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 0x6efa9070f630239dffb72a6ea0bc5c2cb30cfd89bd3059d06aec6fb3647aa07b. 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/7be757c6-5c92-46b1-a5eb-6a09456f9101.json and https://artists.proofprofile.net/proofs/artist/7be757c6-5c92-46b1-a5eb-6a09456f9101.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 0x69c98ed94af126ec1201c4b125911d2d1a01fb900f109a6d01728d7457c98832. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USCGH1762383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c98ed94af126ec1201c4b125911d2d1a01fb900f109a6d01728d7457c98832. 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/USCGH1762383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5877159667acdeb0dee682fe0bd9c34ba659705e6b8deca860e874ec353a6d. 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/USDY41760098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b7c780961f6a0f654bee4c05434327c4227dd398b68872b8bcb70f299d6a17. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/UGCGH1760498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510d8e33f8a3ddcf7d5cf07c89c98e4662c4138e987698a522a51bcfb66cf9a5. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/USHM21759190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914b01d649abbdbe3a1f589c41ea1b60014d9aac22280d3869afd1b6325dcf4a. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USHM91741382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca383b3814a6368e2c52e864e644c61cf9ac96b107de5ff361a5fae3642ba533. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USHM91741383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57bbb71cddce78dc479506759ba20d456f3683f6a30073ed61c2de14cff44b1. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/USCGH1886545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4334d213d34825fb60b0499f1ee7a1ed9c5bf3888f4bf39cbea715b3603805d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/TCAEJ1977620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe900950481fbe7260b5f483ef2b3d7fd6911141dbac845fecf3e83b65764238d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNMZ2143103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8d097d228168a592e845516fc8b4a2d0d89731aecaa473f24730a49a06ea97. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USCGH2326059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61f9c6191d7cf538c6fe028b804e0894fb414cb80d1e112eb434348223c1626. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QMCHU2401007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d93392a302ff437105c8e166d547ac2b5e4b87b94bff914c9c9f0fd0ad729e. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZMEV2546935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d69c8f22d5ef48fdf634f4a7db95b49e28d5b369c4eae508c58fcc2ab24d37. 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/USDY41841940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b01d3d161babb5137a958271bf84586033cdef2d520c73a4f296a386500eac4. 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/TCAEZ2070128.