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 0x92430f1480935cf961f92d6321b9e72c8127a0fcdcfcc040f8789fc589cab48c. 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/58824bb4-aef0-4383-a762-cb2b90fb21c3.json and https://artists.proofprofile.net/proofs/artist/58824bb4-aef0-4383-a762-cb2b90fb21c3.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 0x08369a830d7360318ce6d183e8887168c59d6a1184920fb5dbc8cb39a82284cc. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:33:08Z), 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/QZMEM2156052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45689b9fae62f1e6786d10d02d8a3c589ce920d0786fb0bfd9dbe73132e44396. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/QZFYX2246255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3af1648f46bb9513c7727b93d97ff5e812d4de0ce038c5891450fbb3732a2c. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZNWY2239386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9946990cb26a0cca110face44abdc4d6ab0399be5e89a299d29182a8808cb926. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZNWZ2202726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aee66c96fdd97cbd8bfad74ec596589c833acedebeb7b122b0b5276367684cf. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZES72300200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be15df9ee48d2f006f1dc36bea58a379ce79e5427a8ad830edb5bfb833ada0d. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZES82308861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d044e76e18117147244853673b35160d8f61f845715a0f09ca987b4df44b216. 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/QZHN82307851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf2ffc1597bd9b6cfad15e416eb0ffbe240a4a5600f3b4f002c9e099683a728. 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/QZK6H2371509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a571165de4c6263152888e70d8b1fa5b6b7849a4a2fc39ff5891c377df2dd5. 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/QZMEP2303247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09df868c37adc7b11fbb44352120ce29ae3572a1ce4067ccfa816ba8f96b09b1. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:53:00Z), 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/QZNWS2326440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900f85171a82aecae1064489095a6ca3aaa323ec136ee19b82b09813f3852162. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWW2390964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58b4b7eba6eda37cd062ed0a2feb685a25c578e0c08bc24b6bcc6ae2caa96b2. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZHNB2467059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ea687428291ff78cdad9dd08553ed10b3af0293db72b86075f196fce0cd42e. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/UKZGC2403328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7594ed67bad12ec726d5504419c95fbb86a91a87e152646ff17f0c66fa0fc69d. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/FRX282458795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb261eda1cef454bdd7bf454434e6ee118f4ddddfd5628609f1b30e7a515e91d0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX282458796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3003f9ca8817c0d18672f0552f955004474195ee518011ed6025801182f4642b. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:56:20Z), 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/FRX282458797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1694845c1fc64cd329cb8ef848613d5cfe9c4b7771d1e04bddc1f3ec05153d67. 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/QM4TX2498359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256de9ec93abd5c149cf523a44c30b3e09a4aa30387b1d4e49d265bfda297f3b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UKZGC2404212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1dfd4323fcc888201bacbc2dd537ff2cd5605cc6dc62eb703c87a2f1ee89273. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZK6N2582377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461f847235f1de4b11b324ed1d82233ac17927656f49fe1f88a6eb94d12ba36b. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZK6N2582378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3d6eeb404c13bebcbd1cc51501d06bf9bc6043c4ee274ea41b8f88fc1c7362. 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/QM6N22515790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27eb40ce24a2c081375e713714094be2cd144261c7a9ee16c35a821f23d4794. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZK6J2508375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6c7f9c972f7dc4f735a9eb87a8dac2e9da2151f8a58cbddb058cb785ca80be. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZK6G2555587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a3bbd51b77ff0fffab7f607b807e7e616c7537b65cf5e31dad3e4332c2fd2a. 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/QZMEP2540988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a177406a8b9801b2890ef14807f5f26194e4ff7295b2d2e9ac47d2eef62c28. 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/QZMEP2540989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3100b66ade7f413b0a5c90af3aa6b26fa5c4dc3e7a3db97f1d3db48162364af. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFV2557297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78467dfca1836f4e25e8b0a4a36b95034ef44f61978015d50efba3e4b21624b4. 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/FRX452476215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9157d8ac32a8e19027cf4ac56d3e6d37723dab2f54917f2e202c7c1ed9668ac4. 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/FRX452476216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e30e29e17d4d535952e61310e31647764e492fce39b0e5645b60fc53e8fd680. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:03:23Z), 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/FRX452476217.