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 0x6836e331f6c758a98b70272a70ccff39f82ec6c41db2d5115279d1e43b326b98. 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/366e62e1-521d-4ca3-bce3-18b53be5c1e7.json and https://artists.proofprofile.net/proofs/artist/366e62e1-521d-4ca3-bce3-18b53be5c1e7.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 0xa6720bdfd80ebe43e49b70f60608060633eed46cde57aeeb927dbe359b0cafd5. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZES71817270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfd8344fb902281db0657b3e50bda601d05127ad57d6b4b031a8fbd71877827. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:35:17Z), 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/QZES71817271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b9c6128e2fa22fb3c6b312a38d1a04af14848024874acd8760d5663b6ca7a8. 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/QZFYZ1911042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287182b1f78fa4c8e45476177604a32b1e029310e1717bd9ab0aa45a8de8a650. 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/QZHN32015774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb932cf5e90a16a2c5596e61efc1b957e6b6af62586486e9daf03dc3272a7ded0. 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/QZHN32015775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3c4e8986e8e916341a853e6734b5a62a7862888e446c881b0ea51c2f9af619. 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/QZHN32015776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4adc7ffdd835c34d56966a743590754a27430eb389cb89b69ef7fae534c76e90. 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/QZHN32015778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61877b46532c0dceb89d6517ce09909ce4803e9f32678c5860aca581d1576d5e. 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/QZNWW2100308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30365df68b650320924aa0f1bcdab57a1e8368fc6c8bc586a1d93a270ddaaa6f. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZNWW2100309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e0df0e7193f5dea299d7ed8c30799ed86328040096b880f35036c7798577dd. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZNWW2100310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21dd23ca6d7e316832e624e7dfa7be56a8c5b8384b6ae0d58029b4f4cf7ba68d. 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/QZNWW2100313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e18044cb1b248f3c6447bb7315d496dcc989099c5289fa6a92a922a823a7910. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZNWW2100315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d13f43e012e092c5e9ea034fe19ec0ba42237d6df3c696263869399063636d6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6F2102177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359d23973ad574380d319c5afed507ea9e23921849f713c26f495135edc8681e. 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/QZK6F2102178.
They Told Us There’s 2 Types of Mexicans
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ac6d8e6457053acc5c9805f9668ec98a34f43f6582b1dfdbae2ac0c4f95688. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:11:22Z), 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/QMB622422501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d7b054c24d214f9e1bc97585d799ea53d388691c57bfd5740931a838ea74a2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:21:41Z), 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/QM24S2505261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9164c6cc51b6f3d040bad69bb9454ce073cca510dfa5649eec7ab6995418c5ed. 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/QZK6P2026752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b56965d6d648c2d246048e59609cf2b3f508d8529721558b3384b4d6add7036. 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/QZWFX2428642.