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 0xc59d49f03c2f45334b797f6a49ec8c3c4487808525c45f02e4bf5809722fb470. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e5aee075-b533-4403-9ecb-145c4132ea3e.json and https://artists.proofprofile.net/proofs/artist/e5aee075-b533-4403-9ecb-145c4132ea3e.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 0x65263041d371d35f02115f10b98cdb21a409d212af8d1448b286c9a7fd35f4b4. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZHNC2561336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83255e0ce2efbc584e7ba10ddfbdca18366e27f6ac90e147696516d334e802c. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:08:43Z), 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/QZHNC2561337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb345fcc4609ee585876b9b7ccfccba64f9b4b397911d13303b1062c71da61789. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHNC2561338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c51d1ed9340c985889e990450fb0408643aa519b2cb840680a3680d29f6ab02. 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/QZHNC2561339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7913c9444b4a845ce263a436be1b890891c55d39d58e10030b95d40b1593b74f. 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/QZHNC2561340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903f3a57da019698bdff6dd1cf843e48f3e2161a83634bda4580a8f698125e16. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZHNC2561341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa097646ad2f5a8ea616383a4a90a9975b6be8db74766c56306d298a335158019. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZHNC2561342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0781bd142dcbd91a2432514e2f87ce6184b8dd9677fdd63ac6d787448d2e9d04. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:04:25Z), 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/QZHNC2561343.