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 0x97c8623986a5d817d3e234e8fa051cf5b9795814e2d5791b4a92f9f7c66430d6. 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/991e6cb3-e303-4992-aa8a-62c226d7e2c0.json and https://artists.proofprofile.net/proofs/artist/991e6cb3-e303-4992-aa8a-62c226d7e2c0.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 0x51c1166275cd01afda8c4d142b4fd3cd44adf5d78e6f6cca1ac23b8c89d0f3d0. 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/TCAFC2007279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99392228c26f4a925efb9b7c68fae98dd396246243e6783d8fd60562cf3ce928. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/TCAFC2007298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279b404aa764ba9cb59c202853aea173f4585d0c6cf6cd895c21e5c0185ddd66. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAFC2007315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0901eb7edf4006a8d50c6f2298461d8b740fe03bcb161cbe9385bcd6fbf55eb6. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/TCAAZ1173909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020b51de74538e6afb9bf67f0e0f1c8cd9f544fc26fe604b558ef012fb6c2246. 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/TCAAZ1176606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c402b5b5c1af90c429f10bc9ab513d446d3e1d0343ebb6ab20209cabb58bf8f. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:53:06Z), 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/TCAAZ1177676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69f9783c7cdc8190b175a285b5f04edbd3ecc75a5d83249cc6cc4db6ef15c82. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/TCABS1367119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf84be993fd218f89fc12b3ff66207d7c39545860a1d108aac2fafa19e34f79. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCABU1497411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab525facdc9404622cff5a23ebb2ed4638785c8670894271e54f76de46fa5ea. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCACQ1615624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8eb847f8bd5c2e25614d5c327397fe9c412ed68e6c0d1d45ffc4814bb967de0. 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/TCADL1842760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa68dd51e2867d3046fcb98b867dc25eee4e91196cce920aee19fb89fa18c91. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCADN1832266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ef93eee37dd809dfddaa4c853c30df8b44e62220201a5668bd272cabc77738. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCADY1870946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af59e939f0cf9c4a84df34a92c7f7a28e5a99a70f5bb64d84ab42e4ed33375f. 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/FR10S2064260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a966b620ec6a8ddb3de494420b03bef57987f94736e66a511a7adf793f84b17. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAFP2133500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd2d92a009f1b04a43c76bb9f3f286a59a1b1bd5cd49c36f19ab5d9d7d2efd2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAFR2190604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9812f7450d27eb53d9063361fd1ff35d85379edbc21c49a007230a39805ea0c5. 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/QZYFZ2455772.