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 0x677a42a88207c05c9487334a5195d1e3fc863cc31b9e958472f4d32d45e5751b. 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/9089ed26-e647-4686-88e4-09be784a0629.json and https://artists.proofprofile.net/proofs/artist/9089ed26-e647-4686-88e4-09be784a0629.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 0x876a83f07f362fac99c947c0e8dd920a774fe7ea12c2c6b5f8ffde35f83e823e. 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/TCAEZ2039904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f3877e2ea1fb2fced42531570102481c53163174b84085b1223c50647ef025. 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/US2762101554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d545410ce4c5b9e49a762f2a185a35502259090771d22d90897e34bfe637a7. 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/US2762202351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30947181877fd799a59860bc4c316931b04fbced4a3233544aaac5a5778b74af. 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/US2762094324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a65e10a72aa096c0449bf8fba4061523ae51b97047ce57f8ceffee9f4ef04e. 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/US2762100339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d8bb2bbd28d46a346553963d041a86cb0c0e53631dcb317fa5d10ed01f44af. 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/US2762101740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd223e6e9b8554393bfb0236cc52f713cfafb4709e5fda904500bbf72b40b5b. 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/US2762101331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64378faa05ba03687d760af53608da1911a9376496d66cd7f36ff78f161bcab0. 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/US2762100644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5034ef3cbc09193f4b246c685bce2b180f2ca0014304f1394db1b511790643f. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/US2762202151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3031e6a4bf969ef48038bbe9d21719b9a9785d2787f7ca73afce337d2d5da83b. 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/US2762202160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bbd141b5c693724e7f6f7c492ebe673d11aade7abe78d3982f6052ec6e2b6c. 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/US2762094390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d15a5e6da61217c866e63bba8474843bf517f4f5ac11bf19afbe5e59e7bdda2. 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/US2762202627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f7e36890d43e2373a58dc86da72e1eea55afd9581d8f4d1e294ac6d067f6db. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCADW1888025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d526bba0210b8ed63cf1893295ef8d4499f0fccf8d47c8fb14708e49a654c8. 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/TCADU1857023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534b6025d267718878ca6ae81c243b26e9400d636b64c1b3474dc9b107b37068. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/TCADW1888042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118ffa0daea078a887ab8f1508eb216eb8be71f642f2dc6048d95b32f67e3710. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/TCADW1888043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244affae57adbb3313fe418e43650a26a5ddeb9bedb9c22d892146f299b4fd8b. 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/TCADW1888044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc4635c470c4bf70c995ef66f3c0b7f05a55146f502c7ea66aa21a10e6e7626. 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/TCADW1888045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e3a1daa6265c576252b74e2d8051d20b467e987ce13802a61c49f96c80e21e. 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/TCADW1888046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424b193f91df5cb525e76ebcf2cf1a7d8d7b62ccd45653b64e5a64d0026e5f2f. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/TCADW1888048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b794ced4ac5f7a2aaafe76a9db330ca328986cb911f4282782158cb0e53a2fe. 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/TCADW1888049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f27605989b7d304ab4503f6748d3f29b7c60c5e19ce9188b5b9e720a2a950a. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/TCACQ1688778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd955ae4ff3230442289af3a05a50ba9e42b81811904fee58b07441bae8bb5bef. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/TCACQ1688779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194c31170cf7f46408c930f963617ff58ac5e908f4f03204a3433809a679ea43. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/TCACQ1688794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870fd47c1b75217f6b2690784a3c90b0bc0e6153a756ead92834a05fa9f032f4. 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/TCACQ1688797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3dc78d2df1a36263860095995bbee72a3df2cdc9b93ef457b8dc715a3690aa. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TCACQ1688798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f85660ca405e8867771c101eae2e2f012fccb67cd42c2cf5adafe9e2c54884. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/TCACQ1688799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb782acea668dc9d5c7217a0f5d40a3469aea1e6b20885a915ae44a9ae4d60c. 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/TCACQ1688800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bfdad360920f0440dc7d3e129f11f393022435cffab639ea8ecc213d8c0c5e. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/TCACQ1688801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66d399957b9f254436fc88729f7ee6d85a7430d82b775f217384e0f2db8428b. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TCACQ1688803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd850e04e96ee57757e3c3b33cdd94328d2c4c1e3c70db6694ec1ec9d1701a65e. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TCACQ1688804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fb143669843fa681d17194ce00260967c61d7e6d3f2a57e11aa8ae89baebc4. 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/QZK6K2482334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de358c0d7ce3744b1468ce3fad0de1bcc1f7e3c0de94cd71397aaa9310bf9ea. 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/QZFZ22426227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe412015b72ac322f8d9115695b9b15cd6cc3aa211f8cc696a175c489e8378cf8. 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/QZTAT2386479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf043ea96eb62e3af6f963161d67c37a0b40d909d40b20ada09e01fa732339d03. 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/QZMEP2358146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea657a99def804c672665ef78b6f3c76d2ef4362c436dca865bf41447ae6dd4. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/TCAFC2045539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244affae57adbb3313fe418e43650a26a5ddeb9bedb9c22d892146f299b4fd8b. 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/TCADW1888044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d526bba0210b8ed63cf1893295ef8d4499f0fccf8d47c8fb14708e49a654c8. 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/TCADU1857023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956e017a94d21cb6c92dc222bb71cd1bfc2ba0d6b873f32467f2bf032c30129a. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/TCADH1743973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf514b318979dba4c43dbd98d7f844a23f11024f0027dfa81aabf39ab9fde1155. 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/TCACL1695669.