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 0x0d48ed35dcd7643467e6af1a34898289cd358fa19541b4828fabfeae2efe691b. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f84c2fb4-29e1-4bf0-ba37-2c89606a92f1.json and https://artists.proofprofile.net/proofs/artist/f84c2fb4-29e1-4bf0-ba37-2c89606a92f1.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 0x0cb9b3759408660006d6baef5e5fb7e45576915dde501cde94b70f96c21a2101. 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/UKZ6W2002025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d228aad97d35d635cde784fc31a922e2b1675a85e50e9a0bff2a952bfb22dfa. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/UKZ6W2002026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3ce135d7e311b0f0a6190b1f47980253effdb26b23b25970bb7d5fb0e616d0. 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/GBFG92200169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce4b6fa88ead3924597d6b91e5d007dfea7622ba5dbed8b9ea84a191c68d0e8. 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/GBKQU2462423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4bb5a0a5a5ca56d224023e940addefa8e2b259656b222d3b1cfa929629b199. 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/UKZ6W2002028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391b3f5e1c299090b94b929558d4d233b14418ce03fd7abd3ef16e1262b8c2f3. 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/UKZ6W2002029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba1b3e80fa53eda5447e0734d4d5cb7d3af07661e546cfbaa2c7d6094b60877. 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/UKZ6W2002035.
In Effect - DJ Sy, DJ Unknown & Temptation Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b360c6df17a8070026d2d75292261e2eddf341141cd6089db62a177184e221e. 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/UKZ6W2002036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b8c7742602193ba380f27076c8370db4fc2bf6d743deff04d3dd22a645eec2. 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/UKZ6W2002000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5278060f4c810e497cc79b6ce5a6bae26c80d513a2932ae35f72fd1f78d6273. 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/UKZ6W2002001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2be02bf304ed09cafeb782fc8a7c8aa2affd35baf6fb9a88029302105a9bdc. 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/UKZ6W2002002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04970768f13b166b98cc9043b35171acf6e1d65eb0c03d0364e015f932b577b7. 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/UKZ6W2002015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afdc6dd5ed4180bcd227c282c95cd579d7fb9a9f0c46e6ef22680eb2db15138. 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/UKZ6W2002016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230c4b55be4d2d629e021679d3ce0f8f68ed66139558b478baa09bfc5d13e1c1. 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/UKZ6W2002017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5218dee96556f30e9307ecd293a0ec780fbb7f94a4ceb4fa6fee88040c1e6f2. 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/UKZ6W2002018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93597500fcbc617f415b4a69381a1fe71a99858f67f7d9bcaac90cc079f0c27. 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/UKZ6W2002032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aeb590685397ce6e2d0639496c61b78a8b83345eb9da53776db885d456ed393. 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/UKZ6W2002033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba800701d47044e83ab90a4c6752601c3a7d585aafc7624affe0ee10906b6e4a. 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/UKZ6W2002020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51fdcdd878e1a7e2c324bd86f5aa823261ee030ec3d2078b8d4a542165369911. 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/UKZ6W2002021.