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 0x4b4b9c6cf6384f7e67791b62ed428dfa3a35290d4334370eefb578cde0f0c94e. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca608573-7b45-4902-917a-9833331aa6ab.json and https://artists.proofprofile.net/proofs/artist/ca608573-7b45-4902-917a-9833331aa6ab.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 0x3cffe436f0dab288c23e9fd1841b4d512e59f9fa5a92f4a44c330fc0dc7a663d. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:33:51Z), 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/SEYOK1534217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa67c405d5dee4061708445362cdab91198598bc0bfeb6a1fdb42630b7a24d00. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/SE46E2300303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3aed8b99af277b4f12fc599f307fb9a6f54a6dbc0958cb2fcdba35f54139e2. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:35:11Z), 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/SE46E2400303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a9dd1984041e9dcfeebbdcd296369d831c4c5766a90a1526cd4bfb8ea4cb98. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:47:44Z), 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/SE46E2400302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb803c32b6c0a72c376deb90e55751fa231bcacc714ac86ce5658cce0128a169a. 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/SE46E2400305.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8280a25ff59a7ae41de525b03eff2f3dde638c4f8ea1a7368d4afcc945b55ab6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SE46E2400313.