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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 0x69922957378b3f0067592c769a33d910324d283bf1ec96f91d89a400081e6a66. 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/6cb65a9e-7db1-4d60-852b-8e9b9062619f.json and https://artists.proofprofile.net/proofs/artist/6cb65a9e-7db1-4d60-852b-8e9b9062619f.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 0x8e78fff2a3ce3115681aa359b50f582d462e569caa9125674538e554f0f6ea35. 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/COAF42292397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56de40138ab6c89ce2a3208991e5aace42af43c8fb77ec49f7fdd2f4f4a468b2. 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/NLM5S2402141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0bb63107a29e5252ac92104df1df649bbd96912a8194b26164b8ce678927d6. 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/COAF42490234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24e45be61ce4534f610f4e7c5ad764a5ec7d5d79999f2a393f7627106a62a39. 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/COAF42392406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d42cc879bdf51bb131158dbc5d1ceb9111b8f002e2b4610a837f415ff601007. 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/QM6MZ2472291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858bf0950388ebd8306d98dc70f3c6e665798c780232905f51c418ba6e39dbbc. 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/USWL12200759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d49bb4c7f0a12f268b1c6a722de3e6046213ef27300a8222176e6bcd0690f35. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ESA011566464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4121295e087d41b9ca17826a7d1679ab65333c0cfb572170398ee4692683b4ee. 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/COAF42391372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f3096f082a7b7597d2754bc30ad3b34a773a4863e122a4588cb1eeac31add3. 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/COAF42491145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067b474ce5b725526b6a1f225237c520fa741c38349dbec1a056184dcfb3ef76. 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/COAF42391062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00559d9255aefb95aa6ab18702503d6de2e152286e7394d36f152a45a3e8591c. 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/COAF42390640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dba12a4363a3f76b65521de4a1223732fdee3715cddbabaa26c828d9ece3205. 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/COAF42390113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70f823be764fa0b58c9fb45194719cae0b47df74817b318a19618971340a05d. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/COAF42290242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ddfe8bb3f81d675b78660a08098b9a20b3e347f30d509ba132d2ebb156ec6b. 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/ARIXB2205624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6987a3543f2d514ce90fa2357c88cdada0c4187424cf78d1d5b26ca56f4502d. 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/COAF42290205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4450c37794779cb69c6fca19bf9faed5478ee95b24fe186529adb1824c32114f. 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/COAF42291755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96b51f7d17af434503e31ac9232c7f97ffab25e6391d78a80d53c1705d1e7b3. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/IL6652203987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e47644a2d26c2b5850baa3354f02c4e7ff0045144333e05c3b9d63a378dc66. 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/IL6652203985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f8c2b2c6e8c78bacbe167ec54188fe632cf282c8cbc1c8f3afecd57c9fe3e0. 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/USUM72109732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb711b1c576d8532293a9960526c1cde04cff0ef64601465bd40193be3f30f2. 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/ESA012117510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d42cc879bdf51bb131158dbc5d1ceb9111b8f002e2b4610a837f415ff601007. 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/QM6MZ2472291.