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 0xd84371a9076493f21f479fec1ec805c3e7cc3859ebc1811088fd03c8765aeb4e. 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/df2f91f3-5e56-4ad1-b6a5-a73f04044f36.json and https://artists.proofprofile.net/proofs/artist/df2f91f3-5e56-4ad1-b6a5-a73f04044f36.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x3b4934eebaa0086ec4f1f4515164785abd5d5c429a4999df88cfbac477d1084e. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZNJY2476634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae63fd011bf5c7bd23e68b085ae5f24d5c08ad2fc00f0bfc59728b7e89ed881. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTVM2446211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3275772c511c1c3cb2a7835944f6438fa711f6f72aa538513506ab8e32d9886. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTVM2446079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00973f940d08af75bfed121fef34699a5be8ba8bc8b2f8b976cb0b2d219d2139. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTVM2445301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa97bd0df536748701fd8fc08cdbb0bb7af45e7873c9a3df51b39c691c4d857. 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/QZTVM2464101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841ae61398f584fed436f8de7de74e8ee2f639c6af138a48c980520e5a95d842. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZW9K2405426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668a6b6f9ee6de6fb0462792e7d6a550d47c202566c370b7dda416f651dca1a1. 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/QZW9K2429565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3259cef5978412991630ce5195aeb22cb5223386468f0cdf1c4bef73330bfd9c. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZW9K2428737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a866e71b6b4c91c6deec7fa632739bce26fc7ab46a7d5869314d37cd66217b. 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/QZW9K2429757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbc575aae1b66c6fbe580141645ff976613158b83b66c16135159678134ffa3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZW9K2436953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5673961db4b5ef0c683be0f99dc1dd6991c88276fa039e77174df43c3f19be8a. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZW9L2469142.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632e47ef4d59bdf8ad0539436bb5290430b4c68b84be0fb6304b264bb4d1e7d6. 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/QZW9L2497863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ca0c1a970af2a57d3bee7af6db86a04f243cbc672a783e5c1312ed78fee1db. 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/QZW9M2432947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875b63da70f8c4599da52790cc8ee594a1b3e84359270b0e2de7691ecb6fa136. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZW9M2468197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede328938de3aad61b7774b544979d58e6231383642a326eba8741971e627c66. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/US7VG2530999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16f8caea2e43b6aa9824ea750c016f704d0e8e2e2f5a1aa350e5fab3dd46142. 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/US7VG2537237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52422c0a431ee6e256ad67e26ac641b62bc9db332c8922b61a3483fd26408a9f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/US7VG2558873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa654d237f05e5d493e7473c5d7b56e601fec20f7df7d75c1a6078ac44926a706. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/US7VG2556890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48841c5508a7520fd1136761794ca34b484ae2152efd4b255081611b9ed3d6f. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/US7VG2566262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8ee2e7446ed85691e73575b7629791a01851dcb585cbf358bfb872ee518b29. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/US7VG2574460.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40da0812d2dfab2cadaf1afb1a4b08b08a3ca3dcdd6b26ccb0072fffbc1ea5d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/US7VG2580407.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7808285ee8faa839cff0f2c6a189df4b3d5608c9a4de350afe955fb2d298b8c0. 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/US7VG2596994.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20ec92da9128a62e991317b154fbb1903ac7715c3aad42c4bd6c6fc89c50998. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZGLM2500780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed88aa215fbfda7420371df0746a6d8d49de4db67327995ccd1822eec08ac3fe. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T05:21:06Z), 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/QZGLM2533276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7971b47e765efba1511623f35a46e5582740929bcceef7291374031a8ad225aa. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FRX282522941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68c2ca381b172a134d4ce01e715ba267b92d1a6bb728524e59cb4a992f5b827. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FRX282522944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af628838a8a021f4edc3f7e071fa0914897d3eb2659cf632ee4f8970b045ff2. 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/FRX282521780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c2819158eed706d30ed1e797092a15a26c5b47c63c2d3beb673619e808477a. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/FRX282521702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ff8bf5ec4da51d1781b798000c242c1dd4d56823c52113d9cecb67fa803799. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/FRX282522935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2089c261f3827aa486fe43a7b0cf02834a3ff0620d23ff7534504ffc4648f5aa. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/FRX282522937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0a776f9cc60380a43ee19cb26671705e5acf04153777531b0d614813610f41. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/FRX282521703.