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 0xfeb4325d316892ae1dcd599b61350d43d0868963e8efe573ec12ed5cd2ee7980. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2cc28d73-394f-47e0-9bd4-78cef300957f.json and https://artists.proofprofile.net/proofs/artist/2cc28d73-394f-47e0-9bd4-78cef300957f.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 0xb1adac9782b1d6f905af47bccba246f7b6c38dd865a418bed2ef625511f09a1d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:35:54Z), 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/GBSMU8689266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931cc84d06d7061ae2e710b403b7ee149c2ab021e369c409c22aef0e0f05359f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NL5UZ2505126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1aee7da0b709771ec88e9db51a18a2138b3da6ff96bb84bdf4c8e96c9d7145. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:30:49Z), 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/NL5UZ2505127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d004b04b3b1537072c4a54ec30be03a3d5bbb38a278ecfcb502f421c42a1e1. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NL5UZ2505128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f4ecd57259ee5baea4d82d575ff38bd4d32397239eb05a1833f670178c6d88. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/NL5UZ2505129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721739360199cf89d911563db4c4773da8e41f8355bc7ee821b77d56834df61c. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/NL5UZ2505130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe381a7407c88025a97509c13248bc6daf2a2401ee4ef0fd8d63d1d18ea2bf99f. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/NL5UZ2505131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b96ff1bab732dcfdca1007551d172061563df55c4c9209574a8d88bb5a27be8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NL5UZ2505132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab56df2857bb2d6266ac792c13403ac6385d854f6e3fd081bf63966a27e0daa. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NL5UZ2505133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a504ba10fbfd08c9978344caf12a15bfe558631c65b9eeb8c9089b52425436. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:50:13Z), 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/NL5UZ2505134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe992c5c4778a3ef9d5f75b1532e36b588f8ca51772ebe8aa240ad608c6b10b73. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/NL5UZ2507004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1412795b90d940422d904f3bcd2bea5082e2aab4727d5086b9feb3c3cc62566c. 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/NL5UZ2507006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf21017049221bfb18124731f775558dae8236e67486d5f3ec7bd9914502aed8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NL5UZ2508091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f9c95f18c125697c101184dbd342b8a25925e4980f24cf6488991222ab15ea. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NL5UZ2508092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c4397c1464d19d4014baaacd6f9b947a58fa9b8db434dedae5edd2e963d710. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/NL5UZ2508093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427939abfbc6c32d70adf7b7bd9619e24b446f1f1b76b0c92930d8cb050ba35a. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:26:37Z), 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/NL5UZ2508094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed9c719abe0743b88a32fdd0aa00b4349d9cfb8f704419522f002635cc62a19. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NL5UZ2508095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc497018fc035ac9da903f816b24da5144ef24dcb8df48ba146d62564f99c5fbe. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/NL5UZ2508096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949975681af251c6cfae2f6e056226ba29313d23d3b660e78ebffcae0d0b519e. 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/NL5UZ2508097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04e466e7206528ea9326bd6bbed80531ad8289c901a986f85451f4cbfaacc1a. 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/GBSMU8919157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676d8ffcf9b59be9c294b7eef4d6785b206724a0f0b38b879700458c318968f6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBSMU8845933.