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 0x1e8560a5567ee1c1068462880f85f99d37f9b5211d6d5179bbd44036ca49630a. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f917afbc-c009-40a7-9b79-37746023e5b3.json and https://artists.proofprofile.net/proofs/artist/f917afbc-c009-40a7-9b79-37746023e5b3.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 0x79edce88d79e75a1b3c95b3598c2dfcded4d03c4b9ac56e5ce056b6bec8e1305. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:08:15Z), 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/DEZC62130661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1407b4f5e832e71eec006f08f6aff188f3734c24c6574899991be992698abfb. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:16:14Z), 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/DEZC62142097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d2b68a1af2c9f82eed09580a7885bf5d306f731549a2a907bc6e2bc09587c0. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-17T00:12:42Z), 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/DEZC62142096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda29009c16ba208fe9bae48356b323ebab431678a27cff2022e3ab0bbaee16d. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:05:00Z), 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/DEZC62249678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1afafcf209eb61e27f0d9a4dd9c48e42810241d9241c300ae68547a8bad186b6. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEZC62289461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1668131c77a304bcb090403585853c01e999af72f4c86a7bdd9d0bb034df92bd. 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/DEZC62409070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9765f27e85fbbf4958f1e03c0c538cdc9a2a6ac17f0f85dd78f4705dc449c6. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAJO2525032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872d7c09fc011c9c247dd2ba17587cb32c664c6601b35b15d7661e258dd8ce55. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJO2525063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b5f6625904e7f8343331bd666d25f36b556e7ce60fc17bfeb6a2f1ca60a91d. 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/TCAJO2525131.