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 0x0a8734ccd8412eb98fc91061c5bb6b3a6ccad48e5f9197fcbf3906968616236a. 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/67de024b-8ac9-4624-8971-50749f29638f.json and https://artists.proofprofile.net/proofs/artist/67de024b-8ac9-4624-8971-50749f29638f.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 0x785289386cc9f92939ed54e03552e3c8dd23cd8caf0616d71fa07b674d84c747. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZHN32019047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f8d650d4474bad09e65b345deab545a7d7bbfecc369c2ae788c0281eab9b28. 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/QZHN32019945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4296c20b87eacf0f7be9cdf0ead13929b4dfbd550d4b0882454d7f8e9be010. 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/QZHN32019948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd237e31eded5c51adc825b0ccdc0f7fc11c391fdc917ffb2e4a99c63c7c70351. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZHN32019949.
Chill With Me (feat. Wiz Khalifa & Larry June)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c3b09df3eb239bf84a63d0aac15cb09f30f64c612ebb0fd73a604d010162c7. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USUYG1450277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9f4e4599083a67d46fbdc86dbb58e0e5d0bde470e63415181f77755a544c15. 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/QZTB32414547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17ba2f6182592caa4fcae57c6e450ed3dfb13aafd6b6e7ccf736af5a8cea714. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZNMT2543620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9b0934f2f2d7a7afcc2a0e9084609c85b3c187185a1000b11cca36a254a4fc. 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/QZNMT2543621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bc19dcb4d591c721f90c54a1b2bc741f4894faa14588453e56b65354607760. 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/QZNMT2543622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdba4f0f910ef6094e06cab010236de31514b99ec6e2939079f19e4fcb71472. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZNMT2543623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0786873c552092be7529d968bebbb916ff6776ecbd7a769f841477d31e17f018. 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/QZNMT2543624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bae4d528dd1d26c96f5db1334190d8b6f0a5bbaa2fb59628b7cfbdcd35602b1. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZNMT2543628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c37af47dd416fbd12c0e5f57ce4344e60b4dd03015e1542a3b3987191f2235. 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/QM24S2107387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef59c7e6b53e3023de83346ba086fd5c84cacef54e7f295b88de5c16a3a2aca. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM24S2107386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68599d69107580d261df85af9b28cb69459cf3b501a1e1b974c5b46fad1e0083. 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/QM24S2107385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37fcee66eb0bb25b72da76ee7cb87b3a583ce67e2b9075627cf2415292d3c2a6. 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/QM24S2107384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e16c449b1b08a2f1d8378bb8ba908c1b3532985c4f82b4bfd711633629768f. 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/QM24S2107383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8179d7b69a13bb7e1b54aad2abe51b74dc3af1c8b94f75eaebc90036d5b5ef. 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/QM24S2107382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0410ee221bbeadcd3bf846bca4e99720e8a5100d4aec4439e1864b9f97b5c56. 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/QM24S2107381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf2364ad88f43f641655446481bc2aa36b733968ad378e1ea6b3938bc73c0dd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM24S2107380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa145ba6d3f00a07856c211f799de9c29f4b625aaaf7a63e01fe953bc8342543a. 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/QM24S2107379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b53480ecffa1c01350f7feb3f3626ac02414cd60a74708b2ea4050d42e7c80. 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/QM24S2107378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7974b6a0c159a84762bac62714577d8bf24d1f1934108a344c55086c848551. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM24S2107377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896c5fefef0dd979410b0ea37b2ad3bf156240dd11ca43b817ece48b4723f3b8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM24S2107376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d946211345c338335aaf82971dd3f0c034e96dcbfd424afa633f3530872f14. 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/QM24S2107375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7e2c22243934a415d8634c12c417022666104a7ac81823a43f729937ec7359. 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/QM24S2107374.