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 0xc8d6f5b3c9399d8d73cbfaadcb97e8d4dc2b162dbff0b7b478ece65e984fe4af. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c1d5db3-720e-4b97-92e0-78d7116564dc.json and https://artists.proofprofile.net/proofs/artist/5c1d5db3-720e-4b97-92e0-78d7116564dc.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 0x19ec176e56ae28d2b78658b3f0c21d25a1ac06ee8e930aad0b981cef961ecd91. 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/GB5EA1301539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de4c6852711cf0b8ea2613124d5171853ee2a4b77651ebbcb85c3bcb2ea4832. 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/GB5EA1301540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1670caef4ab40ebf279b2f865a23c854479ce5a5c494a8dfc96fb7308f56fad9. 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/GB5EA1301545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43129b9747510a54ef6110a0f595c8c058aca24c3e0b48470ffc8b782c7f4fa. 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/GB5EA1301548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124f28f0ad38a9bc63e70c21ba14e341ef0b9a8011357badb44267c96c52225d. 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/GB5EA1301549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bc55f7c8cf9506b332fe5c8b4b6bf427810ee34b29538ac5155272fdb03a53. 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/GB5EA1301551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcc6a7bbf9976e3f2ab40d95022c78e0887d2ea0e50a4cacd7e765b137725f1. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GB5EA1301541.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2cfc4401ddafd836079b68fa26550034911c392c619855278052ec57a178bc. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GB5EA1301542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8195edb582f62c95f24adc1e6bc400e1ea0d26bfc38227aa52a588c9b4913d88. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GB5EA1301543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643a2e6f677ff1649796668d8be0ce45d833d59d89b8168757f7217d8ea9327b. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GB5EA1301544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9598d8856aac949500e2b02fce9c72efdc6cb8630b92b93e0e5ba944bdca4784. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GB5EA1301546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987b2d2b9f513bb356d64ada360af3092da206297bf0cf15df3ec9dc5a2546a1. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GB5EA1301547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4a297af0bc1e9a79775ed2f6bc804b2dcdf3c9e3749867237c9df2b163ccad. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GB5EA1301550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82dd95b6dc9a080a277b1648f7009bc0519f6740d2b90e5ffde5792fa103b591. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GB5EA1301552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f273aa5d7f459358038c13568ced4095e88ce6acd7d7e78468c902548e1e76. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GB5EA1301553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32371dc8ee3ad6fbcca4930b6ffc0f805c50b3c3c806eed606b4d37294634f4. 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/GB5EA1301419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8f151bf774ee1c78536a0e2be8cc73d66459c9f447a2f210a2a6f0298a4a33. 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/GB5EA1301420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d293818cbd7b90160303498a1a697c0ac9757e73ee721ace7d6674a9c72fd6. 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/GB5EA1301421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8f63846d062cf24d63cf8c92bf3a983da0012b762b9c270ca46d40673edcb0. 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/GB5EA1301427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcab965bd887d34d51f01f483631195a3ffa198f6a946026db5803f658238e89. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:28:51Z), 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/GB5EA1301418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae8d3e5cea386a297738c51630cf14e33c4cc8d31eaeec368a5cd4ac71debb2. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GB5EA1301422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f98bf0f4c0959dca81fd229adb2709785a4e4747923899b723928ccd7f765d6. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GB5EA1301423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f002fd47c02b38f8dd0196dd6b57fb755d642fd3a338564c96456496936385c. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/GB5EA1301424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f55491027f711c2b05583cdb413bbba8cc9ebb47a912fa2bc958b2b0192caec. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GB5EA1301426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa09f532bb7a70cc662fdf53341206c45b64d8456be2ac22a5c0062882b7020. 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/GB5EA1301528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8882416da505bb933a09903304fbaa76ec6e6d5488df1aae65af1240e91c761. 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/GB5EA1301529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f677a621d23f34ab678d7fb3d2c1949147d4ff72255815d08c2a84a871c72d. 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/GB5EA1301531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003153ba82ccd5248a767d4d6dc04108d303beb5b27919dcab2c5ee5d36ef329. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB5EA1301532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69501323413c95a3c7dba8c197e93544450552b142d79300950b884a30bb2d11. 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/GB5EA1301533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db3eef19cc07eab49a02c4b96c68ea0f2e80dc9ab79dbb5b7fee68e8f6fcfe4. 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/GB5EA1301536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8248a6da86095fa45f922d2790165ea913eb577e74a3722f50214fe5a99cc670. 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/GB5EA1301537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261a1ca61da04eb5598917a761789ed72798c4a0e191928e9727f68a885895dd. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GB5EA1301530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ed764fab791df30e1c5332560093452cf595005ff2b0594680606e42df01c6. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GB5EA1301534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b3fb419e93533fd8ece5aefecabf2002edc581ab7e04111ec76487b5b10c79. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GB5EA1301535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4e5eb856e74fe7cf1aa367d580ac19cf6b968e836fea66522ab00b50e5b123. 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/GB5EA1301391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d7a77631b4a1d89eb46c726436f49687426f325fd1c0e720e27f14574b00d5. 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/GB5EA1301395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3d7fe8dd1f569005c43d78063a202ff39a57a141bc1cb2d58f3396eb14bc30. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB5EA1301397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffefa06c5a67b8412340001015a91df92de646f25baa268bb174a5294ae9091. 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/GB5EA1301398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f8696777e931acc2fb91aeeb98f5df332962ae3f02991f81d04257ca37e630. 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/GB5EA1301399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9580abbb0a102175ca315acdca795a21605805d12400bf2065fb1669898205. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GB5EA1301393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f471d6e09f28c4cad6caf07d9acdb760735be8ccdabf4278730f58032556c8. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/GB5EA1301394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f51443ea9c7519aac0be3ce333996526776fa11f2c7598a5807e18d74bf7b1. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GB5EA1301396.