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 0x99c6d6b6bc61b11ff477a091baf84f66f2bc19745cdff512c7a713f156eb6783. 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/2acbc076-ced2-4279-9b54-129a8dd1208f.json and https://artists.proofprofile.net/proofs/artist/2acbc076-ced2-4279-9b54-129a8dd1208f.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 0xebd3bd1e62e4cea5112cfa74f56c429e3b5336604f12d7389e6f1555045e21e4. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/GBLFP1583212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d0e035878577fd5065154af7ff526b28b6dab6ae218b4fabef8067cd384af0. 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/GBLFP1583213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a24565ae7d3378952947773baf2465da87c9b9c4c49e00ee4c43d7de980050. 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/GBLFP1583215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4bf7e9794eac43d84d3ea35ce40e3d68f1e66cf0c53cff55f2faeba4fff561. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/UKKS71700004.
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 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 0x44cefbf9e94bfd4d977b65ee65ccedfa840a64a638b95f01756b92e6a55686c2. 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/UKKS72000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea247a5b318b2c91e6a6c4d3544707bf6b832194f364eba93c0464460da77f28. 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/UKKS72000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158fc26049e2a735f05fbdbc6d9e61712ce11525db8ccc68bd3ddc534abac350. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/UKKS72000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105b55bcbfe6890d55f465a40c847e8d9a80cd7274b3cb8c393bf1b6ffdfca4b. 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/UKKS72000035.
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 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 0xe8bd06d409c163f2107029661e9310434810ca02fb376c907318e3bf4ead3f33. 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/UKKS72500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb51cad2b9407717c63241cf639a6dda9611b2ddc139b6a700c39ff8f9df944d. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:23:45Z), 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/UKKS72500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe292bc319b40b734be6bb1862ede91b3a489579a8e67d65fc163eebbcd6cddee. 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/UKKS72500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5538d39db37de27318703ded1685468f8cbf81ed8141e60cb370469872effd5b. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/UKKS72500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989c562cfd403e02e28059a724c9b0609331ac4e000f93fc583ff6702da71f5d. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:56:50Z), 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/UKKS72500004.