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 0x2141825ccd9b12bcd87a8b44a37a6869007fa8b9690f2eb3cac1ffb0a38ea0ff. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf72ce29-5cb1-4117-a388-d637e0aa09f6.json and https://artists.proofprofile.net/proofs/artist/cf72ce29-5cb1-4117-a388-d637e0aa09f6.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 0x9587f0a32f557f73d0bae1dac755770d904718f78a5b61b7503e0c68cc6c7198. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/UAMB12319002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a700e43ca93bcc25bca49333b0e9cc9cd3629b58e63ed1b49332d5bd0c49f4. 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/UAMB12219014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b8ec37363b58fa6a64f5652b83af4f5a9d355945ef29729be803c1faacb1f8. 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/UAMB12219015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c56d039069bef53b5613c1c5d17603caa4d8dc749a5ccb90c3ff82b8f41e5d. 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/UAMB12219012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa1021b81988f227ed3362cb357a5df5baf84d8785b9d3f16afce6ed9f31273. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/UAMB12219011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bbffe4ee66873c1ee85266054738546321b11a864a6b430b3c11b373149fbb. 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/UAMB12219016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e0ec7f8f2aed7298142415e3b33cd4b08d2bbdcb929136b766ec2973f4675e. 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/UAMB12219013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004acd0c20c79768a66f28dd33050ad96886b5b4390353f8a2f51f494223ed57. 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/UAMB12419001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa46a9f5efe17caa1a2b34e8b0f77258b51221e409626feb7877c699ec1bbad. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/UAMB12419002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb43deb637255c7f96b7c65292af6ceaf56dc737de60a6bd32d19ba71e37a57. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/UAMB12319001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437986d886564d4ec26cffb6a9b1c393a49ee9cf1e17d40f0cc72c178f28b6e6. 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/UAMB12419003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a238e3161b570a03d567103c7874092b58d703182062bea326b7a93b8fd67ed. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/UAMB12419004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b77f95903d7fbe8f406712f624637ba5e0b902d6a06ebc905caf448a178033. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/UAMB12219001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa679f0e096912640fabdb1efbdce22acf10889a3ef1b8860bbd765c7eca1dd58. 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/UAMB12219002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5a7702bf3752dc2a7e7381b823ba1d7f4079fe262915e7d5dc0c85a27a4a1d. 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/UAMB12219003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74cd834becaf91df85682f8cf632a6479d3f68a1fcfd7406e667395b35a8a08. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/UAMB12219009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7f56cfc079fcbc9df45c279c8db3736b8bb973f5a40189065980c5f275367e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/UAMB12419005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa46a9f5efe17caa1a2b34e8b0f77258b51221e409626feb7877c699ec1bbad. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/UAMB12419002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004acd0c20c79768a66f28dd33050ad96886b5b4390353f8a2f51f494223ed57. 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/UAMB12419001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7fbe2d9b13e8602e35207231d44187602d398cef0945413db22d1fe017a485. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/UAMB12319003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb43deb637255c7f96b7c65292af6ceaf56dc737de60a6bd32d19ba71e37a57. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/UAMB12319001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bbffe4ee66873c1ee85266054738546321b11a864a6b430b3c11b373149fbb. 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/UAMB12219016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a700e43ca93bcc25bca49333b0e9cc9cd3629b58e63ed1b49332d5bd0c49f4. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/UAMB12219014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e0ec7f8f2aed7298142415e3b33cd4b08d2bbdcb929136b766ec2973f4675e. 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/UAMB12219013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c56d039069bef53b5613c1c5d17603caa4d8dc749a5ccb90c3ff82b8f41e5d. 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/UAMB12219012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa1021b81988f227ed3362cb357a5df5baf84d8785b9d3f16afce6ed9f31273. 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/UAMB12219011.