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 0x0cf6733e629698b0021a460c5d22be8128d53efe8c5c1cc04cb532a66350ea79. 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/eeb81c6d-a9da-41c8-b88e-35f0e08b053c.json and https://artists.proofprofile.net/proofs/artist/eeb81c6d-a9da-41c8-b88e-35f0e08b053c.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 0xb934068148d93991c22076ac35cdcb83df697b1e33795c811b6b42d61d386101. 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/QZZ8A2578805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9318dbf7ebfa91d1c3d10db640357203b9f771712226cb195bc23178b4b119a1. 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/BRSVB2518139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b73c386a7aa8c191997f9853b74c8011d45de8f11b5915fe163a0eefed7e610. 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/QZWDE2421420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10072ad115abab5001e72cdb3a9c665dc6fcd1bcee170051521de58fb708eb7c. 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/BKCMX2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5759427ab2d5d69e46d9b094d10763a89d06b6fe7d20a61170919ad6c06d05. 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/QZNJW2402613.
Hobby das Safadas x Vai Ser No Beco Do Alto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b8808558f17fe1d81914a070d6b5ab346a601ac0a64e033314c566d955f120. 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/QZZEB2330209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396a74f771224df3caecfb764fb66bc55e43df29152b68c4be3b0b3dd8e4a361. 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/QZNJY2323910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8788ebce64a4479711b2724f30e7534177cbb8f2e8efc4b5d299ada329b097c4. 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/QZNJY2323911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844b2a43372364d4a155a3c5555a2f707b02635f9ee19b7b1fddb6f66fc54b94. 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/BKP9L2400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d82de3d9f66fd167eeb9b9388720c1ec03ee84b579e6c10fa14c0397881ca0. 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/QZNJV2467941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb16445442e1da4abcf8149f365d0293dcd6e555717e8ba0b0bb1dc680dc05a8. 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/BKP9L2400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8aafa97bd4b39379141413062fbf3f459271e0046872fb880396583798a4977. 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/GBWUL2420339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356ff41cc4636fb72a4232d2e78d4ce53bfeb48c9947ec0734c6e4e297299c39. 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/BCNWM2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948bdcf712afed5699617f979b138133cbc7e9aad5f17c029a3eb51853ea5c15. 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/QZZEC2320932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef41581bf72b95be409da1aa463d09154e753a0c3c3249eb97590b1a952c7193. 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/BCNWM2100176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755f75651ee96454c283839c2a5c958d29609f250289ce238002450073377cdb. 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/BCHFD2300137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f59c2540b868428fcacb383e773ade0284a304ae1a102e7e5572bd902661f24. 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/BCNWM2100121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9729ade52918d69e50ca455fa7ad107813241e0b35abb3a8b9bf1bb74dae61d9. 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/BCNWM2100089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee953e0cb6c38e28d54c3629d0c9fb5ec9084ba54fa60351cfbfcb8013db2ca. 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/BCNWM2100104.