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 0x2bf65287fdda674794516a137e3b7d6a7820a2685f1ebe3f64749d6f34e90057. 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/d2326c74-bef4-451c-b50d-30b5e0e66e4a.json and https://artists.proofprofile.net/proofs/artist/d2326c74-bef4-451c-b50d-30b5e0e66e4a.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 0x0fa958929efbb58a22ff49dd6dc530a2c4d1b9d55b1d59a98e984570425c219b. 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/KRF632101033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15eec7925a201b49e2f15e824dba639cdabb3c9ebc5b37445b8a7b626818a28. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:10:56Z), 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/KRA382200166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5200964e132766131d3f6709112864bd3eb69c88aece519af4964ac04761505b. 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/KSA002302282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d30d08f4feaeccbc89de3d064df1079833747cc94fced0779126ac13e19bc1. 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/KSA002402701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9314e254a027cb4f45b8a5c61a8ab3d9b826ae1d75782ca98165a5b6481a20. 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/KSA002101317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0b17b49616bc48ad44fa820a34e82250a3f5683964ea63f425919855b8f64b. 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/KRE132200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985b674d05c278d4c378717f21e5162ffc2790774e6b4a51dcf5b64153644122. 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/KRE132200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae341fc052b137df059613d8a24d16c4b7360e243e78f2f6f9444104ab89704a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/KRA382301488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855aeb5095468c797e48c9453450547db7f419b09fc1cb4565c81029f52052b4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/KRA382301491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409f6ca1761ccfd7bce60ef6e3e6a59f262dbc7959927f896c2b2f8385822ed7. 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/KRA382301493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06f4c5bd278e4c23588914c9c933799dccf9366a2df2d5dd459ea90e2b4b1d2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/KRA382301494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ec9b452358ab89d5b20f5d8989f08677863b055c81c3f006c4c85c8c361abc. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/KRA382302295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f3ce3939acf6c99d906ce58486e372616a69489b60ff765913e030732f3b54. 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/KRA382302298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850323ba41b459fdd978d526edc0af72b9120ac1f6d78ccf7b99ff34d8993675. 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/KRA492100379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3836794cdb2db4064802a59fca2cf970646b4cf2641a6c766baf5eb16e312e3. 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/KRB462200789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c6f3e43e8438b8c116f8bef642e185ab6e7a7294000047d63867d4a5d84979. 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/KRMIM2467073.