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 0x203349786c121daf8af7b93b19f925e76764afe15c84d5144a8424bc84e67acf. Chain 2 (Bitcoin): anchored in block 953864 (2026-06-16T00:30:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03c38b21-1ecd-4187-8b33-ab80329d0c0c.json and https://artists.proofprofile.net/proofs/artist/03c38b21-1ecd-4187-8b33-ab80329d0c0c.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 0x22cd6f6ee015a32c252e090e8d28e0ee455f47dd10839c71db929adc355c75d4. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GB8KE1956041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af4037d57b790531c2c90a44e796ddb270676f19710b31f4a1106738dd3331c. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/GB8KE1956042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05f702afa54a2fa72e950d4d75a1ec37f7136872b28fa9590cda18128d2be80. 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/UKKS72000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ded9ac8e90ba0fca913b8756cf393e94d628a7dba5e2b200cd4ec32fc3e34a. 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/UKKS72000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9816c194a15f04bf32ddb56ad09bd7f5431ffb9d88b67ca7a8602158103f11e4. 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/UKKS72000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297d223744c5093de2aa2140095ce06247713bc492385ba39581d352b11989de. 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/UKKS72000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373cf170f72774d2c66cce63cecc2ca867b637c6f0091cfc4fb4844cb643a9bf. 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/UKKS72000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d5b9b9c0275131404313bde331fca09f72464b6114b3261a727a26c8f67561. 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/UKKS72000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae94020d9ccb143dd888c96fddef659bfd7efa5368a3f6056b372ffaf59eaca. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/UKKS72000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0444cad393a65d213cccb4593d9af6577ad8803784a8a7797b2ba6e4c13413bb. 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/UKKS72000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad7f76a47b32104811f3cf53334e33d30fc4fdab61be20781865cd9b35012e0. 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/UKKS72000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e67d71a635bffef754b7295783c95c3dbc63a1fec6c1168be7417bf79e7ccfd. 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/UKKS72000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00c9758e173b6401976251b7aea7cf6104eb0e44a84869785d76f2c5cc89b2b. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/UKKS72000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c881cf4801b489708c0102248beccf39208cf4ccaa501a42ef83954295524cd. 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/UKKS72000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7558473e022a6ae240996b55d1b8c4b59a2858268419cc94fcd85def88a796. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/UKKS72300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d3b97be353435a8c2c0f9adb48754497aa6b149d5426a6300487550e9c90e6. 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/UKKS72300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60d80e1c6bcf960ad1fe6b86e5ce31d82f5805bf408277d85f6a6dcda81cc2e. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/UKKS72300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715970ec3252af1212864355e9a8bc4b773e3f948ec5e57b75469be5e7f6c1ba. 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/UKKS72300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe087ca0e0be1bf40a818560ce4ae3c2c10139743d3b314d70c477b23308f0376. 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/UKKS72300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3651871a5ffba30f10a8fc70f40a98d38649ea6f4801bb9144611778e01b789a. 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/UKKS72300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf4abc2d61aff33a6dc5187014f520e83aedec7f07329bc882dea18de9b9017. 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/UKKS72300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fc0db98ac3f470d465204563de2d029334fa63b4b1b5c6137386eb9630f301. 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/UKKS72300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e65fb03e4001eae8eafbb7f3516473ea1173083f2b68f3e66278fa028d9e0b. 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/UKKS72300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6aa8530bbb8b27bfdcefa5ce0084ad32c66e35ab4fcb31782d7d09554e231c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/UKKS72300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2a09535a3a64712eb8d59b7bba5d02af439a433c8b5bda9d9f50e8c9a70e68. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/UKKS72300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5d7ac85d6d364e7ab96aec0c4475a9abc6bc2fef53e6fabad43273657189b6. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/UKKS72300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e55d1d2515eee0214ea4c2b09e165d3be176984954b8a4c2cb311427d122c9. 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/UKKS72400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae18877f67e99a98f8f1f440baac96d3df4fe6f6ebf72d5c79eb33c3eb75923. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/UKKS72400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27180388ba90cdaf68c3accacd1434bdc09270caec15cfd9186a698f4727eaf4. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/UKKS72400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c90c4bcf7d93c23f8bd67fee372f91791c5b42db79bfc768a409b2e0328d5e. 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/UKKS72400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825334ffc5780f94386ca3772cdaf78e3bcb480929d08b7b6fbdb6ef1753d5ea. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/UKKS72400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48705d070a049c62c5e2fbbd9f5601223f3381c46aca14f730b0ce3c4f3675c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UKKS72400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487f4af40bc751f538ac29661b6f225b4806bfaa0592d14883b703a239c2f7e0. 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/UKKS72400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934de5918cabb8d51acce91b77684642fb6fd6c648f5058a3d72d1f81013f781. 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/UKKS72400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4aea94a85243cea0fe586d8c389cf4c1e6686f222762f7cb8f1e75693bbb10. 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/UKKS72400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47365659da90202e64d4d8496eb9b6de5639cae53c62236ad6a73863eda62a4. 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/UKKS72400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71e533075357194a65cb030a966ae8184bfee861a2b6b29fbc89e1cfd23ffb5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SEYOK2332288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5183c723d328bc802cad3c9cc56fd24dedda082cfe4a3249a403d15b43c53836. 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/SEYOK2332289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387f518f2183e866aff531dd410103cd58dbdfb908c07659d50ea2bd80909609. 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/FRIDO2010082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc79995255b64c2257b2f91162dbadaf52d1f99403fd74042dedd32007dacd0. 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/FRIDO2010091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd543ebcb468d2d3f8a837c6d05552cd8f348a9a786e6db79ae533873f6d75e87. 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/FRIDO2010105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199340cf757048f254942de45d62c2bb235edd4fc3b14f4a81aad82718c79842. 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/FRIDO1910371.