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 0x0b2f240a6ce8cf8ff3c2735a963598553cb900507252e8733b3f19029e56ec77. 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/da695c57-ecdc-47e4-85b7-6ec098551d30.json and https://artists.proofprofile.net/proofs/artist/da695c57-ecdc-47e4-85b7-6ec098551d30.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 0x769872ee868649cb26d8c9dae104707300fb628ff24d7339e24ad2c38a12abf3. 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/USHM81583334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b78248cc6417e70acfefabe53133fb798c71a65eb15d69b2a4d39388dca933f. 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/USHM81583340.
Estamos em Festa / Festa do Rei Jesus / Eu Tenho Paz Como um Rio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c0d5c392746fd979eef1bf436a94b544d91d476857fe238dd26d7462f2d464. 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/USHM81583345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4798f9f5fe49458f1b8e5647d698f4d2d3c8cc31e0cb300c78a188db1032fe. 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/USCGH1609651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ea66cba97c4042c8f6382f6cc4e2518e7f84855ddb5b6d5a939f0766d5c7b5. 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/USCGH1609662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644dd043a3037545a31b6eb5f41ce18ee2e316a3f01ae9457d367c49bddb9915. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USDY41632302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cae7a5f5277241e2db0b23c92feda5847086e96a8cb1236dd0cb40b83b02fab. 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/USDY41632304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d5e104f1c91a9574d79763dea04ab168184cb595b6653191a9c13be573eb6d. 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/USDY41632305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727d78564a1541ef62112f9d745bc9d92bc960db727f716e7b4ce54caa33dbfd. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/USDY41626601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8268dac9c7e6922b0ae060b028e4a125409ead61dd145fb7e5d4e9f5a5e2ac. 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/USDY41626604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce51df58bee4d0b78afa8c1ef1816d909a7958037d213d493fa9ec1fd0b6cdc. 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/USCGJ1604052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598525a6f25183c3a35743d54d4fceb13968f293e73dab6059fd22af79030f04. 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/USDY41651005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b38b153c85f6f72e0ad78ec117a85bf1a6f37d3e6a663a9aca419aea92e0dcb. 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/USHM21565293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca493b31343d9430a91717094919232318a1596f48af61ac50d737a794748d4c. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USHM81431081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2179b6241a6cc50c4edcd900d859593c369ea06377a5fb583acdfa6299cc9f43. 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/USHM81431082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cff9bfafbd412000ae088b9f04862ba5dea7a34d02ba5709806e6e430ea510f. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USHM81431083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67175f4be160b45a9a1a31d771cc5ea51d9724ce5500f7c6d0c9cdd200ac79b7. 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/USHM81431084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbf7a512497523af095cd674d7630f9e6cba9474db8fa2be82ca774769670cd. 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/USHM81431085.
Medley (O Dia de Deus / Mais uma Chance / Valei-Me, São José)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6768bf47b2ab2240ab19c432f1f19308ae1a5b03190d056e724a159b59f8889f. 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/USHM81431086.