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 0xd3814d9d8c09447dd83735614f763d30b019220c4087dae5b9c38f024972af54. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8ca408c-f28d-4caa-8519-d6f41f3fa27e.json and https://artists.proofprofile.net/proofs/artist/e8ca408c-f28d-4caa-8519-d6f41f3fa27e.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 0x488b29f7b75f7dfc13ea90506c3470689abbc61611503dd86d5aa7d3408b608e. 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/QZFYX2122762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17787ec0072f91c92ea16d9189b036fefefc9a0fd8eef8823b3c28bc60ae4a48. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ITQ002400215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87972e2013cce481fd91ea0a6da33ef318db0c98d0255982c7b162ced2871954. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ITQ002400358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17787ec0072f91c92ea16d9189b036fefefc9a0fd8eef8823b3c28bc60ae4a48. 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/ITQ002400215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeddc9191ef50553f4e7a8627a377a4eae1cdd177ea152b41410ba50eb82d9c53. 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/ITQ002400729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2d28af576f3e303dd90022d7ed44f99b7f54b2019b7be19290635467385d3f. 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/ITQ002400838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b15bce2f3144f5e922919bef07883f563491a7b61c67d0893bca5dfa685f9c2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ITQ002400488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05544ec6dfa380d242c9a04090ee50680d937393ec83e0037b513cbdd60d0c3. 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/ITQ002400732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a5db9ee86d3e3e9253ced1890022d21f3ce1a06272fa26dfc18b1f7e305063. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ITQ002400730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87972e2013cce481fd91ea0a6da33ef318db0c98d0255982c7b162ced2871954. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ITQ002400358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17787ec0072f91c92ea16d9189b036fefefc9a0fd8eef8823b3c28bc60ae4a48. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ITQ002400215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd66af107b66f869af4c09e1e2819bcb89f5785c401be3f22354a0b07e009217. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ITQ002400731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4192b21dc1fffe65666e909f1bc743df572b5d5455123016b1325230809602c2. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/ITQ002500763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4ff9fa4f29e9391f108292390a7ff3782aa02eaf8e162601a84dba0230e667. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/ITQ002500399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c456a273b0ecd8859336c65c8f30e3ba8cac1cd612a2be7b0e5d6fbf82e8903. 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/ITQ002500657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ec57c03b7a41db4a760a2c8f5b188675b82902f76399a61ed2372cd02b34b8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ITUM72400900.