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 0x392804476d7ba9b1647cff0bef4019da4aec7cab0f25be48975e78a2886b14aa. 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/36585a4c-552e-43ba-ab71-1ddd6ded9af4.json and https://artists.proofprofile.net/proofs/artist/36585a4c-552e-43ba-ab71-1ddd6ded9af4.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 0xa01a7404fe50f26c588d76b2e14e293c8ceb9639afe93c7072c0d597e8726968. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/GBKQU1203633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff4dac933227af0b1248b18e40789e73e883bd321f1e5b51b69cf39b5ab0c01. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GBKQU1213114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0adaa4f048f501374bb46df889990f1e3256bda4bcf477f410f3810c20c06a. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:03:47Z), 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/GBKQU1339620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3486544ea826df82e49f5b770d054a48a77fb7c5c09ce80a11c428f2146050cc. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GBKQU1221898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f42770a6f6e1870e2691a93967d6030770187f546a41843745c4bd8a5325ca2. 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/GBKQU1307969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aba14a9a4cc9c24fb069c74a81db62ea140a13c3209ad0bf57ab9c21005cc27. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/GBKQU1307970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a4fb4f69c6f1ba34af97e798451495f79934b531cab944b088d6fad09bcaa9. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:31:19Z), 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/GBKQU1307973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52c98ba88354bf3519fb82076fcd94225019ee9914d40c5fad0287aa397db23. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBKQU1424994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18b125d9c7e76f37704770db8062996c0218daf745fa74a9db0f42e73b3fc4d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:45:49Z), 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/GBKQU1456170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db0d63c73629d0122709188bd8808a36c96352672f9f558330fff89ff90570e. 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/GBKQU1456171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315f11e6c17c7505b453d78dec42a0f0dc541111cdebf452c78219db1b8daac0. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/GBKQU1616899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94257c66ccb1e559bf7374671c29bb653bb027df3e06a5f6bd60f8c0220d96cb. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/GBKQU1616901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff1e98b1fbde8f6125d00fb6e1ae21e6f17ebbe1cd54cd664c3384785a97e78. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:05:31Z), 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/GBLV61603566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa193472bba9423f962520f511e125dceb41059800d5a8a2b493ce9674dfaf6f0. 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/GBLV61717947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a4f5ea794a50afe12c6c8be3c76a28d579fe6bda17445b3cb07e23c8ca17a5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:36:05Z), 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/GBLV61717948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486d71a6c86c5f53ed333cf30c00b8f93c1ea3b4d9df0ee5f775c68bb5278a5a. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GBLV61717950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32cd7fcbc5bd759d69de20e6de1d32ebb639ab810b06fa741f3b8ffe4a8a69d. 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/GBLV61717951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796263cacda5c06ed571b5c83b293ae335338995e53826f8a9e9a44508d5520a. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GBLV61717953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5402fa54b9fd0bd54699a3f0dfd3ce923e3fc9f6173b41773c98c96c028ba9. 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/UKS4V1900471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009cf36312e161aeb92bb52c69d786b66a9d8d7d85a321ca884a63001eb05526. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:30:34Z), 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/UKS4V1900475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b97bf5c06a331e84601e7b256f367495415b16368aee94ed3447957fb1a0d9. 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/UKS4V1900477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916c62d8feee4be7844be4cd8d19f8478dc670f8ca18d95230694bb8cb2cafc5. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/UKS4V1900478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58bb38c9c14038d1db7a58de7cb5ff67aff067fe730f70baf4fb9068f92126c3. 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/SE6I32040120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89df24926c91836231c19f7eb562fa795800b8eec087a97dc0d61527daca1e0a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/SE6I32040121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1913f80103f5dfb98d453dd7a6321fa6e1a84306ec25704be0dba1fb07ad97a9. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:23:16Z), 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/SE6I32040122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b51622045176de6ce97027b435d1647ecad5c4954cb2d9a8937a68e016eb94. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:09:57Z), 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/TCAFB2079589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd38d9dd89b5448a56d83d4d5112420a0477c4fcb4a1c01157a2a1df42daaf61. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:08:43Z), 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/TCAFB2079595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3486544ea826df82e49f5b770d054a48a77fb7c5c09ce80a11c428f2146050cc. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBKQU1221898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80788b6bffca51fa91adbcb5198488f7fecc9842d096e1d53e87247473d4d243. 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/GBKQU1425028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb616a7a20967d4c781ee98451c9867fcb872125388bb805c8e8dde2d1008285. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBKQU1456169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5d3d84730eeb31027aa959a33f16600cb2bcee0b565a25735e43712bd0980f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBKQU1520264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3ae780ee8750d62d9700dc3ecd54231ffce7d6664e311d036799302046589a. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:49:23Z), 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/TCAGJ2229668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256fb28d5bd372ab409d3876967591c3cdfa6386b989bced7fa912cb043a8280. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:38:38Z), 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/TCAGJ2229681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94973f4829e435a83c503738e2f2a11f1cfcd33a428c7c823f2a211ac5784720. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/GBKQU2345771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d4f53177a9a6d9598f8d4c013da5d709caed2f342c47f0d3e26c154c29ca10. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/TCAHJ2385180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12d78eae76df6eca58508045d9e9dbd36bc9157c09a0777e9fb61c13abbfb77. 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/GB8KE2412971.