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 0xbd33e1b415bb1808e988db1fdb108c150af56dc735d68eed89271b81c6cd4a04. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0597751-a18c-4a62-b20d-ab8640ab6ce9.json and https://artists.proofprofile.net/proofs/artist/b0597751-a18c-4a62-b20d-ab8640ab6ce9.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 0xa6a9fc0edbade4d2d7a89f0d8f525a4fa229ce6dd1a44946955217c568c422f9. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:33:05Z), 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/QZEQU2138167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ff54910906a9cbee295c275d9835eb2d8334392abf5049a74b24c87d079bed. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:29:16Z), 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/QZW9M2270794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9c0aa4d5a916a7ae1fd7138dfcc2739e8c7c93d90ef6fec79d31b73105feab. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZW9M2270795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce8c8a450b6072605156a798bd80263bd9856fda44669968b79cc542d78859f. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:31:35Z), 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/QZW9M2270804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e72bb7bc83c6335fa4c71e6a42e4ce1a7cd276bed40993b66afd0b6291eaa6c. 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/QZW9M2270805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9239af63ebc2fc40472a340b0fd312bb8f7a576568a5fbcf6767d0fd0519120. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZEQU2138170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69274b97565ec4349113d6cf7bc6d0626c33f8ce2484dec3e28434e58d85067f. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZEQU2138116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a351b945fe77db96ad9ec19c617a86a8250f5c172f4a98a10f5b98e509891a. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZEQU2137823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200273cf8f576fa638e32f4e3f28a88c5525fc5e98ccdde1dfcb2cdd80fba432. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZEQU2137761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d8569c1d81338251624dbade5ad938aafea3c0c0851e9b2464ed7bccbf9e55. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZEQU2137616.