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 0x26cf65fa290b11b1f5b49dc9fe0161ed9201be2f0230481edc3c93b43896a657. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e337b83-a0aa-4761-a7f6-fa9335f72841.json and https://artists.proofprofile.net/proofs/artist/1e337b83-a0aa-4761-a7f6-fa9335f72841.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 0xf17cd705c45cecb23e4a33e7dd60fdb9371a58faea146ed89a6047591a1fef3f. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/UYMP12000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c1515c45993a830709e056a4dfdf60a4e1d40bb084e3c8e17d4c28f39a968f. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/UYB141723206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe837ee338c4d3a06e2529f6751c71680c5bba1173f4657bc16fc56ba65254d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UYB141723205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb297ae2fa699e82ec5c54c9c959339536868efaa955632da49e8d9d74e189aa4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UYB141723208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c645761eb23aa582c8ddb30b1eb8943c5bd99096fce7ed23dd89eb29cde5de. 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/UYB141723201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dcf92bca9835341edd9511c3cfe9b61d8b15a3056194224bda1f5f31e531f79. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/UYB141723207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7659ad18fa7cef16b9e2872e24a6adebeca55c17829630679cd00cf277a0b9. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/UYB141723211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92b78f1f4bf2a533fef16e5c42d1ec2128acf50799786187e6066046c0b4e82. 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/UYN161600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568c9722ef408e54c954a662a35359a2461ba4a5a6d681b8f4fb2d81c7f112fa. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/UYN161600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4884de8c5ecd00d8ee8433a988066140b2f3ecc7a53539a6c2fcb0f65bfd7802. 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/UYN161600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28518ce9fec2ccc973c6210bdb4a4df3d24ac574399b6acc8f5db95035726e4. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/UYN161600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2346312ac7ba2f2111bbc878ac049896181d7e0385c5029123517c56b5a8083. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/UYN161600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477e58458ca43f1f708e8a8ffdb7f633a5264c24a7c5d205547987d70fe1803d. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/UYN161600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26294609fece08db6dfd28c8e060b80902e18b943f6f5f14469e7265e6a43895. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/UYN161600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b2d323131e17a02ba5df93889c951b9a60e99314656e7d2d2a1e0f3bf07bec. 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/USCGH1593008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffc878e289412c361c5840f07f60da4df9a9cb293a0e7e546183190f63f2e53. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USCGH1593009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c90ecd38e3079de96b6d5e1fd3ed617a69578e8cb7bf5d2d307329c8715b30. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USCGH1593010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7ffee14633f77b96f46f120d7f4f482266416f6afcea49c87b29c32b2624d8. 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/USCGH1593011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351f5494e57445b2abe85352f2f2de964587c30cdcaae12681a85351ef434064. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USCGH1593012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbfc0121f3017195a7c99a15ba8ae1bbbf03e8fe8a79418af397ff19b459cef. 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/USCGH1593013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35796784b19e40a05573ac3e8c28f8817ae449f72104e225c7a646869cfbacc6. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/USCGH1593014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422d5bdc09f61641bd20d289a9f9d4c6c5765521c67a8fdc1e65fc4bdaa96663. 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/QM6P41515650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32b496feb8d8d2b94511dfd0dfbe79a4b0b51a21a0d8e4ec0bd002552308a28. 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/QM6P41515651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f28e7032b5e9181dc7e32a62656126df5d9c26e4640f3aa13202f4c156baab9. Chain 2 (Bitcoin): anchored in block 960101 (2026-07-29T11:46:30Z), 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/QM6P41515652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925534bc2b7955c1d6a264a6fadecec6fb39dda7b1f81ef2966a50e61d010fed. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/QM6P41515653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48ef42497e40116c669e2ba7260e6ac34ea2003509df9356e84d62a43662838. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM6P41515654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742116d8ed3536ed55243ad44af328f8917d5964eb295d78aac2f9c436bbbbaf. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/QM6P41515655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1d52cd30e371828fe80bcd81315859934f55db025b7025e71baf676eb43d23. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QM6P41515656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05355c88271272fa81a6ae9df945b40de008f15e6b1cc3f052e157348d801677. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM6P41515657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd480161384cc8405390b3d25b0774be0bcd5192d2c2d1c3ada9226eab83559. 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/QM6P41515658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e292faaeee7db4944d2dd1c1440867ea98912f52127e286d6a78ad63b92232c. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QM6P41515660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4c8eeb82a14b14b026d4176d1576db2bb6f46f1513494dba5c0c85dcdae034. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/UYMP12000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef568dfac30d534c053ae273615e1597d2e48e86b56a71367b8b249458f6b1b9. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USHM82251048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5261a392e053595d42079f9b1821091c7292062c8360f3d5c857d0c43b194d38. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM82251049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9438cf10e6a5ef6ee24eb788151b5a0fdf1c78e7f8b671770853c3f2ea109850. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/UYP742100001.