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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7c16aa89d19dae7063a92931622247de8025cd7548b824dbe902a7c12c1477. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2bc6374-69e1-4079-94ba-ff104efbb6d3.json and https://artists.proofprofile.net/proofs/artist/a2bc6374-69e1-4079-94ba-ff104efbb6d3.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5302d98cf8e0e6f6811e94766dcb90b0997b89b007cac1455b3cbc51302d3a77. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ATEJ82106201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8ebc8870387c3fa95d3ca8b0f23a0b4e29df3abcc76bd1039cd9db476ee95c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ATEJ82106401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509de69f1a78e4049c64a4511cce8589e3726a3706bcea89364da027f53d2ed7. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/ATEJ82106901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a971840bb094f1a6dfc3e1e89ea46e211ee3178addacd36a409a68d6c62e7a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ATEJ82208401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f32bcfd520900ce39c61cb51e5763bf6658246e1a53ef3ffaebf3695d9d41d3. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/ATEJ82208501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049e48f8ccc3f5e12284fd1a5de1eba3cc5457fe5b7438740bb5cd436d1e55a8. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:13:22Z), 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/ATEJ82208801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735810ce29e14773b13938a82e547c32b1c91a5e568b319d4a75cf02f99e5e02. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/ATEJ82312401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80338521f29c83c75f9ac508099aa47932f49b5d5a7d753697bb1dea7af1b5e. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/ATEJ82212501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf195c54eb2b2431ee16164a24e9d2ca0047fae2da10c0cf19799347c0c9a39. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:29:08Z), 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/ATEJ82314401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a6d3c5e6858aa93b14bbe83abcb13a3ac8e63ff43b3c24a932e85cde236c5f. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:23:37Z), 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/ATEJ82521401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902141c9fc5557ea8933a1245649cbab1577e9c491a47d8ab73b5296d1dfb1b8. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/ATEJ82521702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719222f8053f0b0c81778de056590fc8cbf280ef83329179b4606666df536341. 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/DEZC62119441.