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 0xbf766714494abbf4a14b9533168e3f205490f7d9311883b1c4c71c7a57f80e93. 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/09341ab8-1b41-429b-b17a-98faeb96eea1.json and https://artists.proofprofile.net/proofs/artist/09341ab8-1b41-429b-b17a-98faeb96eea1.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 0xe6936070a799482111ea0ac2475665e52661473920b429ac6b38956fb8508423. 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/QZMER2390029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3712f77c7b944011b4a079ee90f65f1e8ef95efb8af938554dcb3957ddca5a6. 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/QZHNC2328591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082688d0d657bff262b40659e7fc09e88b3cbd0f4e787e6b7871ff95a9641c25. 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/QZTAS2110484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10b51ac4b751e3b5a253f9a85d8af115bb934f30693802d9e9a4a56dd44cce7. 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/QZFYW2093900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7dc3994ba1cb9d514dea955bbbeae5a792571751b552615af296003e4d0004. 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/QZFYW2093901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e3c0db87f66b4567e10cc3fbb075f02cc6b1db36fda7be76c62a322b996614. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFYW2093902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cf67826037f0da77587e8cd58b59b21b8f2bb06373eb2400926d477351253d. 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/QZFYW2093903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff0818bf263035295810e959942d9af04a8b3d287f470ec6d1be738a277940d. 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/QZFYW2093904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f813783240c226dcc8cd40087f025f8c1780e7468a5a45a1a3fea011fee65f. 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/QZFYW2093905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbd20ee780b4c131e1e63337c835ac6abbb8002bd7a92333c6d8a9bb6b8de8c. 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/QZHNC2219338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd917898287a0b85784720faf0ce0884f921ee3ca854429c334f549b71c7ada. 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/QZHNC2219339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e87f94f1f3b7809e471b6e1503ccf875cdcce8789094cc9310da539efc0645. 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/QZHNC2219341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4f82155bfa7f6c1ad442e14dc5569ff6fc4845bd4b6637da51ea1e9e547f3e. 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/QZHNC2219342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d60dcd1c2eb17dce0798397a3aa54de1a7c03944f24846b442a41d07eb0ec5. 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/QZHNC2219343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7253ec91741e8b9dc900397179cffd826aff3ff4e4e22abe3593ceaeca6eb830. 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/QZHNC2219344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc066a5313c9291452cc3e3a90121ab02bc203e052b07fb73d3b9936401a0f80b. 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/QZHNC2219346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbbec6d1b7ea913d394c93703d4d7a718a09d516889df8cc44b6aeb48cd4c1c. 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/QZHNC2219347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3cbf3c58a476486cfebe9485e23fca380a89d1f4a2d49b502afd52b973c506. 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/QZPLR2341251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe84eb03ab4cf01b0a69f914ee4b8d03bdb0674c66f7aaa04c5d0fa03cbd31a. 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/QZPLR2341252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ba4e619639ccd668e526ad231e5074910ef0f0a9af614475b60d9dd7a8f404. 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/QZPLR2341253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a77eaca4be32f7de80b0fb53537d5b00785e951cd38c00abb0deee346f7ecff. 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/QZPLR2341254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49481c90e27806437a3be5f7c37adc83fb490837a60bf2eafe41a8358c8b2e5f. 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/QZPLR2341255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5b1a0eecb6fae80d8d35e8060a8b49b201af80f5cbe9e67671d3a39242b935. 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/QZPLR2341256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa874fd094289d5e60748b20b3d31a4fd58dfa913375ba52c9dcd9a8f1b3a9f. 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/QZPLR2341258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa237dcd51db6613977d99ae5b8e5445a1b19e27eb18d8b692516027113d7fe9. 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/QZPLR2341259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052169b828571f1085833263f2a496bde1b156f72936f39156d5987f6e53fae1. 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/QZPLR2341260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90c70c50f1b9b768125e19916b4f121c089f7e5b002610429806d64b0a6aad4. 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/QZDA62018468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e209129cc9c9a9ced24629fd46940054759121ae63d4a4914408fe7ef38463. 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/QZDA62018469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bfa0906bc09ad94c62e8bd29787a05b62b8e5283a4fa342b4f18b2514c877b. 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/QZDA72077932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf891ad0789b86c6fbf86af32af2635698547fbdc1e0cd3baf5adc01d581f611d. 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/QZDA72077933.