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 0xa1c96786f5826a3bfb6d5fef00e3689de132bc84292df179e888526994e7246d. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a066e46-cc2c-4599-b039-abcdf4b9f0ee.json and https://artists.proofprofile.net/proofs/artist/5a066e46-cc2c-4599-b039-abcdf4b9f0ee.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 0x55d536fa05b2a817e6b82ecf00037f5b66230c6cfe381bfd959b6597150c3dc0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMEM2395662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a426a45aa70c49169fb9f2bb78cc97ee073c14e3b7be5d5ee581f65f9f330c. 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/QZHN92132295.
Tamo Unido (feat. Luez La Voz Del Reino)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f8f05bca02aa545a1f788e2f7962e121d6f69dd1b01857c276a1d3d05b2ef2. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZHN92132299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24c1ebd7bd7c2b0af9db013ae84a65a200fb3589f36156cbc1b6fab4f97770f. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZHN92132302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d476556e1648be280b389bf5a0f5fafcf0851c201cafb8ae89ce499241c28c. 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/QZES62028319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7eedc9985196ae45bce31f4f41a6231531d6d132082beb49053789b005e9975. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZES62028321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a582f3f0de21026519bff497372e2c565694023a169740f3d47e5ca809588e. 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/QZES62028322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9449679a9b7a2adf70beb3260ed8f1de481aa3a48cbe6e2af9889c27a1a469db. 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/QZES51894069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a8f6ee2dab4b6c5bdcf73a2138812e3b83adbfdc6af7eb5a5aa24eb9133416. 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/QZES51894073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61daa8ba292ca4909b7aec4a6dfd7a2c383f909338a6ac590c3bf89041ec49c7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNWW2499395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9706d2ed7371898dc879269623586a914201313a10cfb4af3b9c43ef346b50. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZK6H2494970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79775874ea30a59789b0f1316d363bf6b1d9e40958fd23e1d3eeae1246d9306b. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZES72319950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13de36d61d55869b35290b15aa2d6195e39f3f4c0f35fc72f2c27b8f0f611115. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZFZ22323829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb6be5c03244d594e7ea66f2094279b54160322b1d607598ea2b4d5c1b1dbc2. 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/QZTB32251632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0ba7ba6324e34cb384b997d5b0829f54bafc610485ae2adb2b6a34260a7687. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZPLR2221180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7cab529921707b59949cb523b24bd83f1c84ba7b5483965930b880cfc6365d. 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/QZK6P2248065.
Instrumentales Vol 1 (Instrumental Con Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f135eb97c06401fb87a5f12f12fa7da42366f214144062dfb65982d8d83241a. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZK6G2191055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc9a547374f08efe04efd614e2e445d5254066fa570229e62a70d5261813df5. 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/QZK6G2101714.