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 0xfb1af402d877b07e1c3251dab8b23cfd4d029e5ab1f22e985ca1fd1c0e7f2792. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e034e650-c5e8-4143-86c5-10ed0dd01883.json and https://artists.proofprofile.net/proofs/artist/e034e650-c5e8-4143-86c5-10ed0dd01883.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 0x1b0be3c035b0666bdfbeb5e9d7dfb418cba5f8c2f752d0abacc537f2da913380. 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/QZTB32303897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ed561b2d6ecf65255477ea94aecfed2014284a72018dff0f02a981ad63c8c2. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTBF2363001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb00f362ca17523627347ed27eff975deab5fb6a6e1beda1e4b4630400df2388. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:01:03Z), 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/QZHN32476576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f967adff0bde439c2e28371dff0146a343ec4406cc21bee9863febe0be95cde. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZHNA2432465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b79adfc14b458037afb6d6ff79d73adf9407f6bfc13753c2504b0f113f35067. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:23:21Z), 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/QZHNC2449963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707c9b7503c30d1c2c119898eaea6261159adb84254384d90a17ddccfbad0df1. 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/QZHNC2460647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6914ee0bf96de5db9ddd67bcbd931dcae4b0c599a41a109f18004912674c2b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6H2420351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6914ee0bf96de5db9ddd67bcbd931dcae4b0c599a41a109f18004912674c2b. 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/QZK6H2420351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323f73c1b5f8b72596d3672eb1e935938d1bf9409090495f7d62239d62814954. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:05:46Z), 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/QZTAS2471444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6b6b7272561ae05792d896e8b5e59c21d1357a5e5931191806905caacd07c7. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZPLS2465420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0e32d5791d0c7618932ea54570c08956dda3f1461d1aa77a33b9fe090445ef. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZK6G2446884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680a9d188e378283bb6d5f54ac79a462897ddf4cef8d0a4db7045be1a0982d58. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZNWS2462894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3aa24619d03902f2ff994aa5533c43f2f73ece7cc623140a210d1e62ca21f0. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZNWU2434169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9496c2ed46a9f0128fc7162d602df75af7e90b8fa3a21420363a65648fcfad34. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZNWY2467819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1b96c81d46d09998010845afea564fcc937b602bf68f94fb83d96acb3565c3. 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/QZTAW2400500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6914ee0bf96de5db9ddd67bcbd931dcae4b0c599a41a109f18004912674c2b. 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/QZK6H2420351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a9a53102b2cf38cd67593d2a969fb28931e2fc4423364ced25ee82b4a916c0. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZMEM2433107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9314571fee557faa17e4840ba9ed834e6bae18e56f6067241f2ccea5d8f008. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZMER2465749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4641d74c41585a9d17f4ec776fbd57d3162136c282c647ebc66e3f71a58e6e. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZTB52495297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164893e2e96762f976c5e162b3cca94cea2af2b4a7f7bb1e3c7da44aaf47ac63. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZZ7Q2424706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ed6a5e754bbb8dd6e50ff1f4a2ec3afcca2236ce70c6d6efc97bf82dfa9519. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZZ7Q2427439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f17e12f1f157395275fd418ef1cf316536259fdaefde6a9dd115aaa4994562. 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/QZZ7Q2428338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7716a186ceb88b3a65bab46d99724c706482b4ef04cb7eb5f9a036dce48fe6c9. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ7Q2428339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10de2c66668d54410045d2c719b880e261c045aa06f172e4ccd2d065cbdf127. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZZ7U2461459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb79e8f7b8318f29a83a4f89ad53a249d274689cefe39727ab0c5bb32b86caaf. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFZ42563197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d54b202cccb5a43d1f14977b48a6b575a074733a860b21a4c2ef664624c0d00. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZZ7W2445389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79b689c3da0468e41bf8560a8ddfe151ff04da232a06c1cf11efe93ad3a152c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GBWUL2520641.