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 0x88612183d894c631521eb2b50d5df2db8ccdc85d9aa236b3971703aa55d82d7d. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97fc30c6-1fd4-4645-9e15-2f51b695c669.json and https://artists.proofprofile.net/proofs/artist/97fc30c6-1fd4-4645-9e15-2f51b695c669.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 0x4e770f2b2e41e3eecaf14a922333e7b0d8875af740354d1f3dfbb3f0f2f5d8ac. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/NOCA32001010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fce02babeb6e1567a81e700e3bc19a15f0cacf00ba1b75cfe78b170e45747d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NOCA32104010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce70f946a0df71acb8417bd3fee2f8549f9b47402a3cbe5b61658592446f04f9. 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/NOCA32404010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef33480913d0d33b31b581cbb12ab18b8260c709e5fd4abd87e6e26d445bcee. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/NOCA32408020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74eeca6da5c60238fba5b150f6aa3d72cd086e28f13a37f1893c7a1b5c01d085. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:49:13Z), 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/NOCA32408030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07fa4629635a6f0968867e655187aa4951a5e20e33df25a20d21f5502414ffc. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/NOCA32405010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bad6ef246e477ff67d1602dd6ed70ca4bd79aaecf3c03c9ba1b539d621096a5. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:51:43Z), 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/NOCA32402010.