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 0x8a67e7df92f3175828d851c402ad26fc5d73026da69d69c92a3f6fc27954bad5. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3eb6cb16-2ba7-4ebc-9b0a-2185de8cde83.json and https://artists.proofprofile.net/proofs/artist/3eb6cb16-2ba7-4ebc-9b0a-2185de8cde83.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 0xe0d6e9cf1cdab426b1697984105e0c5a44b13833f57cf80112401ab6e5640ca6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PL1I22500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bef196f3be3680313dbc3715456f57db75fad314a03d8b97f1b5ca63d3acaa. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/PL1I22500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bde0f301b57da7b286e894472c914d54838c764cbde9aa139bebbec33f6e5a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:42:10Z), 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/PL1I22500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48bd2121f02713123b75a14c5b0bc23f0b005650b7d7fa1eb46ec2164cfa828. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/PL1I22500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d6e9cf1cdab426b1697984105e0c5a44b13833f57cf80112401ab6e5640ca6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/PL1I22500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bef196f3be3680313dbc3715456f57db75fad314a03d8b97f1b5ca63d3acaa. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/PL1I22500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f1c819620950b7b5cb297cd83a26f2ce86b21774e21edf7b01311652d47975. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/PL1I22500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c76cba2c8afa1a100e9ba29e92714ba8c4a1bea89e8c04d883eb679d405e087. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PL1I22500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14284e049dd15099e943fcf55d7ee6cc6731fc571c25acc088f33326e1c24057. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PL1I22500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf537701840485c4e666a6982b6cd38bf6d1ec0dd32d680f36f240dee738e0d7e. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/PL1I22500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305257e094fb6448ad1e629dda042d5449c9e6f76141f6128c244514380c3fa0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/PL1I22500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1fb229e6a7dd2058c5f68916b4b67356e6ace700b1e0c6e602c10d6e4cc057. 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/PL1I22500010.