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 0x2c66a5a09a382cff8d5d2106d9fcd6b5cbd256ff0e52e9a0406891af4c872b8b. 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/f74e95f8-4082-4d34-a579-536a2c4c25af.json and https://artists.proofprofile.net/proofs/artist/f74e95f8-4082-4d34-a579-536a2c4c25af.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 0x013d0dcc48736ba3c55e5c2f573a0e72881d27d84c72df0f0ba858adfb024ffd. 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/BKFUX2305474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5696bbdffc15f6f2ecb60794298f7b61439c5e82510e2c06e478256ab8a5c029. 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/BKFUX2305481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916cec444f805eadad4692bd774b19b4a449da586d50645e8ac8133b5c365837. 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/BKFUX2305482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab351ec0a889c0a7b88427603adb51b9a899b4c43f22edba0c3960f41fa0bef. 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/BKFUX2305453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33542bdc13d1c1b0ffe6493021eb7b41f4e2716fc46feb46e1af103144803980. 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/BKFUX2301665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67c4b7945923aab36716a8d8fb901fd72049bf7c052c7df6d54d17f84a850e0. 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/BKFUX2305472.
Automotivo Modern Tetris - Brazilian Phonk
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372c7da76736ff6e562bd45f8d42e4218bdd53cf46b29f10c8c1ee4e43b14506. 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/BKFUX2305510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb23e5b2d0cfeec368a9d7544b688dfd103998de53121dc1676b114998de0b3. 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/BKFUX2305493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2626bc84f6c2558c8044a7e79e7bc0840c28ab8cce7be92f8cbf0a6106538e4. 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/BKFUX2305494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec219ddbdf85e9fc2fed5ce8a4ce69543df0c9021b81c94a929ff097dc709d2d. 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/BKFUX2305495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c19ef2504f4da4205ca7566aabd3564c6d5d891d6baee14629e1b34d5c7d951. 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/BKFUX2305496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb23e5b2d0cfeec368a9d7544b688dfd103998de53121dc1676b114998de0b3. 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/BKFUX2305493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2626bc84f6c2558c8044a7e79e7bc0840c28ab8cce7be92f8cbf0a6106538e4. 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/BKFUX2305494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c19ef2504f4da4205ca7566aabd3564c6d5d891d6baee14629e1b34d5c7d951. 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/BKFUX2305496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242fc7cfcc12ca7a3a265ab1566f1763b8e938af278a1d62b9c2fd4ee10d6cce. 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/BKFUX2301618.
Automotivo Bruxaria Uh Papai Chegou (Slowed)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c480edf57723b6f5d4061fb90effeb9e5be96c151ea5824c50e73ba7c7a6ec. 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/BKFUX2301620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878b23e850f205a36daba0561d70c5c311eb62710ab5e10919e33d444bdc0681. 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/BKFUX2301535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa410c0abeb3e21014967b45be6a17a2f9640354375ea7a9a9a12439bcbc7eac0. 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/BX4IU2409440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedcf87361a8c58dbd161ab89d6aee20f0c398723528528cd508562396439a31. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QMFMG2367750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375262e32685f06b12bae58209bb75bf6699ee8f50e6308cfea0e203ba1f3f69. 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/BKFUX2305419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389c8119b3a912ae6351d866661f606ff79c51e2918282177bc542976b21f6e6. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T15:34:35Z), 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/BKFUX2305367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf66011f10195c54115363f41117c7374031b1cb2dfab3bc11f818d35c612d2. 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/BKSAI2300057.