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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a7f91279990da3f29cfc80918809cfee996a36ae1528a1403e7990aabe2273. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/67c3def6-9740-4b30-8db9-fadbbcf5c799.json and https://artists.proofprofile.net/proofs/artist/67c3def6-9740-4b30-8db9-fadbbcf5c799.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16a0bf2f98bf6b9e9b739f7b1d896f490e16914cb20d0fcffcf1fbd292fe098. 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/BRJ051700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a04ded5a2e8eafdcfb7ab85a1c0e514ade27eadeb95e7ef21b486b0fb91fa5. 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/BRJ051700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31930e6a81df6cf30115540c00b207d29c5b380315a5ecddf4e812428f3a0af7. 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/BRJ051700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591c63237643a24947df9911435c19f8363b9a257a7e9cbd8789fb57b3330801. 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/BRJ051700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a8c08b403518b81b0750e467b10c65e559544958820aa80017aa28551c4d83. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BRJ051700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765f8d47020fa2514fa531c832f938b3a7660e848d34075ea7541266beda61df. 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/BRJ051700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9962d280c009f2fcd14ebda982aa820dc8ddaa1e083cbead3641395d2fbbf9ef. 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/BRJ051700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d247016026f687385d044e85f6b7f860b0550b4cd632eaa4bcbd29c4e7dfdeb. 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/BRJ051700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11726d317262a0c897ef20e1bc0b46c3e4cdbed16f8fffec280d659555685be. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BRJ051700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be980c2bfcb854339bd1a77be9fb13d59d3acbbbf43e26fd82500574f38cf39. 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/BRJ051700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935e99001f8f5e7c510f14f54ee7d889c229b368d6be56d5ea69b7d3a7d0f4cf. 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/BRJ051700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd993cf3d5923ff186d1dc50ec459fbc33dd597c4be47147795a4cacfb02fe94a. 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/BRJ051700023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3a59134d431ed0bd1df0c732eb9899e84247788430355cd080ee8e07d23a48. 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/BRJ051700026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc876e5188d11880a28f2288224b3214a6464eb16227950f4f8dc3123f7718c81. 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/BRJ051700029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bc916140107f5538dfff2686a17eb9930a19ed66be56bbb4cec030fb582d77. 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/BRJ051700001.
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
Eu Sou Negra do Rosário / Imitando Sabiá
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60528295e5ff2449e81e3e8f7677cbac37ac03a961187b9645fb018dd28094b2. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/BRJ051700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2b4a2467f5e8df333c9a497f525338a99d2a396d3828f42cc5d41febd32398. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BRJ051700005.
Pilão de Massambique / Moçambique de Nêgo Velho
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30ced475ac8d17b539b75a24fd5988dec1f1404fefddbc709b1306cc6c8140b. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/BRJ051700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fe94388df5be6d0a40d908fa33b406d89c58e6a10c78bd7c5e7e822c2c42bb. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/BRJ051700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585bbc4e3eeb6103f7af5751cd5418184991949463af643d721ee5c5100da56c. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/BRJ051700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941af930aba79b1b9244fdde7f89216758108afd607cf997746afd77ddf957ff. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/BRJ051700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db0990adb1707b8fac3ef1588304059b643036b0e93ac4d5955dea12fe445fe. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/BRJ051700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43105ddda0a4d71561c8a8c255f96d714b018c3afc3eccea84d999860eef3d51. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/BRJ051700025.