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 0xe25713b5b2f5ecf8bae76f5fdc153dad5be76ce052774b7caf9247d7e80346a7. 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/4d89b026-e090-455a-addd-0a3899deb595.json and https://artists.proofprofile.net/proofs/artist/4d89b026-e090-455a-addd-0a3899deb595.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 0x9f801b01b7b0edb332613258181980f3895aa241d0eff01d4722251bffea92e1. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/KRA491500124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b82c99ab52cb4a2421543c3fddfbdae1ab4792deec00019d8d4af85121c8c71. 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/KRA491500125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312f895d2bb6ffd8bc78ea90d5b5fe75cbc9df208ebd1acd995c938947a2ed9b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/KRA491500126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043201ed7ece2574a2cd4929a0b598c8f20456d2ef77d65a97c1e2fa71171590. 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/KRC491600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fbe72f8223199fbf857f047158621e9804f2c4b51d6dcef12a36d8ef8b83ef. 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/KRC491600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a049cd0d07a39a0a53b3aeffd78ca62fb25add6b41dfd358c52adcd56169ed0. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:26:37Z), 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/KRC491600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68237ba27aae24d00ae7ab69386df5e055bc3af825c539871fa0c02ea1757c2e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/KRB461900159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114bc134556f3192cf956070617de01043103a740134e72a0f7f20bf9769f874. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/KRB461900161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b3f2ecee4ccf87cf91fb4c3de70757425c9a2fcd9b032271b8557f5ddc015a. 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/KRB461900162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f1a4089b3028d25c19dd521b05c11b5f76f3dabc3bef274e0a067fcb2ebde0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/KRB461900163.