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 0xe24431469c3d959a5786b911fef8a4fcc98ee63f2e8ec73406d3a063e8c04cbb. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d3857324-58c5-4d5b-86df-5ebfed766099.json and https://artists.proofprofile.net/proofs/artist/d3857324-58c5-4d5b-86df-5ebfed766099.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 0x339292d1c0e7e584a2ccd4b9d79c6a460be4d06909fed31920c299f51ef35c50. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T07:58:15Z), 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/BEGL51900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d0582a1f5b6e7fd7b50ba41361ec4220c2ef58b3bc94b202d54d1a3ef4548d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAFU2189423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94d87e3f641dd1fb9b280ae1a21d70afb3831a558c1fb3488bda9b59049ad3f. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/FR9DT2201160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2904a936de49e6371fa8d75de6332fcc6d5a62e0bd8e0f03696dceba4e115954. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/FR9DT2300150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54773fb6a2284ac33e4d2f33a3b142481fb7ce5a1483596c5d855988ccc6cc66. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:59:15Z), 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/FR9DT2300350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8971adf4997c6e5d5541968cfb4dcf1a2f1ec7607e26f7995f8799e9f85aa7. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/FR9DT2300360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5ccb6bc08f6294539cd3d1316446e51a583dc8ec529be195d56a41b5325e25. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR9DT2300730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba435c57703f71ed0f23a2a3555ef661371cf3a92cc7bb0a3e946113d30491a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR9DT2400460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698d281506ba9bec1b8b811add7f78089656ca411987de108292fbe891ce4b35. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR9DT2400420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba435c57703f71ed0f23a2a3555ef661371cf3a92cc7bb0a3e946113d30491a. 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/FR9DT2400460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb99b4105e11512d01d64ecf6263b9f441da7efd88de3561e1c7dc4f3b7aa535. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR9DT2300830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb99b4105e11512d01d64ecf6263b9f441da7efd88de3561e1c7dc4f3b7aa535. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR9DT2300830.