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 0xbab44a28a7d10b1f17bd0048f56147cb6f851e5105fd5d1b09e07f4212751b9e. 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/7c2fdc0f-c213-428c-adca-ca902c6dfef6.json and https://artists.proofprofile.net/proofs/artist/7c2fdc0f-c213-428c-adca-ca902c6dfef6.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 0xbed3106820860cb359732338ae8101db9f772dcf86cdeb78c527a000ebe6de76. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:24:36Z), 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/ZACW92200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5793d183da9b2b7bac846e9d1cf777171dd9710aeaeafa521f73a8b4f7eda9f. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:07:21Z), 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/US3DF2281671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bf2ec1338197d10dd21f452836d9a5521e70115415b7168481000afe515618. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:00:49Z), 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/QZTB82209924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70421aa74ee7f55c3ca7404646a6dbd601338d1700bcf52e9c40c67bca5e53c. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:03:19Z), 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/SE6SA2410926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f016260a574fc3019bbb8109e8a62790cd3e4ce6b0679374b94e666ded70e29. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/US3DF2503238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9774751d4e008714a096aa8c9c2dfc0e7d8d892e10c1e9f7178b552251adecc9. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT4K52584608.