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 0x97801861900c31b84fc0b4532fb47b27b877661091d19e223b33958001a75869. Chain 2 (Bitcoin): anchored in block 953662 (2026-06-14T17:28:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5622e4a9-b1a8-4afd-bfd7-d048ac859560.json and https://artists.proofprofile.net/proofs/artist/5622e4a9-b1a8-4afd-bfd7-d048ac859560.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 0x706760d4842c35071f158226a1cc898e449455fb18ca6c80c3d483b0bc7b31f5. 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/QZDA42177099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd659dac1614b2bd1f3ead35fa134f3450f80cab9910b283d03286b7fdd4ba5dd. 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/QZFZ62103845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17a71da866ccaede5b701524eff5a03b4cba3bcbfee22cbbc2c0b03243689a0. 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/QZKDK2008415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df1f83ba8e1dc54588f62c7098c81930cac1c71222e2a7a1eeae6c3aa10b19e. 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/QZMHM2082112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671362e0e16fb56de19b426db9cb04aab51528ad1d5b6a316798c8436051b4fb. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/QZS652187534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d71738abd75fb30a1828cea09a98a8f85a933bb05eafd8d2273da19b59901a9. 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/QZFZ22153387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da12d6338bc429d24a8dae374f178e7880bef7c2685f11056d9ec80d82442c8. 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/QZFYX2118704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3cc0bdead021a39090c2582010a789fd4653595ba4c296008a4dd9dcaddc04. 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/QZS642119913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a5777f1e4e712480dc011360ff302efb7523545071e74be0fbec2b62ac3553. 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/QZS642350334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06763eb60fe4dafa4518322bdb98f11a772f666bda982c090172c619447fad58. 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/QZMHN2376167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644f45900131e35e486c9f014ce65dc45aca5652aa9a0f8e3bac7000101fe9a7. 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/QZMHP2339361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0611b36ff27e00f34e3ac72fb1d36676b5893fdd5ac30a1ba3ee9ce0d806ee70. 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/QM42K2378830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3a843f6d6f6726f24a2d2aa45c87ac237e8ff45bd2c387d58c9283faa578de. 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/QZMHN2354888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfee77578fd68937ea213c8a423105a1050f4d574cc9922c09f53dffc81af04f. 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/QZS642318332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84766cf16fa6a540fd3cf15082ea15149279cf00bc24060a35f2666d544311c. 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/QZMHL2322624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972a43105969cb85e490cf5b68c4a09630452016ed98d35e8d06e75ce58e07ec. 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/QZKDK2071891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da59bcb3baf3c22a97d94e82e71c38e1250c7f40d32f9b2789068bf939dc832. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZNWR2333560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2498f0cec2535fb63dd89502290f544e24236c165a26d6bc1903bb85806786d1. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/QZNWR2333561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472749189d326a7baee133d65912a0f818eec234bce679906a67a8cef60a78bc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZNWR2333562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e34ad88ed55b76634a12dd6521ffdae2d0d544b9e6bc1c37500dfa203ce2cd3. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZNWR2333563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37260e1f4d79117969031c8afe4010c440765da157ce8cf4f698840fc3138394. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZNWR2333564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53591f4b31cd957718373b2b5feaa382675e1cafc547d6c87de7b8961d05019. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZNWR2333565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd047a1d051addbfa0e208959a13fd8d091cc02170e3b0798b17b5d39a026ea1a. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZNWR2333566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c68dc58e0257f4f3953ab02cea318ab1d99ae7b82e8bd347f34174659b57eb6. 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/QZNWR2333567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af88edf380869fbd75870e5f70ca58737fce1f0e203bc7bf22e075bca88e075. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZNWR2333568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeab22754c865ed7a5be86ce8afe44173c899fc9e6e66bef9550dce2babc6fad. 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/QZNWR2333569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840ddb0957955dc275f6478eb0e43d40499656ddb83e963d2d09a1cd10c9fd2d. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZNWR2333570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77d03e5d0f4477fc4701380db3a2ad702637882f1ac4cfa226f032f538ab529. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZNWR2333571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654c884e3749f65465af110fbcdb7f66439ed544e613a4791919c91884d27094. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZNWR2333572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84655ad7bc5c4f838e541d1c962833215cc5da0bdac7c8a9fc5b21f35ddc806a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZNWR2333573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06290a8a6c6da16016e8100559440c382f051c84d8b65bf12c39423d6199c9a5. 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/QZNWR2333574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ac681c9879a18064cd18a88cfde0f364ca16aadc7aeaebf6ee20382ef174a7. 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/QZNWR2333575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9646394fcdec2cd5e8683e1a5eb29261b167ec2d22c100908246de08727b7729. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZNWR2333576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1013f34ac9f3858b2e1e446aef0d96e111230f243b943516a2a00a56af8c77dc. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZNWR2333577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c24372b26ed800b4ee99dcb7f37181d1ad1e073e73313e6fb584d1583b062f. 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/QZNWR2333578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106520fc6e355c972a91983f805d1689ec7435db928fbbe26cd252ba90356324. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZNWR2333579.