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 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 0xea269f9b54dbb14ed3551a1415d51f22d81ac7e511280650a35e1d797150f96e. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed763612-340c-4c0d-82c7-62c48892243d.json and https://artists.proofprofile.net/proofs/artist/ed763612-340c-4c0d-82c7-62c48892243d.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 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 0x53d43b1c6901c3f3dc26e1740a17f4049e2fadf306add85b42e218330bcb01b3. 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/NOGBB1710020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52096b88f4db0dc334e783448cb37bb3430797c59aeba2cbc9956b87cfc58a44. 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/NOGBB1710070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023a90af9d28a4614531bd26f00669fc380836eaa1e2fd9dee06fc75264b1e70. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/NOGBB1710130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31be1777140fa97e29f1d3b5f58a7314b6ec028a69ee4c115f55ad61d703d69e. 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/NOGBB0401060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2d6affda2fbbdcb9e4481723711b59a1f9aea11f77e96e7b4a55209f474559. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/NOGBB0401130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb846794e8a544eadfe14974fc7f9bee9592c81c104ba3c224113073815d0877. 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/NOX9X3241603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76515776dac1dad56b9e7cbadc066be626d4a4555c7a85812ce4ea7bba2acc0. 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/NOX9X3241618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6469268c66f693aaeeab8501d2c5bd77e2fa9bb29d8b8058ce9a08694fc4bc. 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/NOX9X3241622.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc211bffca1187e6e26b463dbb61932ee65f51d603fa14614cda08af4183c16. 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/NOGBB0002050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e6049e49156f285a18c2b9065db7b19285cc936064d147f559ef109c065785. 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/NOGBB0002060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51489ff77bfeda95862de591de5bd85461fafa2a41021ac017da8546e3f855ec. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/NOGBB0002070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84382f32671941bda724d06a036c8ea3c12174229f115ef6d80c28e028f38550. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/NOGBB9902070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb45bf53aebc7e863676e0f95f0f9c0fea782698a360c073f5662aa65253a1fb. 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/NOGBB9902210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8143e471df5ca1c99c19dd8773f42e2eb1a1143514db1cde3c0871043e4719b. 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/NOGBB9801020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55bf3858e781639c555f7a32a76c85a9bd5a136d4a0602b61cd73dd0094b087. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/NOGBB9801150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e8e9c14bc44e1140a563e15ca7cb7020d650df02386c7e7303f34bcee66dd2. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/NOGBB9801230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33c9fbc0bfb5c6f56249abeb58a5c55111fa90d54a99dd2e63291f75fad9afb. 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/NOGBB9705030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d96cd4522d582fad22ba3b4cd8b691b7dc8b29f9baab239f175ad4d44a97d36. 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/NOGBB9705090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31d136a7f42e81b85d12abba5118ee14cdc34fdf28da8adf91a8db27f67f9f6. 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/NOGBB9705120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751b3745355f7548b6183893e6d5be51a97db28d2689a62268e6cc42f258b88d. 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/NOGBB9705140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c320163efa45e4a545cf8c4c9faffd1084e9877e9ac0859a43405ab4fc4e364. 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/NOGBB9705170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5b821ecdff4ad5c706ea87d50ae830fea76321673c862bcad6b7195765b40d. 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/NOGBB1720010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc15cd6c6a25e2b94eb6c0a901af664dd396004f851755e6f4b55d60a3b02e4d. 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/NOGBB1720020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff87b9339e163ff05f9b857d1cf6d5c60398b02fa5551bb062c8ef1cdbe8cbb. 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/NOGBB1720090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9c63fb36c9e3eb00c47d7d328b47f67069c6d07db085c2ddcb9c1321b133d0. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/NOGBB1720100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7356eb609efcf5d7aa18f9d0fb42e3c09542e65b494e01c461b42df2ee7311f2. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/NOGBB1720110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af4b6d7d48b9434718d85935335f188c4c5c9d91b860f2693a75a563e8c3792. 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/NOGBB1720140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8faecf4737f4bcf7a644d5db50a6a03deace35c3b062a94570093190216ca645. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/NOGBB1720150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a62b0604b56cb9e1574054ab344dcfb9b0f022ea6a41235d992420c09471cd0. 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/NOGBB1720170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24bfd8a209f0b1d2586fb7240d382eac914c46f601b42f38091e6f32c5d88dd. 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/NOGBB1720190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11968673d310be1293ae11097d473e9ba54a26c876d0be9e64df33789ac4e72. 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/NOGBB1720250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2d664fd9088c7a42c16ed6dde573bcc80be463f65e34f9bc12e4ede63e300e. 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/NOGBB1720260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f37e8bb13eb4cf3dde379a57e1e2513ddee5bc039e3f0d6ee49c57551b55fb. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NOGBB1720270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247d86a4bfb497aa0c584b360a03499beb89779b99309173bf92d551f4ffb718. 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/NOGBB1720280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4e565dcdf4e5244782008f5b1592efd2f3184c78cffca9228a3765a6c1bb48. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/NOGBB1720290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea4e186e75f2c088bb5c5f262281bdce156747a46929d3aaa8075e5919e25ea. 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/NOGBB1720300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580f18ee7c590b23e205fb3af89f37c0574483951cea53f435ab2c60ebed0caa. 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/NOGBB1720310.