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 0xb8aa33020147529b9986534d8b2c70c1686fa8e88848a532fb00f5e45217e315. 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/8f335e43-69ea-400e-a1bd-0e9ae5a956b4.json and https://artists.proofprofile.net/proofs/artist/8f335e43-69ea-400e-a1bd-0e9ae5a956b4.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 0x0036c22206cb7dfcaab3ad791c367e583a5df710c2dec91a0508b416f5d42bce. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NLT2H2100045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01492c23ee422f897f148ad254afe43fa186b1a274cca5aa1464a1c38b23b105. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/NLT2H2100191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2066985e9de19588ef23313c54be6a3e93aa46b867896b8bff3ba348c10deef. 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/NLT2H2100276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1dbe9c2ea36531747d98c3d58f36c7cb9d34067447798d2427c485ac73e7ec9. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/NLT2H2100405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc234fb74fb9310ceb0636452076acc35fce7aa49b39454ed352907999b25745e. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GX3HH2131350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368e6f4a91ec8a95a97b608ab033a6705db637ee98e2e7722191d080f740d411. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GX4R52165737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ce1e72edffa0caa0f3bb6f960c5fffb746ef2cd09404af7c09f3a3febeaeb7. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:02:36Z), 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/GX3HH2210545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60d096fb9ea1d51e283ee098197405cf335dc39d0519774d2793f6408400f24. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NLT2H2200166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7596a12cfe27e0654ff37ad486a41c501a9ddcdee9e554c7a047ef2e82deab4c. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/GX4R52277615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21e1d18d8fc38efe703eb4bd360181a27cf56e2d3dc25faa3bc3df42846a770. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/NLT2H2200391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3aab188fe634077614007aed7b875f3ecdea18a70ceaebfefde5bd862dba9c6. 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/NLT2H2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b6d46e533bc1fa4f3d1d677b6223240b5d3b30ec7e27368e49184b12c7272d. 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/USA2P2313088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61bfbe627b8e5abfe5597699c96f39f6afa235c8e8e57d9e3cff26751a026b6. 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/QM7282396528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58e675ffcba5a19fbc33db9cc059e8ba4a3fba282f940d24e1cf6b87eaf8442. 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/USA2P2342442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea07c1ed77b0ada01df66baf6d1d94ecb1171e6899eda0fde2593084cec61be. 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/GBKQU2383147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c7f791d842bd01de8a6cb9094073447d8e12670943b552dcd72382dd554f0c. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T06:37:36Z), 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/QMFMG2356220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0439f2985e47eb0e1f748978f49bc03c17f283227876f505dc08c573dbecc116. 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/QMFMG2356224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962590baf9a8cecce71edc9f9493d9794ed0c435f15343571b8c5831f5bdb2be. 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/QMFMG2356226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158421c12176813398f6b7b11623a4559f82af4f18721d70e55bbfd528f6cf5d. 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/NLT2H2400127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5928888bdbff4505dd57c7715bdf0090cae4de5806f7ee71f765525108373a6b. 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/GBKQU2402094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808eb9e68019a64915b03e69be55cecc8c0df18114780c5eef7909eb8366eb3f. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QM6N22457476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d09b2cf56e9842f380f4efcedf913d6d6f3dae47a7e1a7b469f32529f85706. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QM6N22457477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e116a4aac0b0e219e1dfa2aff840b18281bc75a7f1f289b1dba66824f63a177. 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/QM6N22457490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d58a3430b72137f457ad1baeba9eb95ab814dc4d50ec3cb4a73c5de85d60068. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QM6N22457505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fda06ec6ea752ae7c808137d25738159a2d7e185b69dc40e356c1ec3500ea3e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM6P42415814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa740a4cda3a68c205dcc9cf53e6aa3c0d10d1c16c8a1c1d9631395ad91e87235. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/QM6P42415882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9326f8fa4ba4f45c8968ef890e30785a0ac8db128c7f95c98efd799328c35ea. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QM6P42415883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2aaabe1b11a5c1fc1f4797a27886d6dc089e893ae451588b95fd23708bcfcae. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QM6P42496864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fe9d5c3c7185415d179f206ae28d175876bb890123573c63115ae0a52a0ca9. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QM7282468929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de44d1912b27a3e50d5a2d1a73dd67bfbd2edd89a58c6d3b2a34281c52f4fdf. 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/QM7282468930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c255cea4105fb2904ff563b9a9ae2e226079958b48309ae376ca051ac22e77. 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/QM7282468931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd2df115960ff98eefbc2deaa0e4395ddcfa949b813264e68f5fa787943f119. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QM7282469010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16479714c41292fd7bf812d52bafb8306057170318d2055d18d39d297974de9. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:56:47Z), 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/QM7282469016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbbc0c71dd9e39ade94e1d48612fcf9cc62b158996968847442cd57976abd07. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:43:31Z), 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/QMDA72448021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c90e54677edb9f2104e15c6936a783dd585c9911845fa3b0d9e6048f84e787. 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/QMDA72448036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246a3658e66af8745f7642c583d4692ecf9aee24b9fd3f61efc931206933d625. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QMBZ92518084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700dd5aa82b891944857d72bdfbef8c74e1d5f4da246c58dcf77af167a73fcbe. 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/QMBZ92518085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abde8dbbd2e6571e562827c8ef5ebecc83368494597fe380e11c3ebb2a80701. 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/NLT2H2100678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2fc036f40dda3bb31279767dfbcefe102c1e8cc16f80a1bd5e1b8fc0785ea8. 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/NLT2H2400344.