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 0xa1c2aeff61c291638a0d114287cb087036669ec2501f771d50b84a942f793d9f. 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/38d12e7e-c2a7-48a6-bc14-e2d400a4fa05.json and https://artists.proofprofile.net/proofs/artist/38d12e7e-c2a7-48a6-bc14-e2d400a4fa05.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 0x1ee4d3297d8780616d097ba966ff09665cb0ef0192d3d259c566d5f4d719ef5a. 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/INS182301384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4989a0cc78f126578a0fd1e00c1e6edc992be42ed648427ea519461f2e0cba44. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR96X2183775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646471607f00557984031c6f6859fec957e9e70b67762866f4ed31d542f4301c. 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/USA2P2353840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727568fe760f4ab0a0875cd28c318832d583bd23f8b89427e2b3f3a9c31a6316. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INS922300823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2a45ac93d1f4e7de0859762a52e87296c7b8ab4d0ba97180cad64e0b1865bc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2347400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544f1bcb10b86ba5ecde78d37ca084ecabaafe1f9141d5a0a3ef813b52eb1571. 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/INS182302347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec1d7434fcd3ce4b73f3889ebe4c200b57832afac2ee2b7f6df6c32f416fab7. 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/USA2P2340552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb19fdbaee2785ead86cea1faa3bfd59a043b3ef5f318bc8535439827389b5e6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DGA062379165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d257e2f77d5b6cd4aed8328c8d23e645837f96cf620c48cce72c28881d7014. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INS182302053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f16809d8af9c1273f445d75bfc64341a8c1a2484dc3e7739307543b29d4163d. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:03:33Z), 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/FR59R2311006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9654636a8e94e7543d8867a44f7fca79b22cbe749a7c5d9ea9edd2dc6be0b17. 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/INS182300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6306338a66c55c73db5883396746b5dbc4322497005820b97c2c17eccc9b6326. 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/INS182300251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17615ec73b513d136690db43a650a101a05ce808ed6fe5d5754e898d4a497fbe. 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/INE182225071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba1413145d5fd8989855d715f225eb00fee971a89f7aae82bbc63ba5591febf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INS182203008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915751f6f0178ff98af00928719480f040da2a0604f537891c1268ba20e9785c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR96X2229540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f96dd4fc9641df08305c3e0475061d48e268549b810c5046d82db7b9f6edcf. 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/FRX762122743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3605591c74ebd51817e9493787858ad9f4ac38746410ddb9b1ce5df076de64da. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR26V2041274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec8fd2506f7366b82360a92b2f32bd2c1ea0b7fd2026914c7ef0527ac7061f6. 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/FR2X42067422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2438952aab43288dd77ef42a85533f975b7227eadf64589b7fddb5502904376f. 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/FRX281992127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d689465acefbb9c93ec924317bb524bd81e8faeb7595d669373562343bd44c. 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/INS181900446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a050f94e9005e949c50ea4f8063299152410515e70e17b1c2c49fe6ed301375. 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/INM431800331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89ec0867735cd7e3aad8866a63a72be8ceb794a6f7bf8c31c08eff403cc9e70. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INS181801180.