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 0xfa2ab881ba4be9f759dfef62941c69f6c8cae70cd22cb97a2ac9e9604e9a5c80. 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/e784070d-e0af-4f46-9904-99e8c1941440.json and https://artists.proofprofile.net/proofs/artist/e784070d-e0af-4f46-9904-99e8c1941440.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 0x68d65d750d756c09988cc0a3383bf6ba11d1a494fea4fed423ea683bec1e5f42. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZPLR2003885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9230f228f843ae9ca0de3e86322d7097cb210d27e755811313a6df1eb79f72. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:09:37Z), 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/QZK6L2270987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4be3d6d2a0e004e648215e12dcd05191647309692a1834b641b56477e14109. 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/QZNWY2222341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b23fcd07d2a05d794c09ea40c9e6ccc4cf9ae56dfacae40cb64983f05477b41. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZTB32285239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba379274accc28d9013f11cc53ab745812e582b7fd346eae23fbaca43bb1222. 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/QZES52360372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac54aad0a02c96123f754000c627ff034e4e9fe8d689a7bee5fef33b02e29c4. 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/QZES52360373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60366cf890b5f55133e7ba692fb30185788be530623d6eb740b3e9f51e915bb0. 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/QZES52360374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27524c9f0a7b5de536c33924a101d8c2cd5144d5cc503d1865d9f939bf1f6e52. 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/QZHN72375464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843c53bdad9bf6df50a4c5152a373a932837bc10ae69f9a566bb1682fb6640e7. 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/QZK6Q2347814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4e1770d7bced9343f154a792a24211d4c5aaf4f450c4fb0cc9b6443d3d1be4. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:33:55Z), 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/QZNWX2325867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330827a75e1452993dd70254da45eed0922642a4c5f07acee19c3e3873d92272. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZTBD2365440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e2dba9b95ccf8dbdfce91f102e5c9d7915d1f7fe8b148cfd13a17fb20ebfe1. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZHNC2474935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa456df606d118589eb5004362e5123c7a5d8e0c69612b8c8003441e40cd262d5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHNC2474936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d234159a1a3c4d70fae2b1e36d5a9359699bce5affaa038cc9cc84f00674eea. 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/QZHNC2474937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef30f3b4f388548c1c5824d18e767ceb1d66b493b42984a8ece12662c52124a. 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/QZHNC2474938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb931c57aedc0df4d0544d25422bda900a16a647735e2cf289c78814c7753e18. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHNC2474939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa28535dc02bbb96819c0ce3f94893d77e851165e156b7b1e4302a2ccca0617. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZHNC2474940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0e46edb22df431050b4ff6d54ed727d14ab607947661c83aa0f77506d92bfc. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZHNC2474941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7ce2d26ce1bb052bd8e6d363456371f8ef037aa640cbf859bc0f207bdb9ce0. 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/QZHNC2474942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba1c933d2b8d3abb8dc062c70b074afd5bc8617cdffd9f19093e69cb987e454. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHN82445304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63a457968e416e69d323fe79ec57d324dafb6f3fa77a53a0ca0a885c092d311. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZHNC2474945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da4f0c9536209116f1af9bd1133508882a6a81ac754f9c23d963c8f738616ed. 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/QZHNC2474946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3495ad16becc636cc8d43be8ed2f042099d7c45a98658f941fe982b3714b6dea. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZHNC2474947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e6bfaec8a926f80919ca913367f4da57c57f5e92c239b3eb58dfa2fd9aecba. 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/QZWFS2429582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb258cf6f0550ea476b931b16eb440bf919ed381de0f0949e1c0630bc75deb911. 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/QZZ7T2406704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf685fe6f7e645669a5330c5adf6ceb6caff652ccf3031a7fc05881864c9854ed. 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/FR7X62400030.