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 0x4f08d61fd8ea2623ce58ee8aaf222f7a72024bce372a1cf24b4047ea0f7b52f9. 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/2899ae9b-8628-4b6b-9d6c-ada12b9afdc5.json and https://artists.proofprofile.net/proofs/artist/2899ae9b-8628-4b6b-9d6c-ada12b9afdc5.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 0x2db2f287bd85001d1fc2ea81c583699b5888e6c164351523d9697f70402d78e1. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/BRPUI0600418.
Aracy de Almeida: A Rainha dos Parangolés
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd12c6cc0277e5d38752e90dfb7bf33e0641dff80bda051520f1acc1a5df0e3. 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/BRMSR2100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d445a24070a6b4c526a0eb01fc5bda9b09f4c8e68c07de1d0cebb70f09422f0. 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/BRMSR2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1340952fe7b38f2637807791c83af695d550a23175a2f5e4a046a94dc3429a94. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BRMSR2100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887cc9bd70d9da6b5e4b9be19d87950ae82efc13a0af271be79c668c2f6954e6. 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/BRMSR2100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95da7b501c15efce5954799bba84337ad36d789cbe4102fc8e30e210900b870. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BRMSR2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba19f89caf8c3cae56412f26f2393dd9c395d757660f0324d6770c95195e82f. 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/BRMSR2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb633e1c5f2e254184901167795977cf25080d78a2c14b21951bef46de12a3a. 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/BRMSR2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a149e36feb4041b4f141327a48cb4eb59a804d640e7ac364f47efa3a18eb363. 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/BRMSR2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7914a2eaff1310183735e71cbff10863c7887e820322a0d4d86b1bc5dc91aad8. 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/BRMSR2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6250fb402e49c1876336e79370c945f87c9f96d668728afea484c2f10c063602. 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/BRMSR2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f46222bc2e82d95d3b36ecb94ade8de5399261d1afcb72ebbcaa1a4a322ade. 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/BRMSR2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ec54f76749ae8550ece081db69163095917c5eb2bad7eb8462a8f7de66fae1. 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/BRMSR2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b5b548d12d92a951e216df6826f006cf457f0b4af1364f2574f74abb564ce4. 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/BRMSR2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ca682531c86a4ca9b1d8e374339f10a05bfce8ff2668f01970156e7ab743ae. 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/BRMSR2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a528acbeb1d234536ddb449e1da40512c4578457227b66e17eec07742315ac. 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/BRMSR2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc549d3dc93ae170de31d300be0cf8048ab5971b8b71ab83bb6fbd20a51767c. 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/BRMSR2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b10b849c020b22032e46073c88554ed26be81a5c276038499ca35feba7af189. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/BXSVC2200296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c72a0f456247bab190629f361f7bb35ac4779943cf712a0cee3128b41ecae7. 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/BRNUQ1400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c420aa5be42fe49063ef642bda41ec189f02ac5134ffdb37c0bf702de2df1e. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/BRKMM1300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbec76748687b1f0041283ec57c702de77985488e7e0f332aa0a8c4b8827bd7. 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/BRPUI0600411.