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 0x1e66f1ff7ccf7197bc58aef70163d88a941f41b4e7007c7c613679101246d787. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8ec0f0d-3e04-4b4a-8c41-80c37e160d7e.json and https://artists.proofprofile.net/proofs/artist/c8ec0f0d-3e04-4b4a-8c41-80c37e160d7e.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 0xe9da33d1ac5320437bc8a4a6f67fff58affe1eba608f66a10331723510dcbcb4. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/GBKQU2198782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09269d1fb020345cf2ac734f1cd2b2fab2f6d5938175af5198c389d41b928daa. 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/ITV262100176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e82f76626dd0c6289ebf679cdb4855e2cebfdff864b1323a0badefc4318ded3. 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/DEH742048968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf32ad8f2b28b4a93b5538c5055658d0af2f45f793cb3541c681d91341b7b93. 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/DEH742048970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920b036cb13200d9113ff0ee8e5e8c1d04a9d40951bd7e173ec4c30df3b4c254. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CA5KR2103855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09aeac4c8f4f4e648199bf86b70acba30a84f34d1a26aac08bdcf6c4a0e21480. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CA5KR2103857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb8c086834365cb3b97d96bfbd1007ee7667e2fd6720edadd3f1adb586ecab6. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/NLF1C2000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf056750b1879467523dc305f1ec8ca5c3f06197d3053f16161c4bb2314727b2c. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NLF1C2000038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041bd978f50376555d546950dc60c3acc77c898dfcf52e96e3d17dec51b292eb. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GBKQU2004147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde90c1cb7437f59caf80336a193b6eb5cb3776442fe06971c6c1ba585f40866b. 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/GBKQU2004148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b403f478a5f7009756f53da72970bccfa6188562a870242507b161c13c0d7b7. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ITC941920493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0962e1033caa51b5cd6b093b7ade898637ef272e2a3a006b102ee5c7ded13353. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ITC941920494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb433a7f2384fa9ab2a6d254268c9c2d998acfbb85dcd98f69a578a712a2ab47. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKQU1908499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14958698a7e9feb1e2b03e2960035e2b1a28d8017ba11cd40b262c9f861ce881. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/GBKQU1908498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d4c0529d89c3069f654d5b312b62d4b95eaad9cccbefa374a3e8cfb20ad78c. 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/FR1JK1500288.
Everybody - Daniele Kama & Simone Burrini Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815ba3c13e4f1abc159728f01f100e0aabf5fd0dafc9e05a3b827b20fb56d521. 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/FR1JK1500290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0943da6525ec35725d44550b1a6c5aebde600ccaed21f73176eb487e14d632. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/GBKQU2508380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe390a9b816dd7ef232ee443017f60eb1d3313727ca332012f7ea641e1c5bbd81. 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/GBKQU2444735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7893f6e50485dbe2af24542f340be4d5c84b92e8dd54662b4124e5fb30aa0c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEY472470368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff3299950ef84815943de256852c20f11b6d90a0d693fafad9ce67c8b363914. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBKQU2333689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b92ef6e358e4a153bae9b9eb85c1d3e09649ace0ad860a9446d654c55ea7cdd. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/US83Z2555238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9cdefdb63d6711dee86c17129b64d3a545eacff4490e15652c5866ab17c893. 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/GBKQU2593304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba84501e162947befcefdc95bb7410c314ba8e35afbaf41301dec1b0fcb7895. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/GBKQU2593305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16cd6d9048d7131c9b7439fdb50f947b37b1a29fe7d7a1850a248dc76fcdb2ac. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/GBLV61603124.