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 0x5fb054cd51b88f9b40e2094ba5f8d2bde16861c5152c38ac1c3d6adf96bbbce1. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d5f8a92-84db-4fb8-a856-b9664f9ed19b.json and https://artists.proofprofile.net/proofs/artist/2d5f8a92-84db-4fb8-a856-b9664f9ed19b.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 0x86dd87f6d1a6e786ffe2fc62fe0658e83c2dfa4b51bc0661295520e08c7c48af. 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/QZGLM2221570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b09b3a0e8d8fbe408c15298f66fe917ab94532d5703f26c83c01164df80cdf0. 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/QZHZ32213545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c67fd55f582858c88364c4023dba99c72344cf59ac061f48f471a2f328c09b. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZHZ42289986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a377089c0dfc6d5bae095df5bfb8bb26de00fe15ca52842f0ebd388909a2e1. 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/QZHZ42289987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86dd87f6d1a6e786ffe2fc62fe0658e83c2dfa4b51bc0661295520e08c7c48af. 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/QZGLM2221570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b03fd44c9bd673d78c0301875e4136f23499f13ce6296249f84e3ccc60186d. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZHZ42289988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4442942c7876bbe24a6066f1eb3f9730216d07279cebe75054a19bdfebe02826. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZHZ42289990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b09b3a0e8d8fbe408c15298f66fe917ab94532d5703f26c83c01164df80cdf0. 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/QZHZ32213545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470dab0380275afbf9a76faa8209c6169c8abec7809d401171b3c8fa5fa188ab. 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/QZHZ42289991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a416e1a0c0ab3b595314a000f7986c327a5a8f2d5747891baa5eaf0bc9a90e0. 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/QZHZ42289992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15cb51af4ae9c9bc9c8c8285e722b1b1b3d7f7027e0b39aa4f705559eeddacb7. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZHZ42289993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b3c994263919e5ba0b1f58a4ac4352b6cfcd902c7e2f2a5a1e03afafef8c21. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZTV32247384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca63218fef4293ed6d21461f56da59bb95636055c10e9daddc12b4cca24e5051. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZWDD2296635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f600dd5486dda3f0d0baebe723de2d7fa1c1015930cb4b003cfd0492e5f28eb. 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/QZWDD2296639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264fc8a1d744ea12ac0b476d8e8c657eddf3e3eed3efcd847eff3f38c0253bbf. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZTVM2494743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f6272c6b1dd738cd1418c7445cfc861189ebe07854038116a4e773e07a69fb. 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/US7VG1839757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a68502af90b7c1a1ecbf3f1393dd510eaea8aedf5233716feab16426b2df8f. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/QZGLS1995141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b8af19d3c24d189545fbe879d22a644060566076bc3cbb9728ee2f1b9d0200. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/US7VG1987691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9336052e9d0d47279116743bc713979c6bfb522351dd7e3be268a1f53b22ded8. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZGLS1995143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc090dc18ddeadc7aceae0f36bbe9d0af9e7ad79e195f27647aec9155534668fd. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/MXD782400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be5b905226a38b9d7e8f27b87cfd028c46e30df69076e99c9a0154117e5c243. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZHN51943213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f4bfe4d1032a819cf5d5b61f19c67f7d2942f91532a531b38edd3084881169. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZFZ31997101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc1a668c3c4dc56f07c36800db535122f6bdc9e38e26a58c7d0a044062972e0. 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/QZGLS1995439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88586b88eef0c5d9ce2216e65d420a0c86f349f8d8bc9a0f4d93cc572f881723. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZES62366998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e302f887df36a8080f616382e6c9f0210d95794e72ef2d0536cf78a826f6e8f. 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/MXD782400656.