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 0xf6ccfbbcd43f3211e9522ff49f26d44fa81ce3cd050a3bfdd40ec1a6b4fefd97. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/61cb9b20-9673-4edc-8b43-adfd11e59772.json and https://artists.proofprofile.net/proofs/artist/61cb9b20-9673-4edc-8b43-adfd11e59772.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 0x31cefeb56377f60d9060fdab6120543da70b2c86d38652f14883a7c63fdbf534. 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/QZDA62273410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb7fd8e4430bcf0a3d1ec69f8e9589a1af1bdb7cc3efcff26ac8b33b45e8a44. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTAU2220668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ee6d195e0a3b18e25b8e64d125733fe7e9dcf9611311ffdde5ef1c629549d2. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZTB22209731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75fe54acca0086635105a47c9048c72c1f2aeee40161c6d185d5bc62fcf6ba3. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:09:25Z), 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/QZK6P2377049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd09a3f01c7c71c8778da8bbcf0411142c6faaa0dae13b774bced3d1765eaa3. 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/QZTAZ2582577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b8867462fdb1ae3bfa9a848f9132556a54da863c21cb2f781a378cfa436a30. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZTAZ2582578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29478a69541a73ccad51ca454124b3c5b330156d6a15d6ee84717f3181e92536. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:56:23Z), 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/QZTAZ2582579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3714d19b475c216b59599f491a95e2ee774b933188ecfb3f16312dada924e30e. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZMEM2505335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bf6b3bd1e6196f88cedc1a5bddc49af5a95b6c86539fc1e07ae646a26c1704. 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/QZTAZ2582580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b93972cb6003f87b87769f40b4ee7767273eb14a0360ced17fee802901ab9d0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTAZ2582581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd028e8d4a6a878522f82e07dcdef5d2fe22c5edea080832e1349d4803eec8bb3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTAZ2582583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad55fdd056d7b2b54a7fb24c7ee5081cfc30323ab0d27fe7f67e48860a055a8. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZPLR2175978.