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 0x16e21c2e8c1a235f7be2b5ddce8eaab3b0b51eb8a1ae84910ec77e56ac27508a. 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/176f9ffc-5b97-4706-b120-3c6c22e1042f.json and https://artists.proofprofile.net/proofs/artist/176f9ffc-5b97-4706-b120-3c6c22e1042f.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 0x7313497f2bbd9f292448a5068ce9c1183817edd92e852d200460804da969a2c9. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QZMER2105291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b5a26ce823ece2230d49bc06a1e8baa7c8fbcd27241f1a6a18354fc83877cf. 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/QZMER2105292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ac8abebb987f210a1df6ef936cb191ff8b866518edbb6ec63d49f25898a125. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZMER2105294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697890e279d6ef8acaf3255312862664649ca9c4f37b3a92c5f187dcc560dd5a. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZTB62434057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7cf3db0154975069b6ed742df91ccff26f5d1ead24d4a1db47eb26a5e39faa8. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:23:36Z), 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/QZWFF2400694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7cf3db0154975069b6ed742df91ccff26f5d1ead24d4a1db47eb26a5e39faa8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFF2400694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697890e279d6ef8acaf3255312862664649ca9c4f37b3a92c5f187dcc560dd5a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB62434057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658f224a2722a7ef175f42534c8344b437091aafb0ad05ca06251f51e3c65522. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:12:10Z), 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/QZMEN2524824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78f15cb7f62bdd42a520a43291fc28c8cad10c01c882be9a9b38af1474f3f08. 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/QZMEN2524825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f44058148d8ac790d1fa59c41be754f9814027e439c49a5295084f9bec94a5c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMEN2524826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263441d8f8a3c67744f81fdcd4a3936c0e0670df76a775442e6e4fbccf15e48b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFYZ2312961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba32c3e19a2d4672cc64ac3a35f41164625260038e5531e95146ffb0c7b13b91. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTAS2295920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538a851981027db792e6d943629432ea03bfbbd99fecfb949c2797d803a6abd5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DKD3Z2108668.