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 0xd21d2ffd355aa8f3b8096b0bd6dd66fcfa14a18938ecf10323eee12e924e9c0a. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/516cbd13-173e-4cd5-97b3-2c4ffdc2ff47.json and https://artists.proofprofile.net/proofs/artist/516cbd13-173e-4cd5-97b3-2c4ffdc2ff47.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Clair de lune, Suite Bergamasque, L. 75 III, Debussy
Clair de lune, Suite Bergamasque, L. 75 III, Debussy (bonus track)
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 0xc16144dfb9fcf99eb924dcdce1ffebbed0cc8d92b52286b2b4c5a498ae54c64d. 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/QZNWR2491075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed88fe70825f2ed065c6ed6221bf605e988985e386fad11af7359d94cb9e9f12. 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/QZHN92571479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862a5a47fdadd98c40abc82642a5b3084a28fab88b05bce55ef840fb6da052f3. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZHN92571480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfa187d8752f3b123582f44ba4461644df1943aa3cfbaf9aa727a955a37ffcf. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ7N2498552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc735a6f9d7ac6a2c20f8fe38be5675e605a3808796f6875f86c9279013582ad8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHN92571481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccb08e4e2df90852bb7774914955b9f854c69a3aba9d1b0cf430e9f8db0c472. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZHN92571482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fbc51025f7901c5cbba91edd2fa9a1d2fca628e9e0b61f30b1db8276556dcc. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFH2437737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee86a7c2f1add9f37cacf660629c0193a906e30f5a4a78769245339655394b15. 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/QZWFX2487351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16144dfb9fcf99eb924dcdce1ffebbed0cc8d92b52286b2b4c5a498ae54c64d. 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/QZNWR2491075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3209151f4039958db1f2955a144f90c0046451fb074c0356a3ab9a1a8d6645c. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:05:51Z), 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/QZTB92578411.