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 0xaceaa70d8b966fafa34b4d4308c56207cf91dfbcf38896d53f5b1c220584337f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/486ae399-18cd-4d38-9fbc-ae79fa83bc2e.json and https://artists.proofprofile.net/proofs/artist/486ae399-18cd-4d38-9fbc-ae79fa83bc2e.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 0x7ea872d0f6028cf8e37d2d3537a2534145e0394f37d6e6d715f02f15e0bdde30. 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/QZHN42362589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f53fe8993574f20776ebfe6319a5edea24e067d2a1f434c02d3b78f6f7f845d. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T15:35:31Z), 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/QZHN42362590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe0894bd65150e50093832e39b7cc360cbf20b8668b792f29e202a02c0ad220. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZHN62375596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccd11a66de0f27a99fede9c8ab3c1627afab7739c66cb3e1da835dbe49246c2. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QM3DF2276273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d3bb7d95b15a6d4034a7883728a3272da7a83148d75683436b8adfedaadb69. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZTB42323103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11336113b2111fb74ad1401dc3786ebd5acbf952c73583346136c62f22aff896. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZTBE2365270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3418de0558275ac760a974364b9a7114e6dad607d8ffe3d0fa98af7d825882. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:41:34Z), 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/QZTBE2365273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bae042ef57492455492a618ef8201d5915510b20b6b9ec00c0ab5acbc446dc5. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZFZ62484032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291da2c2e00f541924d69ea39c6ac80fe331e921c17f7c8680645334ade2537f. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:36:58Z), 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/QZFZ62484033.