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 0x08b19e49a1f6e136ed6ee740e475c73b66bd59a91c48f451f4575abd5e483404. 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/c3880426-1525-44bc-bd38-a3ac1923b1e3.json and https://artists.proofprofile.net/proofs/artist/c3880426-1525-44bc-bd38-a3ac1923b1e3.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 0xe4e8dcf7d08b4a5af78bee96c24ce7513adcbe36904107a6be943d77c633acf1. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/BR4TF2200919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59525e2979694f276f2a9a26173054e0eafdaf5d884c04dbd8cdee3d8dfd04c3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BR4TF2200924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f06740c8572ba03d2b5d1566e73044fa9b89e44ce85968e463510fddb21a596. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/BR4TF2200923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78978232dd9b26d62f23454e1f8203283799aa43f6513cef27eb68b30c21ddfb. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BR4TF2200296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d569b85077f807bc12214042672a6d0987198678e4870a14cb2fb3229d66a2. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/BR4TF2200619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171fded1b2ff1ffe249adb79af313f37870c240e39577f9f6f4c932b8626e78d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BR4TF2200623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6d03289503e109eb8564ceca28767a7cbb8d3e920796670ff33d7a7172d753. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/BX44O2301152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb661f4e9cf25f42cea2cc19d260ff5abafc8d6ef1aaab7fdd194dc7f57d86b04. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/BX44O2301240.
Medley: Sem Deus Não Dá / Era a Mão de Deus (Ao Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49ad49d69d47a29d5b031229be6934b54f771f639e2d4d8c1d6f8201a82deb2. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/BX44O2302200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17017308941952a5184698a8170fff0dfc4c03942c22a1b1e0cc534c02e1319b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BX4402400980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515841a8d4e1d95061af8bb04ea471f04b3ddcc49e391882354680fd73b528a8. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/BX44O2401490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3b27814285253d16aa524713738b4e569dcccccf48f94b01749d0846884e59. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BX44O2404323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a60d08dd294412155a57f0be4e28775ea45acd3738125f0d36254084c359ba. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZW9M2415132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2710ececdfe0374a83c0bf31650e5ed6cd8e995640c4c94d5be4f6f56fb7b32d. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/BX44O2500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcade108912e3135f8bcb4b8aa90abac3f0b46c5a040c34572b0ec472f9a40f40. 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/BX44O2403148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcade108912e3135f8bcb4b8aa90abac3f0b46c5a040c34572b0ec472f9a40f40. 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/BX44O2403148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c65facc5389fd5ead45621dea647904e10554ee072b247d2b69dd2bcdc1ba95. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/BX44O2403149.