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 0x4ac081c9f56b89591b4f831d146952a175215651647a867f8712429e86983900. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da127e34-17f7-4ffb-8f98-8a4753c99d9f.json and https://artists.proofprofile.net/proofs/artist/da127e34-17f7-4ffb-8f98-8a4753c99d9f.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 0xeaefd6bf3f918c0a7e2c11b3fafacfe42d56f9b4296c9b35903b367015009914. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAIZ2470389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95fee57c9751ff98b95b0e80414c9917c868adca5642fa0ab7303788a1e5dee. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAJL2508813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41f623a69c376a6a6a72b13315c132c96b69e1c081e560884b5b8d041b561d7. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCAJM2543965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ed2c92db463e12288e9ad1ca1946c94cd5bc398987341cf94aed3ded367505. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAJH2509750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6666cc293f7c766821d02ad8e6822130ab22e71a0cf66ea6fa4ed8edbbe046. 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/TCAJG2595008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10abe0957efd3e76d656dc752ca0be07be41402ffe91e9555b6ca4112af1e10. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/TCAJN2552912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e92c142e66b9d029ae917f335b641aebc07175f214535b486021df0b27636de. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAJG2502272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7922dd368b459d92ea892219a27de124e955ff3fcc0bb9174f57c2f0a6c6140. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/TCAJR2509954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea56847fd1035d41e76528809ce85835c84664119d029912018c7808ad32514. 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/TCAJT2535608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb7893a481e046271a25492a8aaa52667182d008ee885de83be38b1b4b98acd. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCAJT2544515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467d4273f522b434e99ad5de7a85774b5a7a8b8f5f9053808589563092286385. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:09:24Z), 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/TCAJU2517619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330551cecd11766f775c21724b2c6e5f24fdf0207c836280a6420011de32e8d1. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAJG2581947.