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 0xc84537c1c9a21bf6676151e3f1a653cb921de37e9fcd020fff5c0b6770438cff. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/61c639cc-d90a-49e5-83e3-272052719c4e.json and https://artists.proofprofile.net/proofs/artist/61c639cc-d90a-49e5-83e3-272052719c4e.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 0xfd52f201f0dd15d7c98b792871f5ce541c3ae4f201a53df35bdb999fd6217151. 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/TWCC32008316.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7851de5f1216da2ed4a384668aaf9389dac6a555dfe52a47340e15d29d01a2e0. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/TWM032413001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8630c2d1865c92a097d904fdb63fef08e6bd3d7cc752a7a85501fd3839daab. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/TWM032404002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400babe12bece7d0ec9c55610081ad12640eba0430acc696c731db2527ce4b0a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWM032409004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce03ddf0fbcf0be183d8a942ef5271d2a83c6a5b88b7b4fe543c0c47c2fe2e7c. Chain 2 (Bitcoin): anchored in block 957198 (2026-07-08T15:54:54Z), 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/TWM032426005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e03d0bd7bd86679f79acf0a84af3935805ee5b460452608a2b8da1914fffdbc. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/TWM032404008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0448e15ffcbc971e183aed168f9f877381765a17bc508b62bc8e7ae1d30a4012. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWM032404010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54402fa92bb37d5614a963021de5fd33d574c1491f4873cf632ff9e4763a09cf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWM032428011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6499b9bf81c5fd47ae2ae63c3be71882fb82381be5b5d35d07f78623459533. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWM032409012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cacf4d4077aa12db60f893f762a4ef3e1043c4e0f73e1770eb01f6a1c6eed9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TWM032438013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a8775133c2fcb75b7ee43246ada75958c460b52df75ec739885ff2e6bbef35. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWM032426017.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa005f90218753ff4905dc36154b5c4468bb6113af8be767553638aa875111b3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TWHQ32000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe2f52ff775e9a3ea4b6182f8ff33bdbb268d3e732f58f6e55219ac40941e5c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWU712203838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb87253c25446211c8d4c5c2ba778b7d28e7949bee993d1c073452f0c592549. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWU712201306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf8fc96d2873cef7df6784516c7aaafddbe011ff1e33daaeb37e3794237d414. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWU712103492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240b3a684de415228831ead761e1298a6289f25af51d5b9d9c2304c83af4da32. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TWA472008006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aac1ba9a5c18dba2b442cbbc8457d268c6f78a6e9f218884b607b2461a312ca. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWY332400003.