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 0x4572a2cb939be0572e5e13cc0a47372f85ce84d4427d4768e3c469c220a62035. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5246c884-b8a3-4ac7-a442-1e82e3c4d4be.json and https://artists.proofprofile.net/proofs/artist/5246c884-b8a3-4ac7-a442-1e82e3c4d4be.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909144f8bbbc00cfe57a0b8e2b43313865f8e3faa0acdafaf62a4968b171188f. 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/QZTPX2488309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f991f97062416c53097ac5ad584f200b594a8e584abbb360b15c00b52c234f9. 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/QZTPX2447572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97809993cd8455e8e79fcf8f80628f7d3b0e87adf23604b3186353435eb52ac8. 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/QZW9L2485624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c9ecced2985447e79323f54ac41457875204837e9c58f15f6b42be3cae99e4. 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/QZW9L2485625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b8e4127a2b0a740d61d655c7e126ed9a85b1c9ba5dbc9a40b04645d0f35fe6. 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/QZW9L2485630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff571cd61e5103ec664c8c9ada993d96649d81b8323fd5fe54f89f1ea70ef557. 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/QZW9L2485626.
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 0x044ea0bca4c059744ecbe584d41903e52f7911cd5ee6301c70c6cada3c0a2249. 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/QZW9L2485627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77997db83d7bb9dcd26710f9334269ddbef1d28320a6b17a432575b26d8c05d5. 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/QZW9L2485628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936f3fe7936b61d19ab0c7d1eaa2110b3c491a255c211bd0968a9c5b5e564e00. 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/QZW9L2485629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d29860e8ecaf39eecabfdce9a6aef675890dd200fcfd2556b3e0069092becf. 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/QZW9L2485631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799ac2649580027f59bd9c7fb2de13bc87e30ee22e11d06e5074d2b945aad9aa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZGLM2544983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b5bacb3a4d66f8c839ed29532f0f9db66be8a329c2c542350ca840762b57d1. 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/ES23F2500214.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd13720e672cd515d8d924e0e36848298448991cb24aa8cf9ccda3643aac63e8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZGLM2546058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240e90db25badb1314bc03c1f4e3a81fb4973702f6a099abde7095fa9b82d964. 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/BX4IU2502174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947dd62ec71077788aad3cb49753eda5699e99b0ba7a0504aa29d513f188495b. 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/BX4IU2421694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781bddeb567cf10f1ee15010b2b8ce5c0e5113d8a0ccc3f818da737a2d763b7c. 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/QZW9M2446618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60da20df93cb6a8c476659d93f02595746f801ab132632f385dd5de3d2994b94. 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/QZW9L2447804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe52caab43b71098bc227f083f71c5f298eb8a866cca2f84a4a70da4b4fb354. 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/QZW9K2425924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd372dfe7ebfbc3cebee0ba7bd6c66aec452f8f4f9001fbb89c548361928054. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZTVM2428062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1921bf67be401a44d5a99db840dad9afe405298c3ff986d68f2b69a52ff1d293. 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/QZW9K2421358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5d97c20eff59182bbb45b123e1bf05a279fb166cf129bab791095aff184ea3. 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/QZTVM2467004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a2bfd57a22733695b812577f15857aa1977e799fc685952d608ca7d10d14cd. 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/BC3PG2401617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210c598aa436ea83389ed07984f0600a57e36a49546b8b97ae0b36e54a72cd97. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/BCIH82300465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040b709015df831447f4cfd9a3dd8cb112ced88869582fba6bad88c448652585. 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/BC3PG2401022.