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 0x00d8b1ea97b82e8a6b5905b98db287d96a1e992dbe6ea590e43124060cc1edbe. 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/2f504791-42f1-440f-8872-1d62a50f4b91.json and https://artists.proofprofile.net/proofs/artist/2f504791-42f1-440f-8872-1d62a50f4b91.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 0x7bc9218f3fc2d17ff14f4eefb1ffa1ca986b63e6cfd1b445b792348ef19be67f. 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/FRX201746197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49ccdac893c157395469f83365073b82e6021793b148649b6ca8399c85c2523. 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/CZQ951800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d83a07eb26d82bbfa07252d26fc47ee9f5ed7b56ddc60ed027b22bbe15e2de. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:28:36Z), 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/CZQ951800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54afa524c1ca56613967984c0c79f53d94ca1a000e4832d7ab130d6c93bf50d. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:53:18Z), 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/CZQ951800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6d0ded385294b5d9ff87bdd194754f708079e7b82d227b1f2dea89653e19e6. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/CZQ951800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75fc7b9cbaf1d3316860065d9906e2eb9348526886d5bca249793219f2e5171. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:27:56Z), 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/CZQ951800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb55d29c999e2c896c680f6aceefc2b2b69c6ee8353634e2783492d37575f82. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/CZQ951900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc113865673218a908924096ecc1d051703fca99de3bc406417c148110095c396. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/CZQ951900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2daf19e397404b8a9695f27709427097ad37d0a2c4c99ef7fcad4a2091751aa0. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/CZQ951900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540647d7a6766c963c68c06cc6259bfde60f132c57694ca9f079887cd9baa9be. 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/CZQ951900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0755607897c6d00302b9469df167a22268b8d99a639780f0bc43e32cd34aeea5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CZQ951900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06963b21b3a628f3a208ad09288dd8b18c162bb92245d28fdac2b259dd5b0a62. 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/CZQ952000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c88f3afda305052b26a2f84000e0f80a76c7c986822dd33678b5315bba680b0. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/CZQ952000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebbcac1d77c5dcf838a6e5fb73ebcc165ee1c57e3d82d65f6cffddd4b8e5864. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/CZQ952000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6635bcf3bb67686aa6ff56e0b42c6fc1893414a9368f4bb4d9e76025d66f330f. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/CZQ952100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd05084199f3763f5f723b8cc0fa6293ccdb32ebc7fb5bdd7fdac3c38c9c28e5. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CZQ952100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42eb179eef290ff148fcd04ac2312a6a3fce3c926177830b0d495015c8f2426a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CZQ952100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f4c38d265a14012da9ae4abe904a3f47c4a949aebd576b112cec22ab33f813. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:59:46Z), 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/CZQ952100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42cab3deb3fea1b6abb820746da9d358a6f10ee9507e407712c00a4209cb334. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CZQ952100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb687751100ec5f8f70a8f601b30dabbbba7f8c67deea09d2d72739f9bf6f5211. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:09:55Z), 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/CZQ952100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ee86ccfbf6a3e0f8ecaaabac04096804df537df4554252cc144679d8aa5c04. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:04:01Z), 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/CZQ952100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a45d67d423346f03cd55a502386cea3b9a26e1f1a17bf6db2d2965bbc32697e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/CZQ952100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcaabc73a400fb42ecec0028ef8382636fadfd44283dcfafd1b2811051c7107. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/CZQ952200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e67aa3da1aa98c40bd5db15618c4a34ff66e3c350883320aa7bbe4a392c285. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/CZQ952200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c361e1053b7c4be7c144949f44ce4ad45c96b87d751d952fa7ebbcff31c2fd. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/CZQ952200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9b4c1e3db9645d8538cf2522498608af039d62b3cd1d48a99aaa2d14c558ac. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:04:40Z), 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/CZQ952200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb102637f9d74baec003d5238f6898e9a9c918fc2804eb4cbbf722dfa8c872246. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/CZQ952500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec7c71358d266f4285fc96482f5afaeeedc2103babdccba1c7d1a13d7e3f63e. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/CZQ952500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0171ec1298f0923e8c0b797fc74a6fd95212f8e38d4c15f4ed0da5f788da1a4a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CZQ952500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5aef5e81d19977d59da790de21beff6180c928883decfc89be69494bd3ca72. 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/CZQ952500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f7ee932b39dc5ff112430a5cd1d49929b151b307ec1022993013088533cc83. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:34:20Z), 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/CZQ952500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa45e418c220812f60f3a5c3838d8df1d1987ca5fa0f02514e10d1e513f1b43. 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/CZQ952500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42acb26b89ecf5049d2a6b10e9d4f5cf3cec83ce472c8ceb2ee5d81c30f4fcd. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T06:59:59Z), 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/CZQ952500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c890a13a83263e1736562e4cdba24b05aae9836331a56d91c5d2b090021627. 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/CZQ952500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ea22f87537383f2706a53dee2181463eccdc86553d6a6b52ca2cd0224d5962. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:08:27Z), 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/CZQ952500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b86d1509161237b0bbfa2a36c26d668f5f23c1ff95f4beb838f3ff9b9e38a9. 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/CZQ952500011.