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 0x95e5d361029b3dd9395dc7f94515d4a3f518d4ffa0883da8024bcef23e0440c4. 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/315ae365-99a5-449f-b01e-a978be5ed2ab.json and https://artists.proofprofile.net/proofs/artist/315ae365-99a5-449f-b01e-a978be5ed2ab.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 0x5d99fa37435c65c1cf8fcf4ce9001eb325606fac3345127da594ea3b3cda5317. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6P2293569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf3da0e1c14975191f44da9a88ed7b823d887b6fd61bcf4ae8e00e4aa9a3254. 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/QZHN92120660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2dc752aec6f066f29bc020f1f5986bab7406d8367391dbf98ddcb31f001b9b5. 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/QZFYW2190837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e73c22affccf2c1beea2db54f81deba5940466d7390f4ce489be9b79e8489a8. 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/QZPLR2001883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99da8a0ca7ed4ba56068b6ec46879d4a0b6fcbdcb500e9a5bb5738c69b99629a. 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/QZHNA2073965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775b04c159d9d36866ba8667cbb577f0fe14bdfdaeb39c280456b71731cb33bc. 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/QZDA72041171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5a6a33c4a9f874410222321bddc99795f5df3c448868463c3e71ca0b6c4ca0. 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/QZFYZ2094828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8a052e6ab9b8828c7a70eb8b3e1579bcb2a3655f360e7251fe2884eef10eb7. 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/QZFZ22046781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e27fe76f4899c7275766f14b18073c389c2d8e75de3b4564bd98699d5f32bc. 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/QZFYX2049368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab476b5749d893b1ba4376800141bcbc2be2e4921c6c12309a3e9bc0f7050b95. 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/QZFYX2049370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1797b37b9aede584c2dc9d6c7828e8a189b67928a70bc602c5e626b89c439ce7. 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/QZK6P1986677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71cb1cd513d92f100be79c81445a99819c78075afa00b3469e1187382ac4f7d6. 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/QZFZ61905241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f9056fd6d56b7d9557735d814de1d28c1a9b3a3cf815b82f8d0f61a19aab3f. 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/QZFYY2030648.
Take Our Chances - Nando Fortunato Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a82037da19590f9616c2666d028156162542e3a12d1154a4ade036cd5f76ead. 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/QZFYY2030649.
You Make Me Feel Better - Maxi Rozh Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ccafb44e12d2c5d829e27d5ddc26578c502f510fd1be05b7dd0c3f81ea2a72. 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/QZFYW2191862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa29ddb66896c7e4e0bae22d1042118fa428f28bd8b39ab77d6565dc097f53e. 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/QZDA42171698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abb88757e25047870777910e9290b913ffbd73a832658a5ee8757e969bab91e. 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/QZFZ32009814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8de147c7279cdeb46e5d3fcd13871466416467eeb3f593d59fb8351e86672f9. 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/QZFZ32009815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa450a55fd56732c6ef2208b05f9a3c7d3dda9c9357cff8dc7ae66a18e0177d38. 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/QZFYY2031215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44481f5bdee9eb5d890aa4e79d17c2e0b24cad82b07740811857081b78d6b4c2. 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/QZFYZ2184449.