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 0xed73a4bba3d03ad748684dce6d545457c86fb1cb17e03492959ca5c4dabb1098. 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/170c4961-b2a3-4dee-8331-082d8b466935.json and https://artists.proofprofile.net/proofs/artist/170c4961-b2a3-4dee-8331-082d8b466935.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 0xf3cef433c8bbcbd17126d84f40447784649602d91b12cd819464ee60a96ac45d. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USLZJ1935953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35d31c71b35b0bb8f0b00e9ad70bc6bb5fdabfc678c79cd9e8efaf0fae9fea4. 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/GBWUL2064687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf314db44402905b87268a567f420f02259a1ad56384ec499a54617a9044779e3. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/GBWUL2064747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c510923b56011da8fef4a83f5fa09c0a6e37c47db6fa60bb5d93734c3254d00. 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/GBWUL2064874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306207a8471b985da62f16719350a7420a74f8fb37e1abddcc22f090406796a0. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/GBWUL2065246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422857353061ecc9402080ab8fa71300c1197294b1217f70be3cbdc4eab8674c. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QM42K1939400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfea48dd4e27877a7635ef84c917817113790168cbabb2c26879721496ee3bd. 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/QZFZ72123879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4ee105f4890c65f63a9f6bf06f6af848bdb33d9df7d76b32ca17d02dab2ea9. 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/CAUM82200342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732eb739a3954a362a1aec5bfc6a1e96913a307422dd003dc1f2edcd461b54ad. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/CAUM82200343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a6779d35719c527e41e5260bdf71ee0c930f12e9f0fa02be584213ef70242a. 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/CAUM82200346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d01a290035be840cad06da7b1c9cfd01a077b06acb498fd14d39cfca57769fb. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZFYX2368218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645bfa5e970ce3c3c0435e9876997041e16ecb38af0251433108c2a5dfc8de66. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZFYY2351426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47884ea57018288626738c34d3a5d36796d7d2f8ff32fa4ad237a8fa8724878. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZFYY2351427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4825df45a0c4a3c7784a25f1608f3ed7344b4727b053e22c7d32c10762d199. 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/QZTBA2314039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21574685ce52173df6fc9608e6844d2c6453998198b5d6ef69d73a34231de7a3. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QZPLS2320812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72a623327c151f1239e61ec8dd76f2611041c454e29ecaec4fc15d257220097. 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/QZTBA2314040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf3a06aec966567232021fe776207be1523d667dfc97597ace85e9509304f6e. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZTB52357823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0075fa15ef9642c8724683a11b4edc9cb791c9dcff912a7915f55b20b4b1acd. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZTBA2314043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd527ef2a760d6f4a9e80396aa4b304d7a70eb7d5adbcd0a405fd924094a2bfc7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTBA2314045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44c7f47204b698204ed6b44a7b15b785865e506a330002338113cb6c479d635. 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/QZTBA2314046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00aafebc766a5864afee28722ddacd75e7315cccb7f4d1b062790b7184ea082a. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZTAU2315803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2597c152b1441932a03f1f530bd449c98dfbb257197c1246fd174448d846e6. 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/GBUM92300113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7f298d43ad823e0bc455a72b4f3aa99048bcfe1b0862042e25a993ed6899af. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/US92U1906158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a5996c7e0d66f3c2499599a962dfd8db93c14e0296ed5d0201beec3df11d09. 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/CAUM82400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4dc2c376eb3a3abb27fc4d6e1841d389686e3d7f09fc354951671433d728b2d. 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/CAUM82400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f103a32aa70417ef07bf7f0da19d0ad829bb9f18d0cd28db6e2308df332f669. 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/USA2P2231363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb22c82519a36a1854585238cc8089aab841bd7731179b4e705107628e2b9c2d. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBWUL2315305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f1c21c65aff74fad8111ba0df099b30dd034ab4d490d368552354d016f20fb. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/DEA372009452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2597c152b1441932a03f1f530bd449c98dfbb257197c1246fd174448d846e6. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBUM92300113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6105f0afa5c9531b0cb8d3fdd255698bae381fd6b059963c4ac819a97cc23dc. 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/CA5KR2134492.