3dd0c5e793fb7c88153292. 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/QZHZ52200833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc489613f9ac010ab5455555c409d3b61a7a6abfe76a9ec1aae2ecaae622205f3. 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/US3DF2222334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55573c3cfd04272837cbf617d305dc8ffd5578611a33724c6cebb445965463c2. 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/US3DF2222335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea6a2bebdf1f5ecf2b6859c0d7f8bfe2214827ead3dcd68f4e00cf7db1285c0. 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/US3DF2222337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48de5a1f96c7e81db6072599d3d3f11331fefde0bd01688ec2d170675d4e13d5. 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/US3DF2222338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf363c6112c5ee38c486b06b74bc8fff868180d54da16ca37eaacbbc50cb6e124. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US3DF2212505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f36cc92b9ee02b0adaf27a1b619743cc5dec3e0af0a0013c77503bf41770f4f. 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/US3DF2203375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6db1a298a58196a0257590cd1f817ddde476c8af5e74e2c1b7c9d65fed210a0. 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/QZTPX2187071.