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 0xfbd655974b7938fd2aa735a5b2a99ba62bb9431b5e0efbd26e68f971222ddd63. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a466236-cc63-4eed-b5bb-80cf5855a0ed.json and https://artists.proofprofile.net/proofs/artist/9a466236-cc63-4eed-b5bb-80cf5855a0ed.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 0xd5752782340eda0546d686149abeaa250ea1fc798a49b5f0fbc1d1fe51ba3e7b. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QT3F52504814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab1854196757f5e36157ab2972e17833a14bbc28a961feca572547088bff727. 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/QT3F52504809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9a4f81d92b9b824a25141ee0be10d107609446c812f400cf2b86cdaf689c0b. 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/QT3F52504813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3d4541c9eb6d73add01e8da720f6e4922918db4124ec8c7156c88cac4c9589. 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/QT3F62516908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363bc0a417974ade424c17d214a8bf6d1fa15ae7726162ea8042fe259ad8f6a9. 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/QT3F62516905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdaf9bac6a4bd53eff8dc3069fc2a381266c1bb7038788803a58d14ecb617ed. 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/QT3F62520017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a884e05bc3a16406dd1ac5c02879dfe844b882b387ee24eee5889f8cd35da3. 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/QT3F62516909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932ee1277f96d7c2fc44610f83318046efbbfa9c83f028578351e62633b3abb7. 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/QT3F62516903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f24e4d7a18a5a44e19dbc3a67629aedff39d270776424284495ea736d5c45c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:58:03Z), 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/QT3F62516904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35373a0eac131f36dcec4b502f0d36347bc5b22f0b0a0de760b7cd8c7e61fcf. 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/QT3F62512336.