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 0x9207e3fbd94db9e501511df58dc197c02da3680dc98735c88d0dc56201d4295b. 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/887deaaf-7fde-4bd3-8410-40885b507ea8.json and https://artists.proofprofile.net/proofs/artist/887deaaf-7fde-4bd3-8410-40885b507ea8.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 0x6c202e5c1b9438000a02db01d70f7603bf825a192d6b4529006785f42352785c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BR04C1190003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b04979324ddd438a02d4ae5c64bc1c16aefbc6bf169e87b919902954b04fbe. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BRRGE1404108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc992f4278aee5e3bb281a2f409ce2138b2f6093b7be65de10604750c9f296be1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BRRGE1404106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4dbbd298fc8627dfd087b373549d5ca7b258e4adfde6f1588cde0d30d3ebbca. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/BRRGE1404101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140b2d0ca2b82c47a04d37d71ade3f529b5c0cb3f39e684a1ff2d9ac8b77a8ab. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/BRRGE1404110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080db39195427919c7ac9b2eae63b65fae6566f7d5466756ac38c9bd125581ee. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BRRGE1404109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4072b6f62f96e103625798e6c63f8b7e18311dd178b38cea416d46ca56190f1. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/BRRGE1404105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080c3b070a8de79a0d5d0a04edc160a8448ebae0408564de426e8cd68025e5c9. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:08:59Z), 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/BRRGE1404104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4bace24092a871a1a40d60413b6b87a08ee3ed632a030f10d4a3d0992b891ab. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/BRRGE1404102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd4fb3484bc7312dbe9887463f8196480820da9cddfeb0c067ef8520d69b68f. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/BRRGE1404100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f6dec95316dbfe67d7a08c86c7b7032b5044778eefd9713038fde710df20b2. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:04:07Z), 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/BRUM71900390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e8577c69e8cc8e5dcf59dca376632f56cfc0a07ef2b6252770f3f5f1eba946. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:22:26Z), 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/BRUV71900887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ddd2fa8f5e2aec8a84514b017beba2f231331b4e083a090da993fb956f18454. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BRUM72002421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe895b946bdd3d3668b60b6c6478ec8525de84d6f42520d0fc610007d546624c0. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/BRUM72002419.
Cigana (Ao Vivo No Rio De Janeiro / 2020)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd757b30f82ea1a98bcf7d7f3fc3f49aa30ad5713c61ad92dc1d39b604a1e154. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BRUM72002993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3d58d1b55b415439b2533a911405a19338e07dd096bb263dcc27a38e8fbe2e. 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/BRUM72201009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde701e85bc5c34464dbb78523e143b586bde82b9b8a2d5a76d5930433c00335. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/BRUM72201008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6e1d952b37247e0cc1434053e8b3b635f11cfde3882dbd86c770dd4433811e. 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/BRUKM1500120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a3d1c605b8f56386a1bd798e3bc5a4455aa8da09c0fb45e7e5290915ded072. 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/BXDFR2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e54fd6b2279a4fe23eb9bdd9d6dee162d9b7cc24e0bf7e599f84d05258551f. 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/BRECI1700054.