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 0xc08d9fa5525a5100813cfbfa7701b79c0b873d54efbe8d581f0e5de14d8f6558. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bb30f084-00fe-481f-841f-2ed17bbeeb01.json and https://artists.proofprofile.net/proofs/artist/bb30f084-00fe-481f-841f-2ed17bbeeb01.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 0x8f1db24238502458e11e90811df3eeef9c90ad8eac2e63bcdd59ce70cd7b027d. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:38:48Z), 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/QZK6M2328299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2968031a95dd46c9a37cab101970c0abfdb36f83af1461f17fb7ed9317af9a77. 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/QZTB52428759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc964dc4980e519932de9ddc1bdb373363a26a45e7780a7787699c21a534047a4. 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/QZTB52428760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39dfd8cea67d15f4d37e0d5bf66a58967f695ffb2c8160750eb5e69b42138fcd. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZTB52428761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036d3dc87abe8964b86cbfca771b4b8f7d517ee366be5d9805501c17852f6bd1. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:28:24Z), 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/QZTB52428762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf8a1e6a805cb05e63e7ce75088cd389fe8f4e6ab7cf39d1480910343d5599a. 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/QZTB52428763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39330cf939449aab474699812d9d13120994912569b4ba562d8f9c802a48a3d. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZTB52428764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c46c207c4259010537f87031a27abd90a2d8c69af6930e56fd9fe8628e15207. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:20:41Z), 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/QZTB52428765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb51edb9251d2dd905c05b9aba791a21dfc380fc2fa9ab096573805e20a25ab0. 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/QZTB52428766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e394d5c2934149d124fab099903695b255173110060eda40d707dccf7881e4. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:02:18Z), 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/QZTB52428767.