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 0x0a4475d71cf074e888bcee2f11e2c06de3f1dd94aac32955bb6caf4adab85ef1. 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/e5fb97e8-bb64-44e0-9f71-34423bbc00fa.json and https://artists.proofprofile.net/proofs/artist/e5fb97e8-bb64-44e0-9f71-34423bbc00fa.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 0x8cd4e33d88b7af9417cd166bd9734ad6d3a284270308f09288d596fc58a8f087. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/FR2X41400795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49881b399e7cae117cfa199912883a1f200098d198b80c34753123f680d6a86. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FR2X41400799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3db415703135cadb4923c8eb8ca576e930ac3d388380011c169ef2929d06b3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR2X41400801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2975455e47e5b98ce26b9cbaaf20f185793248d4b032342c310354df1412b501. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR2X41400806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dac52b75272a3521361efd0aa78e69d0acaebe1958a48b04f38affcd0cac7e8. 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/FR10S1498007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69fe3575eccde30bf0e6b0e53091e6273a79ae891700bb1c46bae0f1453db46. 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/FR10S1498009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ed25f847b187121c607d58dd1a7349a5ba44a94fe5b1d1a200d38c846ea78e. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/FR10S1797798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fac5ac45d4ed3f7bc9fd4039c62a8827e6a4e4d4bca636c7ce5a78df2ca30c7. 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/FR2X41707574.
Que Parezca Diciembre (El Señor del Pacífico)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554c4e1f52f429783ca518bdff053da9d0b296c8486e6a48a3b59259281cde62. 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/QZHZ51947279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea18c454c5ea11294aa5d14dd40ef51fa87a40d9878f51b5ff2090a8713b897. 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/US3Z42000097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f1a43fee570d619ed47434516855daaf6b7e9c723640642ecfb6156e53f7f5. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/FRX762045763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f0c7308b534144b8a0f301102a672124b282bd91ea9175035e30bd96db8e95. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DGA062066813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a775ed6c757fe504baf7bc07fb5758f1235df6456a279696beede345ffa3a4. 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/QZK6Q2168614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81912d46d0a15507fe99e93fb25f169d0fd40861d61670ef67c69648a253b588. 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/QM4TX2055663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d39a1c9cc11c5c3ca9cafddd0f8616a2e315cd26fa3d419ce5b200131f44b6. 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/TCADQ1896643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae75a759f37415d7f06977b8688537e2bf902c3369ca7a8624e70ea8b2700702. 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/UKXN21933104.