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 0xeb230ffbb335e23040069ed7538fe95cc13f8c2008d520a812694d9fe8204967. 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/7a1207b7-570f-478e-b775-8b57ff5d1d23.json and https://artists.proofprofile.net/proofs/artist/7a1207b7-570f-478e-b775-8b57ff5d1d23.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 0xe3a28420afdf6992764c3efd6eaedfb921c63f11ba1ea9c7dd136577d1f6e83e. 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/QZES52031815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0396ee7d0ded8fa30b71ca245bf6e13451c166303d19480248a4443383de896e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZNWV2025082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732abbdb13ac507c950e6c5cf572e12a5fcb50dcc0fde19d63589d270eebcedf. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZDA72173538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfc28cecefc8f26401632c805d312b91b81c512176bdcf4078625cf068dbf27. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHNA2140539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558258f651dde629cbd48ca53479af494c13342d7a359c25276a89292736c7c8. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZHN82210571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4f5269f7856138d58bef1dab84f626c586b945608bd9bc490fea6cc2695c55. 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/QMBZ92247612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bcf557633559414afaa4a6b41c9c4095fa56733d408e254d7152879112c68d. 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/QZHN72300239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb87a0a79d96032b6beeb9949a4982929123c998b04d4704e5f6d94232c5a5ee. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:00:29Z), 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/QMBZ92332433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73072a9d29aab6239caedef8f3ce1c9c47521a249ffac2a55b7d9992a31efb52. 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/QMBZ92398506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa8e5bfd259571a5eafa9763b8e7c08c76468915813ae37d9a79079dae4a17f. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZHN72432877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278faa3bf8d6ad451dc6b3231ca9824e1ce3bbd7f9d8a9f81af7c5bcd3f17a8e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6N2473093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb47540b898b9755750ce2cf2fbc5753bf0a717114904275204d86d6e2ae567. 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/QZK6F2417377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf750b489ebceebac08fcfe7f2bb596e597f407fa1aa1f3f3517b5d24900c1090. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWS2442791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b130c0b100470915f45ae81817cdfd075d76f6cf585c2a210892f402856b6f. 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/QZTB62455219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06f0fb2fafb7b61ecfd78a98d9fe34a9b21ecbc69118f154bfc8576130da2dc. 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/QZZ762483606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece07814e83663a75a813fc799dacd83a9ac4ff56004dbff5fc0589a5536da04. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZZ762483607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4675e3ce73bc4d86f043177a2e918cb7878c64c193d25ab82ba630826c42bd21. 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/QZZ762483609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73af31a9159516519bdaa0c27defe15fb9f7f623080248f4c18c798073efffa3. 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/QZZ762483611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b130c0b100470915f45ae81817cdfd075d76f6cf585c2a210892f402856b6f. 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/QZTB62455219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb158a5c60734affee446750245ec6f5ae5c4eb2a7520329b677e75d5b4a8786c. Chain 2 (Bitcoin): anchored in block 958863 (2026-07-20T10:27:46Z), 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/QZZ762483612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84872bd0b7eda2f194aacfa9d3008cbf578086d46f36185996a9de4f4e090dba. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:20:50Z), 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/QZZ762483613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7099642095d7c68177592becee9fd0fa77e5ba62ba7635984bb231fab76db9e2. 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/QZZ762483614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891f2882f886e256b44a66c392e770b2ee2f2936d9a71dca28c5754d0f7d2225. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZFZ42533481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf50c7265b19ba0ba36b74dd84555ae5f72eb60daea427a65945b42667be81ed. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZFZ72553808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a31ffebc460f727ac78c6526f5e869a0c74106ac33b83ed6048bcb85ffeef49. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZDA52513632.