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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d17ccaf6d0f36a82c0347bfe77ead85ad266823fa2a9e30e00dbd6774eb2ab3. 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/fb867829-df1f-4f3b-8850-f9458f9ded7c.json and https://artists.proofprofile.net/proofs/artist/fb867829-df1f-4f3b-8850-f9458f9ded7c.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7c49ea3f4ada43f6178ed23a38c69972936efd2bf75b8f51d6b55402b9eec6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6F2226553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fcc72296c07b48d60ad7f31a4c102c9c8c2c4ccb13941bfeff5538e9b41d03. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWT2263386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a05faa3b2e60d200e693ac2d62fbd08fe222fdc6aa4df09a28812f7c4e536f6. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:53:23Z), 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/QZNWT2263387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7c49ea3f4ada43f6178ed23a38c69972936efd2bf75b8f51d6b55402b9eec6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZK6F2226553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8548b43063ee5099fc63a3622627644069b0d25fc40d09726868aad883ca154. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWW2174739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af7ffed26a6f1af39831db3ffced4deabf83423741e8840beb551457039f5a4. 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/QZFZ42032888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9910bb3c13671fdf381cc6db3fa617e2fe1ab0b51ebc166c18ea4c7f56102591. 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/QZFZ42032891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfbacd077db4aa7facc3cac2b5ba0d684371ad333c43ed0ca9d46dd2d5ae298. 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/QZFZ42032899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a2fd063fa9954b09c394e2862ea8e72ab4068375d32e6fd9c5861925ec676b. 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/QZHN71936862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fb565ead8e841b5c30defa023b4f7c2555bd042f4a45ec6f2418e13d7a36c0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHN71936864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d7af99043029dfe31031996d7656f8e23d73b4f960bb71e7ee1b3809f15714. 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/QZHN71936865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2984cfc5ac2031f047f980063d2199ea61ed0ffd6e7704ffbce0163567cefa7f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHN71936869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b38d356f204d85fb10dc1ab3a8ae3c8b6428f4e99e654eddbb1114a6278de45. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCAHS2395300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5532e582804ea4ab0c77ef2a661546344e460120a24e53178c1e3e431bcd3b45. 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/TCAHS2395316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604ea70086561cbbc6eac69c089149543e63e3a1a583cd7299ac6aeb66b569f3. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:19:43Z), 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/QZTBB2307748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5be8182db4063defc60154583d34374e91b638d2f80a61d14187e86c8de000. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZNWT2303075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db554c4e50174bd75fae39afd16944736c5822d8639b87a3597ff176826dde7. 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/QZTB42230265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffa27ca7d0cd49fe7ee379f7a5ff43b1b4ffbc65ff16d5077a283c5f7180c21. 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/QZMEN2024822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07145373d2091c8083f2bb7cac1244ba359dd7e662c109e1987a471a191b2268. 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/QZMEN2024823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673e93ca1b70ca890147b19897febe01b57b4863e3302ea9ec179111a5bb1b82. 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/QZMEN2024827.