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 0xf14d32e158d3f396e85d31d8f10632f774a1ee7183439c0e70d6a6862c305e62. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e2e1d6a-f61e-4486-9a22-70e73e6638f1.json and https://artists.proofprofile.net/proofs/artist/7e2e1d6a-f61e-4486-9a22-70e73e6638f1.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 0xd0f237677555824a7b7ff86c29f88fd9ca2e550b045516cd5997c6bddc10b644. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZHNC2575798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe443e777e78aa5e265fd3977de98e34320430ce07fabc30ea2b6d70b49225ef. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZHN82514890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad392486a2cada8d1b33a5267b7121a930ebf7f0b9e2ffc54012224827b12d6. 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/QZK6L2535872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb019cf230bb2df34c6aae8c54e137ab870b48e709dba5b899c8c7dac13da73. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZK6L2536073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47fc7d00c6f8a9060b7ef60d4839e19570d00e0cced58f4feac2f18f11004e2. 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/QZNWQ2500664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d9d7dc2bda418f794adcc9a87a7dc1e00d68a0644e79d8fed1a3fe8c21062d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-20T00:26:19Z), 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/QZNWS2577153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537581472dbb1ad65c2610d6dd170fd9c918de501d6ccbdc358e64ea25f3c389. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:26:29Z), 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/QZTB22553558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51d2700ec522ba525acc6890a2141acfb2a6c09ea281ca3973cc7ddc3180d0f. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:53:41Z), 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/QZTB32599755.