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 0xd5404d1ffa5ed93be2e217ce99a744526a34be61239c5037305475076a339b09. 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/4fec9144-e438-4f08-aae9-c0b3a6e5795e.json and https://artists.proofprofile.net/proofs/artist/4fec9144-e438-4f08-aae9-c0b3a6e5795e.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 0x79220a4c44bf7f78c2ccfe002f2a51e7260e9cf37a099adb4efeab3e89067f33. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/FRX762158661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b9ff574ef9cb6d1c7bb6305121beb70e17e760bedf91d853a2a970f4e6faa6. 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/QZDQH2379232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116dfab1899402a377f9432fa812ca282c0932d8e8c384c9ffa0158de442249f. 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/QZDQH2504780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6192c5d51e80c8ec1efd1e487103f18bdc327bc9fef7ad1e9708ca8ca6662ee. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZDFP2034391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ec0ef68831360e5b9b3607ed98fbb0e59811363bb742c246a777ebda158099. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZDFP2034392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1530d12095284e89fb8c91d234dade063390f0914ec76a29262b3b3e350eb0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZDFP2034393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6df1859c9f51f709869f67f0682f571bea1e88877c966cb18aed8c030a59fbf. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZDFP2034394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe21670bae236a78db68312a607982f30190e1a7b36568e97e646ab4dffacfb. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZDFP2034395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41fbdfe6b6960f610abc015c67edc81c76f5a20cefc36d5119c114240b60398a. 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/QZDFP2034396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1465d1a21b34a90492069bba93f84c8fe49a04256620d014b3d828bcc87d66. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZDFP2034397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26afa7f2feeb8e69e7a12d468d171bc216dba83b0ddfcccf96504794ad42b828. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZDFP2034398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6daadbea667ea1f7245d448cdae64faeb6e43cdc9048c470b4d82a3f467ff8e7. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZDFP2034399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07bb1228f171a60cf427f8165e8fbec7081c9c33d09295ca92415258efd8e329. 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/QZDFP2034400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67271b9bb22a9c4b1596074ef62c842a293321ddacf64501398a76fd21c5914a. 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/QZDFP2034401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a105b90b3120889a254b7f66fa7f9dab42dba3d306c8c74e99acc3f911aa4b. 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/QZDFP2034402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97af46b585138199c38f554734c34258b3b53a637601bf5bd55901e2ff84752b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZQMB2101209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccb9facae595df9a40fc8f06f63d63d48f7c24937a108e43f48888796175b59. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZQMB2101848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f22a32bf4118b770afe8dadab194e92b747985ebc0da792531f62ed739a2cd. 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/QZQMB2102670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7325c3847c2cef68c4e42cefa9a349bd907666ac7ba2943aedf8ebc108a16a. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZDQH2508778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e0b8dd652657ada3d43a7e786afd56db67ad02d6d25b1fd2230d7cd798df17. 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/QZDQH2440379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed8a1e333b494ecba5054dde5085fc783f32ce97b3d321c7e7cafdb694f9683. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMSAV1105512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ca4a18acd558b146ce6279b053f10ebfb6dd001075779fc4cae8584688a86b. 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/FRX282405865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3376202a16f32a1a680a5a3832154236e7e8950aa39f2a4e25fa9e3bab3d0f01. 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/QZQMB2106149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f383ef5cde84bd8ee7f14779adc5c83f25fc470885d5d32eab3de70259bbf4a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZQMB2105507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95a9b4c797e1c6104568ff27b57fbb651bd24567455b0cbb3546704aa1ea619. 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/QZQMB2104276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd572d04088ecfcec221c74f7e13afab7d424f68efd389b5bd91015e1839ddf75. 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/QZQMB2103792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d70d5346539249d4d512b6998479148528d610de011880d9f22ab4e4e7f200. 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/QZQMB2103177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2407c439740a502d7a1cc5b32844f9a467eddea1083c4e6962dabb07aa0b0c. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZQMB2102666.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3bf8d23509dd50db51c1de8d329bd63276e2bfae1c996f978bc193657058c6. 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/QZQMB2101607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde060b1c8faa7385f2849d830eb863f1f50cfd76dba07b497b13ce87cf1869fb. 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/TCAFQ2156533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146c2f34f9abada5cda4f677abafd8b62db9b0a4d12092005479fc610e47b59b. 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/TCAFQ2156443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a021192d5d3833d02484f44c7a3de93aa3933f59365517cfdf2340b03a6814. 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/QZDFP1908710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b9ff574ef9cb6d1c7bb6305121beb70e17e760bedf91d853a2a970f4e6faa6. 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/QZDQH2379232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a0a59c92fa544fdbc9feb9e790cecab050b912c09215b7a3842001da5b419d. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/USHM22031271.