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 0x24ff215a97cb1f3ff1d00e03ff8c2553784b8e1a7ad123a802b44f42f35287e1. 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/0d43fa66-02c9-4945-af44-59f64d6d595b.json and https://artists.proofprofile.net/proofs/artist/0d43fa66-02c9-4945-af44-59f64d6d595b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bilouki (Freestyle Rozo x Adrien.M Episode 10)
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 0x575ab342e73b958b161f29bd1b7087a7d229659f72eff6932145210963f19102. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZZ7P2458887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ee604e10658c55db7afd6d92f1ab9a50b06dae442367db489b990adb6bdba3. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZWFT2462570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c64f8f1dfa0380cf9140a9036fed6202eeaeca20df0e026c21033be99301eec. 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/QZZ762426017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f96b96843b9e861a4df5a2fae0a53fab29d020014215ff072f749d579f178b0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZZ7P2457446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c30527b79f03fea2f20a628e5242609cf462ef9f6528534e641e57f7e56285d. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:04:03Z), 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/QZHN92576497.
Chakal x Bresilien (Freestyle ROZO S3 EP.5)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde909f69153f293f2b8be3f3cfeefc50143927d2942b1abb47c171b09cc7741. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QT3F62550120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f08eb537e0622c033250529e7edb1fd8532e30dce5d9629363e2cd4eb54efd. 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/QT3FF2531345.