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 0x8d06da939a5519755761425c3ab608e93c5f398f189835d4862bc99b51524647. 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/e84daf5e-b8e7-44d0-9508-91d796c9ef92.json and https://artists.proofprofile.net/proofs/artist/e84daf5e-b8e7-44d0-9508-91d796c9ef92.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 0xaa35f1b7c164a688d8a7c9fbceedb78a9c16fd209cc352c8fa59047123eb958e. Chain 2 (Bitcoin): anchored in block 957661 (2026-07-12T05:37:10Z), 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/FR10S1874849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3d36e3edf2acd28288ea0181f2935b6fbf21c86a29f7b0a32c7cf9e9d5321c. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:51:50Z), 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/MAA172000512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a27be23b46119f2e8047703278edceb0d135631b3d9288139bf546cb2e9107. 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/MAA172000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2926140088e18db0e55b61c1973c4f8e6f1b556c3fff1f895ebc0a2d9eea0a58. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:06:51Z), 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/FR59R1742444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3fbe83184b9e9df06be6b2834d80846b52a97aff601ed345c66d4aa0aba378. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FRX201606093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17c16b7d96d8768aa0536089eb5c7a277e7d1bb429d61ffa788004ad0d0dad8. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/MAA172300317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2fa8fdc615d4a99f1b8e389755f5fa1299985d886ae77824672ecfedd0f46b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:26:40Z), 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/MAA172400587.