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 0x2ffbc86aee8ab2ae22a6ffd9469e17a57480ca63d449c170cbc981b04512d75b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c98f135-c7d8-4667-b268-e9c580cb0352.json and https://artists.proofprofile.net/proofs/artist/7c98f135-c7d8-4667-b268-e9c580cb0352.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 0xe97b184773e7052137a2fd0b9c1c83216b28f942112bea10242fae4be0c70b41. 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/TCADW1885209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2e389bac8b396b4c8625e8d2213235726d068a3c84242d4a84f8dc969cbebe. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHNC1927064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4452c6ee215b312a643497125aad0255ba360bd780102b5d80c18e87ed795ae0. 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/QZFZ22013480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66774222cf5cf413d1acab0ad001395e649e79f5844054b025dec8127c03a088. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:19:23Z), 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/QZDA52039732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4d3be2d7d271b895398d39b87f175d7ad97ab56d3a5ff5307fb702645987af. 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/QZH5E2022261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7079b69f9e388adf0c4c6e86a16b04ff35f5e237b39f031eea41c5e33f0a5782. 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/QZHNC2010762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906118c3cc156c994babb49cf6da7c3d1ff87e3fe9f31cd4e5f2036d805e1190. 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/QZNWY2056670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe528933175f26a6f283069b8d3c8b06d126408bb2c65c8cd8be8b6b27c1653ab. 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/QZDA82168448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835ac3988db40624690d20fc796f4774a938830eb596ef03f605ab5d0afbb0a5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMDA62129915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf921dbd621c44ceefec1b6ea537d19310c1fb5164b0dbc3f8eb09033edbf01e2. 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/QZS7J2289368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13934fb963ecf28d24759db47e3858fe6369d35d5b249b69105a9a83e45deeef. 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/QZNWT2219927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e2190581192af1740c84686cfa04f6c52ba9dbc6b64648e4727127f5dbcadb. 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/QZFYZ2332929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefe91fc007bf7e1de81de99e00df0fa1f4bfb7dce9d827d990f547eda8b1692. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTAU2340193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e14ccdcb36f2e6447f5ad73ef62377c8883ec992e065876c873b64522633db. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZTB82307673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d5fcbeff2d6b460bce0c73508a17d48f1985aa9023c6ec091d597d5ed2daee. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:18:46Z), 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/QZWFL2338450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893d060b53f9c8f4246d2a9b67a7215b93a90e6ffd9f80f2fdc4ec37eea002b0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNWS2476950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a32c76108c288fb57a8f91c58eb8fb1025d444d9667b421ea7fa1bbae5ec5b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTAZ2253344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7c0620fcf6a47f31de6a009e20cc5be8f8b3ac77202f58dd3a568789c50aa6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHN92243868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3adcda31db890c55e6f97f9c49e8b8b21b613464157c0991383de6ccf9a94f62. 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/QZK6L2144768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b97f892efeef15b714151d2a6b5d699b331b4f9ed619994348847a02652a37. 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/QZK6L2144770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0888fd5fbb129c444d179df7bb8ff31ea751edf6d77280177a3a0a121bbef9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWZ2099825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c209f3dedf37197ac0d2b761adb54e1fc7e753fb1e577a8c7d4e747f254e62. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZES62058892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d061deecafd5417fc2d38330e108d0b8820e72079837df69552cb20ef31e1c. 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/QZFYX2097407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcce84f0ef219517de1b2a85fbe16013438478d087eed423af7cdf44731c0372. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCADX1891195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ed36a65bb87f0ef7ab849b0aff5fef54af64a9abb7e69e043d8a944bf255c3. 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/TCADQ1877520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4262d720a2a58e4156b4d7b0928d11691cbfcabb8d91af3ba7e5a0c27783cf2. 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/QZDA62046847.