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 0xcc06a8a2a793b9ebf69f568f47d3d59f40eaaeb44501b987bb131bd6b6ec3b22. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3731f7d7-6b01-476c-8bc1-553026087200.json and https://artists.proofprofile.net/proofs/artist/3731f7d7-6b01-476c-8bc1-553026087200.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 0xe449838ab4cb9a0cd925bd380b394d51ada45dfbee5e6052bee5366512a5c26e. 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/TCABS1490118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5e11bb80ccaac45e3cb8905a63b914fee18f0f93b9d68a3f70e3de6d55f42e. 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/TCABS1490129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba868969c5baab14fc632de05b5d355217350dbc703dd85dad8148f82564602. 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/TCABY1407215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb1b53da01f98a805de869e7703eb851ad17329ad72a1e2321407788cf5ca04. 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/TCABY1407216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d8f95a3b33ad0722d58aecb90bb7373abd20667265dc3e52232f0e21d180e9. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/TCABY1407217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44ae02fe3bcfd9acb65e5bd6fc03516406090a9b91aa7f3b1e4e2ceb26b3dac. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCABY1407220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d69e2ca732ce3814ea0bed9ef477ccd86eed189a89f71af4860ee5e0d02839a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAEH1965197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2897009b56759337c2fb2cb3dfa318ad123338cfe5e1a272c0e94bdc0723871f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:17:30Z), 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/TCAEH1965201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34c645dc988838ed082cfc4422f95044f0fd945287fe319f9e972a73acd26dc. 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/TCAEH1965202.