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 0x995dbd0e571cc4db055b9121f8e2dc8dcbc57a912e9e9a1db67a34b05bff729e. 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/95e7e02a-350c-4a58-9b20-17c2b66b0f7e.json and https://artists.proofprofile.net/proofs/artist/95e7e02a-350c-4a58-9b20-17c2b66b0f7e.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 0xd6fed955c54f8cdf21a315a206754484daa6562045edc3560d1fef18228c505b. 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/TCABP1355920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5818d5565351e0ab48a71d3d12ba996c7faf15182ee97eeb0bc0c469b89667. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/TCABP1355937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252cd4424f3764ff45abab16851e82ec43fae5e6d87e7ce3599828f3d58ad768. 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/TCABP1352873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5f6a4f06b67a198165f7315fb4a430c6cf70d07b5cfc67c3a586e710362769. 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/TCABP1347879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7029fe104e156785e9c3265d21824a3a8eae637ad3f8beb2dd22ae3c095a2fe4. 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/TCABP1347898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9666550985573ae84780dc6cc832abd5c3af58bfa6ab4a5a01e1b994eaa0dd27. 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/TCABP1347900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d0d62bfacf33c3d70a0d7574f8b01093cd4d8717ae4d8b67e890feddc71aea. 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/TCABP1347926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b799e3dc5c2aa265ce104ebfe53642e55b32ca646782d2ad754c4066ab42a17. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCABP1347985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248eda26b3875138238cc4f3a944885e3bc1af557692f403554345b21d7daa08. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/US7VG1437637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeed293cb6e1acb101695237fda5d8a2da16603ae87acc1114bf3e7cb9c96965. 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/US7VG1437638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a37c5b6f38c86bffe68881e277d65bd2ab184731787958e43ca1242c2477b0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US7VG1437640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7224d9d5e19f026d20ad93eb8f38b46c26943e5e492fd1516ccef0c97cf21f. 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/US7VG1437644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12684a5a0e09fd03c8b8ac396a1ba5dfbec38308ed057c088a2367a3317766fa. 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/TCABZ1473718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2dd9ecd9a677284d1e7fa4a8f5c885b85811673be0b6ee08c5dc504dd60491. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/TCACD1520374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2a9efcd79f5794f2df596b3b4e9c596fcc0ace487b9d533b6b4c44974c8d92. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/TCACD1520397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c71b87ea6e66050f6e16364d8c0876719d591ecae24176c67afe4900f06f76. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/TCACM1608326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5d5443f0dfb6aafff069493de25a1a01781da908f5439ab47045250c9488fe. 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/TCACM1608345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0133ca3cb0075d22e6b8720e0edf638461d88f6ec70413fe4910cb19aa7994. 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/TCACM1608350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f132bb4f8284ae2bc7367eef949460421044e2ee908ae649b35a54af5ec35ea. 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/TCACM1608357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb067aea0f6d751de795f6eea7c95a9a36b0ab253bb64f1b9f04f608c85051e26. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/TCACM1608371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a5fa73161b8d26f9f66b376828e51b19f7b263ecb9cd9d01a8418868fc74d5. 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/TCACM1624123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6501d7db5b7c7ba9bad951a221a10d53e3cf11284d5f8d984642daa2f76f1a7. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCACM1624129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fe0e215b9550b927190d726b8108331e77b4149a21289312c930f647d0e588. 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/TCACM1624139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf803dec8758851fa6312377f3de41cca798ea2c67a86910f993b8308018131a4. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/TCACU1667561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe031d94f474826bfa93ea8edd86704bb28b2764c1a94b29751a0d560bc365ec0. 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/TCADC1704307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aebbc65d7959bef55a061a2238eaaaa6ac23d999a90b5999bde28b531a6fb00. 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/TCADC1732998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2173bb5b9c01a7e5692eac13ddaa3029265bdef4e00fcf69ce148f15c631aba3. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/TCADZ1849651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a35726e926997184ae3ea99b64e3a0ea79d78752f3e907fe2ce3f56d352fe3. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/TCADZ1849697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc918feeddf8ea6943dbe7341396c339d0ef248f1b83e6ac3e6535fb4a063aafe. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/TCADZ1849866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8a32f5ce67ba4a7c3436c612b477aae2c95e8dfdf894b177695b8edf847841. 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/TCADT1897801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212c898b29c484e61cfa07d21accd21d135c05930bb55cba402eb5835be9292e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAEB1995151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c01db83998b80f6c917b0fc6b649f56c168d8469840698687b578f71f346a03. 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/GBWUL2049063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8512a8fe77d214efa08383bfc25beefeee7c6588f9abf369f1dd0ef2686b13. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/GBWUL2074958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8ef7fdf932699590ab8009b047b2598720bafabcea393d20beb7f76ba7ac15. 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/GBWUL2112785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75527ddc6f8194df1503378f55adfe3b81faefe3f820cb5d757163dae12c0a4. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZWDE2303367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce2de937213117793c6cc47a4ce4b6129434638ea2b3a22f8969261a23cc819. 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/RUA1D2298090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d6d06e7ab83a07a8a19dec97de2f6c149b3e8c1321884e45f7872f0df6acb0. 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/DGA052057869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441bd06dc65e45d3eb48b85d3c337b77ffa0619edf430510a22a5214f4a4b496. 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/FR59R2127797.