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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3c9513651c73ea3491cf0016695ef97fe32c5c3575d01d26c4b434315cb38d. Chain 2 (Bitcoin): anchored in block 953783 (2026-06-15T12:24:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d6af980a-b535-402e-93bc-29f614beeb44.json and https://artists.proofprofile.net/proofs/artist/d6af980a-b535-402e-93bc-29f614beeb44.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ballroom & Latin Classics, Vol. 2 (Waltz)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d932c9d29ddb0f8e7c2bcc0258042b324033c36bad08e74cc6de3d0f465150a. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/USV291400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd128af24b6cab48e821351264dd62d318ae1c3550c701751189b596560c8ce. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USV291400119.
Supercalifragilisticexpialidocious (Lullaby)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee999cd85281e432d599675b6d387ffc1fb7b0d98a5185ba8af5ff9cb97669c3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USV291400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2762077b179269e2c77cb0713f3ec02a73d393d5d2669d29485126ad0b410a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USV291400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c9b4cc2da8d7f3bcbecfe261fc68a69ab48f2d16ab7836ca583407afe7c6c1. 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/USV291400122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8ec566d5260b6345b887e4d0682e24c25a34d4bada6d2aa5933fa61c3e19bd. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/USV291400123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0ca4a00d0d71633e035253273c2d9c24dd1977fcf1d0a60eabcd3d3763c9cc. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:49:49Z), 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/USV291400124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfa4c75cc527466afee4353c98a8f95be487ce104cc297a500d0c9c157f82ec. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USV291400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c50eded0ffdf9423a3e8bfea836c8f72e2a3008239a1b4b4ae6044f7ab6848. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/USV291400126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6836ef1b3f1cae4600bb323d75d1d7ec1a79ad8ad232c80a2209645768986972. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:05:50Z), 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/USV291400127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff73f3c22f516f7cdcd7c8be3e4d14b4819c58c2885938ff354ae41c81d1caa. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:45:13Z), 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/USV291400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa488c14352629c31fbfd909215e7af881cb633b46343f45a3a969d4c107ae7d. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USV291400129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18cb5d8de0db339864b16e02411be28726d4450d8836c1e8dcf25e0d5b2f0f9. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:58:15Z), 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/USV291400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6decbfc5fc49541c3d81aba29deea54ed050629e4869c0596591fe470438a9. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:17:17Z), 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/USV291400131.
How Much Is That Doggy in the Window (Lullaby)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22ecc02272ab3dbd55e4765344512a53859670c7e61ce894abbe05078d37f8d. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USV291400132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60e616191dcd2fb213d34c8844cd61b02b8d7d0347059bc24c05800fbc033b7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USV291400133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b28f96a085e1d63ebe08c8f29b8e8244e7d3967d5f4a75b2e8b5082a7c6a0d2. 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/USV291400134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe74bbd518dd07ddc9da88019fc9d874bee7bc80436b74c184810625e16de8a3. 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/USV291400135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1787b4e0b1a785ae461e5833e486c50655a0cf943a65daf2852a66f4a2bd46d6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USV291400136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d530613c2c8f05b559bf4c07168f9174f3d7a47500e3a709c8028835f04cbe. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USV291400137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2275bcbe113fff6207f214ec49005b6ea00e6522d5447c102a222a3b8e554690. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:48:41Z), 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/USV291400138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c2f6102d850f1d16833dd4b1c1f799377d580bab49097136c712411c927a4d. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/USV291400139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cab2151e25d57448f8f1a3732fad28d6c2d0a460aa533d2bdd4af0d515d8bdb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USV291400140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ef0c8275aa8ec9bc43d8f7bcfdc34c68265e73f82fb429eb8c448809ac5726. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:28:49Z), 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/USV291400141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0cc70b99359df967170c221c9e961fc40ad8639a743ecd1895fb157ad675c1. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:04:08Z), 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/USV291400142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72095643113b77583a103aa306dd63a4816bdbcfd3d693f6a50c1bef4c999350. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QMFMF1471430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc1c0c3ee6c736368a6c4e21fa50142b95690928314834bb1c36a980b2d9651. 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/QMFMF1471438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9b66105f0f3a2751f32ffe4fcaae65d149d61aaadbeb1ea5ed14c871f28f49. 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/QMFMF1471431.
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 0xc32e5fb1fd1ccc08c5e2b57e86f5a3c9cbbb619d9a072cc2a15e580f4c3369e8. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QMFMF1471443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d8ab9422a6b03f0d841ada92edc19e266b6bf2cb088ba7583275bba90c0961. 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/QMFMF1471444.