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 0xc4b11fa2b438fdf06f21c62a51993e0631b0b7e1beebe1d047dd1a66efec31d9. 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/f15738df-6d7c-4c99-abec-d5a57c04bee5.json and https://artists.proofprofile.net/proofs/artist/f15738df-6d7c-4c99-abec-d5a57c04bee5.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 0x5be7235c8ef8c690e4ab7d47127d311053afdb292e954f4bcb097b6688e9c34c. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZTBA2382851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9777d9426e61991d0ec233ad5bc282f8d70ee6944771a5ee2db3af18038e5e7f. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:26:51Z), 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/QZWFM2331928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9242dcf5e09d0ac9f3c76953cfea4c2eed440b2b1ec62a449fda6a27688afcd3. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZNWX2428644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4026d7d6d4ea4215672eb5f615dabbf8e72bf229d428c994de04b8b59d186afa. 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/QZWFM2471425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe496d0c4253d0e3a69fc7f936fb853273dbb643bb16be33f4c417b3d5083f952. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:42:33Z), 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/QZDA82595964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76fff6528a28e4424575aff99622af547fbe0e768ef1745563f3e57fa775a924. 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/QM6P42583640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9acad20265bf7472a38704d65a69fddbdf71a13052f71fe50d03a1fec20d13ca. 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/QMDA62529620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2acb76c71d29e3df6008e3c981f06865c7dd868a005964c31772d4a4c5761e4. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:35:24Z), 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/QMFME2536791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6009615d5183d38ff608f7b2652b04c80e53b90fa9be506813756ddcda069d. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QMFMF2504571.