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 0xe1ffdb8b9b8a02ef6232b41e16318d8223fc692545561ae9491d26b66cfdeb11. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b948436c-d4db-40f7-aab2-69085539a516.json and https://artists.proofprofile.net/proofs/artist/b948436c-d4db-40f7-aab2-69085539a516.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 0xb18698c83bdd82a826944bf92459c9865226c37255278e8c48c76e5d3c5ac66f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZNMX2109945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3597e7f914b93d97de855d1391bc76d22c8f96bad32e97b1b1c24fed216b2c. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QZMWW2289748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cc405db9f8ecf085335d7bb51f4a2655a50be2f9a24fb84bbddbec0f48e0ab. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:46:02Z), 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/QZNMV2313490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c164890fdf080c48525ff4f6cb942b778a70bb1a4da40b9f702ab1701e9bdbb. 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/QZNMX2484083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ddb0739d613af1a45aceaa6a18fffd651f8f8812b51716545f734f29205939. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:00:01Z), 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/QZNMZ2476931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e933a0c2d2e257952ada56eea5464c2727db73bcf7295bde652949ca81accd. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:47:13Z), 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/QZMEV2524691.