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 0x65b93d1e389d7d3dc53e338c127a28a3378bcded5f0452c9f8ac2383dbe010cd. 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/e79f664f-782a-4a7e-a2c0-7ac8404e978b.json and https://artists.proofprofile.net/proofs/artist/e79f664f-782a-4a7e-a2c0-7ac8404e978b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xe9817a1130d5ba19c77c0165255e16db5b191758733d9c17e5b212976daa08d0. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZPLR2321751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d224859e0c81ba78c127e07a152c4986278753d05b717fffc4c7e04b579936. 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/QZNWZ2387838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be698a5578f1f64929c7b29c9358f9149133795d1c3ba6365a3faf4801649cd. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZNWZ2387845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b40ec1c1215c7dc689988ce52ad3bd221d6cf73918fc03d5cdd672f1a32a72. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:47:41Z), 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/QZNWZ2387846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9141b46e0480360203f7f4bb0f856aa5a3ec8b249cc526717d8208eb8e9e44a. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:34:28Z), 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/QZNWZ2387849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5137a06822fce85650fdcd66271437f766a453c0006b4f3dfc4d8affa00422f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWZ2387850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15592688bd9afd628a44bac0f1fe69c1d7d3bb1b8f270b3a6b19b5b94755523c. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:31:23Z), 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/QZNWZ2387851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a2a26b518d57d35862def4ea7b4ebbfedbf99777445af3d724fd55df08f7db. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNWZ2387853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216c08cb0b87c4af7b3abecbead099c9323f513b43e451896faf738d2621995e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWZ2387854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450bad484657be2404aef0d30fc8e70605d8ac722b9e6d5611cde4b6ed0fcac1. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZNWZ2387855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd134f7f3685cd41d9d4bfe4f2f28df232cec1f81be6bd8f9019d26a7b38a4c0. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:07:25Z), 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/QZNWZ2387856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a7afa00818107fad95d64766e171d0103a3df62a21701dc344271455df8315. 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/QZNWZ2387859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc27f64e6addaded6db4c0164c88f9a0b62802f3a479498d411438126eafc3dd. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/QZNWZ2387860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad555f080dabc24b201aff2c3166cd2b1d8bb2551075595654d6637a6fca45c. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:34:49Z), 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/QZNWZ2387861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a20dc423b7fd304dd2464ecd47c059b2aa88ff3ed293c501465e5cc7de0adb7. 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/QZPLR2321755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f81ebc454524c3512e09cbbcb3a6a794d49ba2e122339314d8e70d642aa1ae9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZPLR2321757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea50284079163c0b8e1a8fe0fde59c14b5a7ab4c1a0d27b162331f4bd7cd08c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZPLR2321759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c92d7f3f1d9bb4f8450a29190b3d130f1ad1a7a4c9ca10209ba5097956a3f2. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZWFH2326036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff93a83de53ce63d3937d7a630659a0fec43cd2b70687adce06a3b03232230e. 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/QZZ7K2575875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a2a5a7dbf5ee23d5c237f054591cde9225913db64390a146d2b47362dce318. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:45:19Z), 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/QZZ7K2575876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb802d19358cfc69ccc86d08f964c2f8e19f873c1a9ff374182e2cf8258d58580. 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/QZZ7K2575877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6f448e30da33d4d89209f7c199ff3fb69d6f55a1874b405f0bef1a39494832. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ7K2575878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539e687d4637041ecf8738233f69a4562a30d057e4c9da78fed6b072289a4d1e. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:41:46Z), 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/QZZ7K2575879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14d936708cf3acea00791d17b1f2fa8d6972e828bb3cd5fbc0a255fbc9602b2. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZZ7K2575880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7cbec9c2cdfcac6ba3a66e9afb2461adb665a0d6fef516d8ef2cc0be90204c5. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZZ7K2575881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec46d30ec2019acd10f45873e60fb27564cfb4da8573640322f3efc3031167b. 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/QZZ7K2575882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f7a06eb865178cf21a68922c59d3cb77749c08e0ee73f427cbf6ed8cec092d. 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/QZZ7K2575883.