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 0x0c98ee5ffda806f61a7d3eada6d3376d31982c6360b60726b354250c7b5fd7b3. 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/9c3e427e-3dbd-4df1-b21c-d0f97f5831be.json and https://artists.proofprofile.net/proofs/artist/9c3e427e-3dbd-4df1-b21c-d0f97f5831be.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 0x8594b15344a92ba1780d30df25b7c08b2736036066dd2b7623e134d3108adaa4. 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/QZNWQ2223324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa240f43cc3133e9df82c62585a1293d8b500dadf206d27f24a9978bcf9c37e56. 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/QZNWQ2223325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d409251b04070ab41199f6b6108895ba0d18bb8d1d5fb9ce83d0a976842e4ab. 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/QZNWQ2223326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedef777d4c59cb29e73c0776a5590cdbe2d3834eede37fae08db30fa23caa0fb. 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/QZNWQ2223327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36c5d8f2fd5cd90721ee6e24a1ea285121d6b7f23747ad94b6bfee4f2b4a2b5. 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/QZNWQ2223328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b195d6872eb325c4d90ab3a8700bf1e5f553fc51790503e00cda45fd5259e3c. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZNWQ2223329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb31455bfc9f3cd2054dea9d6f9c3b76bdeb6cc02fa5e24c7d90f38f390046c. 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/QZNWQ2223330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc15d93c91653c7089ad11e78ad1d88228ec5ace514ca3e930d82d1541e36d09. 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/QZNWQ2223331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bb6a519db78327a47e9583c495204c51ee8bcc8877bd1dfed5c0bfc5b8b401. 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/QZDA62225160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45f222f2c53f134987784b3dc80f7db434d6be9ef0da2317671616836b1be30. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/QZNWQ2223332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476f5b52e31863da489e33bb896e3e6c1993533889a58602e6b5d9aff79827a7. 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/QZTBE2453808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc18937b390d309d672601c0d861a7cffa1f98fd221d84c4965f5f543a4dc036. 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/QZMEM2438367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9154387eaf3de34536bfff2b1581bcd8432051c96b6f92e94e8d59598028c229. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZDA72438083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f13669d31617e458d098f3164640275b9fb70b440128bd0f64b999d7204d41. 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/QZFZ72480134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abed52ce9c997b8c80186ccb6c2fdb5e93d38f14d24fa8e63d26a452b31b0f2. 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/QZFZ62400192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0851f4015cac2ee3835b27dac373aeaee406593db87e4a350e8536628ca1fb. 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/QZFZ42415351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00da95f6fc5e9dcbe306a1cd3f2d1c87fe84168994b7babb017047db65c5dc6. 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/QZFYZ2485280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f14cc12e6358b3604b21d57c3c13917940c3522e6d197335c748deb87270e78. 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/QZWFQ2393562.
Who You Playin With (DoowopOfficial Diss)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062280f4674f528ffc3eac63c72192a574220301a150bbfc7232259fa8e59d77. 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/QZWFN2360958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa36d0614361be8196f1590e3bf7e78af1c16ff33f947d8b48beae9fbede3121. 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/QZTAX2312405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860bd2c9075aa42cfec178f9a45486105320731d1dc80ea0d8e0e60078f1f9d4. 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/QZHN42322225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228ceba6089f6ad64caa2fbb3f751d4f2ac8fce3b1de31ce215345caa2b5b679. 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/QZHN32302538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e346fd755408e41018df9d74bfd8e656bc33b514a74c82c125ce1d11db73014. 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/QZTB72276284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d0cd93b3cbb66de90bff9973863c03aaeb1d2f1837bc9811bda3eb43a05503. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZTAY2232910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9697211e620ca8355d6cf10d32d65042ff9468f87cef6c4bca6622ff2b64c8. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZDA62225159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3919d0e6974126e99828a8284ca26090311edad5a64fabb3431914efe5109062. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZTAS2283446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c93fb658da7f10c358cc041c3f6b759e6908ea1d2c6fada72534879de6594b9. 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/QZDA62225161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9697211e620ca8355d6cf10d32d65042ff9468f87cef6c4bca6622ff2b64c8. 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/QZDA62225159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f4f24d63bbeb67330136713dc0f345eb0086c476134d903a7879aacd235d6e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZRP52229871.