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 0x8c57765fc9292388510525d230f0fb3279d5e0047e56c4788fdd4173b7b66778. 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/e31d834b-7276-43c8-85c2-d03815b5e206.json and https://artists.proofprofile.net/proofs/artist/e31d834b-7276-43c8-85c2-d03815b5e206.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 0xad239bb5e30afd18743e0d2df9ee2a1c85e57e8f42c801920b6ec64f18ccef12. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR26V2008113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b358503c78abd9b366254ce49f44b1bf49e01d573b005a0b77840286cd10d02. 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/FR10S2190008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72759703f1fadd53bdc3df07cfbf07327951a4368f8a545321d79f516196a33. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/FRX282125429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95fd38ba6ed09e5cc39bcf697a6fd03ed8be4ecb5d68a13bb5497491e0c80fba. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/FRX452100183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc955e3b553726383c7351fbee5d517cf157685a2f1c77a2bf17a15def2337416. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX452165273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a98f9f260c911201b71c48533aa5280520451913fd3e9c310eccf900e84b414. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:23:19Z), 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/FRX202213698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f55ed1f5da57e344ec750bf052874aefcb0c1a8a5aa41c00dab6add425e397. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:42:28Z), 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/NL8RL2502838.
something ended before it (even) started
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c7834d6b4c62dcf541d499c95400bc937c2b0acd88da70dd74f6a4b8e2f6d0. 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/NL8RL2528845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036773d94f0909765ac6afcf4cd1f4b669db730cab2866fba0e5bdaf08852d0f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWS2454211.