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 0xc41bfb50506569be1836c04921cf2531a6037084529ba5aabd98008efeace775. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/78220ae3-7e23-4f72-8ed6-02ea662b7b4a.json and https://artists.proofprofile.net/proofs/artist/78220ae3-7e23-4f72-8ed6-02ea662b7b4a.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 0x236da95fa65df8c91bd1223f9c8d18b795f80efaa196ad241373bfd142d6f4ec. 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/DKP162400403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f98e5bdd712f8f8a4d2097c1444681670e539a0e8d93a96493d3a595f25cf8. 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/DKP162400404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a1c8b0251cd7520a82cf778cd8ee6be1584a636e8e8ecb771d0064c715e453. 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/DKP162400401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb14b4dd1925fdd4d4a080ff436a28a062e8bbe378f2b2d8fd0c965b88b72954. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/DKP162400405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f20c5565d8b91ef775ac1524015603729e191065916f576990aed9b8904820. 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/DKP162400406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ee2d9af4cfdb7032f50ee7a38e775520be9cfde82c2f58d6bc9a46aa5c9d90. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/DKP162400402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632b85a2aa89b90d068ced5e54008f662d1bbf26437fe931a09f86dd298ca4b5. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DKP162400407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbf7936eb7401f9a17dc172424e843e6ef928110d2c1ccd64bf1c29ee7dc073. 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/DKP162100501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0102ea6272e1ebbd7425f0707fa5dddf1d095a867802d5d52c6ce9cd639a6473. 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/DKP162200204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce768791c09689dc0ba0b0e43f6cd96682545b8d78fe9052dcb8d6a849b1f46. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/DKP162200205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b93b706eb615f6a1f99dd0d768d157e81f954eb8154cabe6b870f80ffd47a1. 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/DKP162200203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37bc2cdd149560fa235d90454e47702111996f41be24e3d79b99cc134cbfef56. 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/DKP162200207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874d453454b7fd55712d7e7bb411ccf9e14a7a8bfdd883eb0b70a35d10499288. 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/DKP162200208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1a15bfa28ebebea66511a2aa493d431bef0024be1c798ab93766a00806e953. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/DKP162200209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8da7edfcfabaf17b7ebc09d1d8ed709a13bf13f2db23ea287edebda4179dd90. 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/DKP162200210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe74ccdfb91d8b6ca3595f5631f85492dd00680ec22912ea395c40d6915a222. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DKP162200212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc451f354fc94e00a2ca5af7a18159333930b46e5db715908cab0cf72333e7f8d. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/DKP162100502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce74c62c1eac6c8ed0cfad93fe8039630dfc83316720e1db2d4385615a922f1d. 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/DKP162200213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51fce37add0263efea9f38fb62acdbc72dd3bc7f3fb2fe6dda9b66351ff03028. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DKP162200214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7ce843f8d99400865b477861299beb4bae3ce0cd43c9d6cdc2b3e75e28587e. 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/DKP162200215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7d3d4df6cfb771ff0ce03299538240f29a48186f5b5c805e833d49f2177963. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DKP162200216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3539e237c86ef29eb5e731e88f154b462aedf69fc72ec4a1a5b181fe511a2514. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DKP162200217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ee2d9af4cfdb7032f50ee7a38e775520be9cfde82c2f58d6bc9a46aa5c9d90. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/DKP162400402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a1c8b0251cd7520a82cf778cd8ee6be1584a636e8e8ecb771d0064c715e453. 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/DKP162400401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ae564db28adb5fc7f646bdc526a5c4a6100c6bcd098147c4f0c5f81627e5e6. 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/DKP162200201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc451f354fc94e00a2ca5af7a18159333930b46e5db715908cab0cf72333e7f8d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DKP162100502.