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 0x1c2bef62009626499c7b885f3545bf4176c6444764dfbf01aa22993fb2ff07fe. 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/9db756da-ac58-4695-85fd-bc805e8e3ae7.json and https://artists.proofprofile.net/proofs/artist/9db756da-ac58-4695-85fd-bc805e8e3ae7.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 0x77b4a367d843bca2e1cc42d61b6c0c077b4778fd09c07105c9b21bb51bd8b7f6. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FR96X1903182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c7e61862bf22b9a92af6bf486ba42cd1fa610b99539f28f35ab7ce8432de81. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FR96X1903138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3cae6b9d71d8824fd0f832b29404ccad050f9b6f69674a4460bc1d563245ef4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR6V81980804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee82c584aecd4f44162d0f28c16b98208977a5be5f00a6072422ef27dade4f36. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FR6V81980811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8134cb580677808be1c3804431529922981ae7a02970b9f5b579e9e08f69c30. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/FR6V81980813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ca65fbef624c1a27bcb40b0d1846e4170c091c8260eb56f2e16bc81923edfb. 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/FR6V80891085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02bcabaa71bfb33910d21d0d6f5024f7ebda4edb110e4990797cf86bacb2e796. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:36:42Z), 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/FR6V81379908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3d49bdfe96f29b67e22c7883434c66fd16a6d6ccf4ae9c96cad55c5ce3a7f8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:30:41Z), 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/FR6V81379912.