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 0xfa69d126bc45450a681eba83807aacf5678cc20b0e0237cedab617ab376c46d8. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/871d627d-932c-4d76-84be-4f8d4b7b3893.json and https://artists.proofprofile.net/proofs/artist/871d627d-932c-4d76-84be-4f8d4b7b3893.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 0x5023dbf9917bcb24d868625ad2f918b61b0cd458bfed516ce5534027934d03ff. 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/BRPOU0300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8f07c8f7c00f12c29790cc81f5885455b7c9e78c3db5f8e31f9b35c146814e. 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/BRPOU0300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02942f33872ec922e28b111bffddc28671de9100af590cc309497c7c911281d7. 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/BRPOU0300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cf4713280c2d9979664e0db587c2d36f5f4e89e61b6b259ce0b03395c4e122. 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/BRPOU0300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c7701457c7ef8922e60f4c81714d0877a8e3a4d69af2ab84dbff8827e8eef4. 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/BRPOU0300073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d126380156a5c2f2cdc3e1369a321fb7c9dd88adf441ddc6442c01013735fb. 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/BRPOU0300074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e73e99f8e9b6042ce9b323f5935fcd18ef839b4f32ca6c7f062f1200047428. 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/BRPOU0300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987d0419386cd3b635f18a1ccf565486067141bc7f29541f369687d2cd6a29b3. 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/BRPOU0300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7503afcd26ee557d207d303e7df7dda2027927f262991b759c117316916b72a4. 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/BRPOU0300075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35acdbcb014e949393496373a1aacf4066be66638a5f0072abe0356e6a7e5f0d. 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/BRPOU0300076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a15193fbf63cb18f5d8d545cefccdcfbae3ecac36aeaa387bb52f530d98456. 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/BRPOU0300077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd253dc60fdb1e8f3804f5d1a5887d9b93a204571032a54c5e79c4efc929660d6. 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/BRPOU0300078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614ca120ac92f4dee4fdfc08f0bb74f30e1cbc9153b391a610942e84ab7c0dc0. 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/BRPOU0300080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5349ae3b2195d8b3508a20d5d431a6be298a83247059811e70e0013c9c8f7981. 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/BRPOU0300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41de30b59a65e7c76266f317bc711884e09000cafd44e22e59c54a17bafdcc3. 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/BRPOU0300082.
Orquestra Nzinga de Berimbaus - Versão 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983f3a1e0f430fb60d88c2c4812a11bf0654a7ef32285c5fa8cf9c679548f9d5. 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/BRPOU0300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e7069095d517670967d197fd58a605a5f5578c776904e5cc27aa6217fc3c2f. 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/BRPOU0300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856c1cefe7824bb7c155d912f4103088eb421b4818578424b67b9f4679f8195f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRPOU0300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53248bd4da3e6e15a8a7ce67c7a216dcea1c5bc42f2810e4844d8f4fdd5fa3c2. 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/BRPOU0300084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c82693949bb29fedb89b7e897a8e560527a76d9875c6b0fd212eae479cbe04. 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/BRPOU0300085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f429d761ae68b608d2e32a34edceb41b279e7654a0bd91197afa0674a69485. 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/BRPOU0300086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9576e89ef375b3712bac8f83cdb469d5f28ecce3ecc14f02900ab2e4040b57d5. 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/BRPOU0300087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5b6256ca0214e9280232a69c69e5147d5095a88d2458c49629e405f25adf77. 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/BRPOU0300088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76e4f4d58fa9f689902ab87f43326d0f4a28c18bd97cc6ca1fcfeefa56dc295. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRPOU0300089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ea365b87a84b6d6da0ce38dae4fc2e81eabdd6184d7eab4eac3561ee11e72b. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/BRPOU0300090.
Orquestra Nzinga de Berimbaus - Versão 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7003047e69bd9dfa6fd1cb5343f37b9a9416773c5f6d4daaf8ef4aa39d57e874. 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/BRPOU0300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84917b25eff1bb18d0a083e321e3cf0426f31c8ed0a6e9edb2520bf5be4fd9ce. 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/BRPOU0300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380261e22942ad8f2f2bf2ecb9d45c7fa66427a11cbced8a1b41eeec26f54cb8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRPOU0300091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f07bdce610f362fed7ff7c700d47c3e61ba06a0651f40e16f405a386513b19d. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/BRPOU0300092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05741a3091ee9823d473f2ac18f834f739ae8f5a34d595b11c19ab506016e2b5. 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/BRPOU0300093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543e3713c102dd9ac97467ec1597a4d99131353d8352c4be16659d7c353b7768. 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/BRPOU0300095.
Orquestra Nzinga de Berimbaus - Versão 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3569da8c3c685ec451705fdc422b20092f056b14ea1bd33cd696dbc838aeac. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRPOU0300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9034484c89968b0f25c74068f81274ff34506f48163a46716cf81793ebd3ee. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/BRPOU0300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4843b9a83788cf41a5948a98579635bbe2b17d7be1b23b447051bfd8d43d435d. 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/BRPOU0300096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4284194ff703b1cf57f7f632b81fd808f5c9f1bc01e9bb6913f3dda0cb939db. 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/BRPOU0300097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf2be0d5870e22c5fb0baa4510132f1676994d864fb4921241eabd0346c9a86. 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/BRPOU0300098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba362917279f1aae4d49e8cb61889a8378b77a7d95bf0067654deede819bdbb5. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BRPOU0300099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb7967fa81af604d789f56b23de0b805d2aacbd678a23aed290f8f6ab30ce23. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/BRPOU0300100.