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 0xfd6a8a286370e9de76d7dacd656e30249956800269dbb1a9c9397ebfff69c9f2. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00f7f8d0-9ffc-41e4-b37b-6f3327ff75c4.json and https://artists.proofprofile.net/proofs/artist/00f7f8d0-9ffc-41e4-b37b-6f3327ff75c4.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 0x840eb673360d4428f98b63ac51cdf5f5fff2ca6692ed8b2aabaeae19d127cea4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USA2P1636538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d31190ed8183bf990de3f38c9966d61a59569c1b43bca7824b1c982e9f7bb1d. 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/USA2P1636539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198054bffbf69121e2935ece9407b94b6c1ddcbc44610894bbfb0c8493d45d4c. 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/USA2P1636546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d5fb758ce734b719f16d831993395ed3febf79036c377733a22d1505abe29b. 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/USA2P1636540.
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 0x272136a92c647433bcaa783f4e0486c701041e00ff60968ea03598af1773e1b2. 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/USA2P1636542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a83ffa82477c4c561695bb764b6f94fe0836f147c56f6a44a3bc2ce0d4991c. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/USA2P1636544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba89a1b938a9fc93dea36d11f8433bcf2fd035bf2a3f109e56a4bf18926ad76. 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/USQY51710491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d65eee42e6c4413b165c263b3d646cb99d0dfffb22aa8319ff81df63dd2f24. 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/USQY51710492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd94cabf9533e76390dd6590bcc5f8067a1cc6510707c3abf47cb61069beab84. 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/USQY51710493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e8d3b414ddd3c8305008e4ec95bc092613eeefb244904445abfe8430c507d7. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/USQY51710495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2417d618e4d04fe5cd75dc2611b741a376cdf47a054f5f35d8dbe77eedc9bff. 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/USQY51710496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5821c8b445e42f86e6cd59b910c9c34f65b9f23a711e87e1c24c6264cb6da16. 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/USQY51710498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf183c690d73bd32d836143edd0fd90e8dd27abe4254a603e1a27c833e1a70fea. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/USQY51710494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99785ca03be1ac6a13c07efc0bfca13b27fcaf1fc87935ad4111166ed7679c76. 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/USQY51710497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3439731292c9ebe994b9b5dc8995bc09d27a064f346c1e8d129a81d4fae60a8e. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USQY51710499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1533a64b65128db15abd6a31fb905272313fbe28e3e6182640b8c83e760e11. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USQY51710500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd017ca8c5d397db241e721e1e84aea82ef79efe7aa90263592a4eceaa0d069. 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/USQY51609589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a25a636bf43fab11dfa4cf10ff199d4b28d24e39ee379aa20ae194a12216b2. 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/USQY51609592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196fb3bc7876458c753a383a64171d69bc0b7a93fb6da5b20259bf5e1d0d0da8. 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/USQY51609597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200ac60541205afa75a8e3cf6f2584219b04e9647a263cf03a485d4407e84943. 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/USQY51609590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029ec1b4d6cf32cc9a45d112deffff2745f0b95a42087a80c302f0b38ce0e5fa. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/USQY51609591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3e965a974f47b795362924fb4ff0d6e38afbc45a2c3128a5cabc07de917af4. 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/USA2P1692889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5884dd3837cd56e48531fa1911fb9db2a9307a993def8fc67480ea267bb8910b. 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/USA2P1692892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aae89ca3d6874c7f6d62d86715eae1353c4a8c02830dfbfae673e13da18121d. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/USA2P1692888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af4c87187ae2f72898728ffd6f9d4f3c665fc08ada2389f650addf8a6f3080d. 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/USA2P1692890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe618ce92f49df427280a316059f05c9ccf7fc25997397454bc3dd9b35dcdbbb9. 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/USA2P1692891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f264b40a38210a447fb4436039a4f8f4221a297d65d6dd6d736e1238c12f72c. 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/USA2P1692893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774a3981bb142a79a6a00042161b7e842f0525e2b19505a64664e605f3942964. 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/GBBLY1102083.