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 0x540a794482d840cd9a0710ccb3fe00ad0ecb76980fc8755ac31d28efec6e93e6. 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/43b8e026-ca0d-4521-9596-bffd736b26d3.json and https://artists.proofprofile.net/proofs/artist/43b8e026-ca0d-4521-9596-bffd736b26d3.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 0x6f6e6bd424c6bec75cb465d387cce8b8df0cc3d630e894eda49f155c5e935c8d. 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/BXV602100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fcda584c057d73072a1993bfc41ad5d9b2c86fa20f39397590700b874080dd. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/BXV602100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4920458c22abb546862dcb162de26fbdbe44c2d7223307d3a6bace40aff51564. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BXV602100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc480733408fd4ae29bb0dafd19082ee751a48b8e29a60316bb04694c3481b0. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/BXV602100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7235609dbf774f0f12a1cd4c02d289f6e293896888c6df7a95d937cb628e00be. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/BXV602100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e76ef79adffa4001722c7752cb12b3fd49eab45e8535667615a751d2c98c0c6. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/BXV602100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aaca334161fbcb333d87be93a3c8ce06e9e7777123e700be00567729ba69de9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BCSAX2400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97295e028b156abb03dbb480ed807f4379f0cdd96f7c489fc2d970fe2abdae80. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BCSAX2400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee9079621e1e52658afd088490fc2149097d8f9644cbb1c3329e1db80d56b50. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/BCSAX2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba03f83685e5f46aa6cf280006de53522b32cf9a1c861e6d845906dcc888dc6. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/BCSAX2400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b80993d79b0e5b9d8b838c323166a7d850764efbb3998a3c695ad83d9cee007. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/BCSAX2400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621ee78520bfba69a964558b898b8f3c58c7b40aa0dc2f02ba3b6a8d53b49a82. 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/BCSAX2400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba49234069bd042025e5dbd00f6c7d1a93b6dd02d797e3ce8cd624404f395ce5. 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/BCSAX2400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ffa5c76d6e8ad71bac5fade9e467ccb57c5455e58cb75ee5b3f95c47ce5889. 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/BCSAX2400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb501ec2e3a219a80fa65fa9fd4c068a38310b5545336832507693169ba8dd97d. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/BCSAX2500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc760c9ccb3933d7c6395e52189efea1b059cd78cb099922654b8bccfae4aa12f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/BCSAX2500026.