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 0x62338f1b2981daa68efdcb6b390921adbb59d54be42875816cea6d1294a7cd19. 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/89283758-918e-4139-af6b-d97fe9387651.json and https://artists.proofprofile.net/proofs/artist/89283758-918e-4139-af6b-d97fe9387651.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 0x529b71fdfcda880601a74a1bafea596a51ab392c706b973f7db835b39924ad3d. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/FR59R1983591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e715ff72b59d64bdce1e57da9d9515ebe1a1c9e034d36e9dcca1dba6dbb8ca8. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/FR59R1991796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977e4f7e08b9c4b6b26a1bbafb2db67af4ec4e584be6ebf50e002ee69af644e0. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/FR59R1904571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529b71fdfcda880601a74a1bafea596a51ab392c706b973f7db835b39924ad3d. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/FR59R1983591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d166aada4fb184c96333dc2942d723bc743f0491ae0bb1e8f57e29fbb2b2d2a. 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/FRX281965142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b795c5d8433d31ac53052032bf62d4ace6dc41bf578a93909e04d78feca2a39. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/FR10S2062888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfeacc803823cc60b730fe4426a6fac7ef559055979d1214d31381a8dd41804. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/FRX282065839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfeacc803823cc60b730fe4426a6fac7ef559055979d1214d31381a8dd41804. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/FRX282065839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2210ad8814e957e9c1754f1b652096911cd5d18e318db77156c1b1ac5ce0f6f. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/FRX282065837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb02e84ef7b46408139d4e59f741f7090505928f2df9aeb5544595e0d1f159a. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/FRX872018968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8370bb0bd36f3e3578ae7a4520bfe136d07cbc33acb1078798821d39e7b6f080. 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/FRX872018974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a6b2bc8283cd25a04644962cf9a50a49b34a04aa63c441d7e34df06ce43193. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/FRX872018977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc02567e66efc8c1f7bed0f49ee7cf3e3233b300ac513b8cf75410e5d779174. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/DGA052049095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9172bf0b21961df1f81468172482ff88c54a26c58c72ad79e078f0de523b6c62. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/DGA052049092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c733784b24a53be053ed9afbe1fbb0e863a54a605a62db36630a250c5d0da0. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/FR10S2129005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037deb300f3e496c76ce2f07a95dfa4c2829ac4b52316bfb47e57acf07d54d18. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/FRX202190711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0225791ca33c1b6a0bedd4e11a25de295fb20611e820726396b428c9099fb93. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/FRX202190706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5aa504f5e86e3911dd25b2a28c469658e246123149fc0cf44e6f73c41c266d1. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/FRX202190709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f4a4848f8d7e3933edaaf87b0452bba650c73a5916d048042ffb0c0f4d14e5. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/FRX202190710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd499eff18ab5cbb0cd4cbabd460c6996b9c6196c7881ebd931bd01d802aa9534. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRX872244851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05ec58ff90d297a3ecacdc659ddb81bc78769fa994486181b5e8f4ebf714c4a. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/DGA082223547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc26a7ac5fe7ebfedc8eff406f0f9088bea9ba00c3f556e7171d332a1191cc04. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/FR10S2364456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820cac5750fa7e2fd71cfe5d8a43b17ac4782c89d13c6540f40282ebc6755d2b. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/FRX452341299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd289e282b41b7d261d3e3e6fe84e45138dfc8b375831a5d7d264484b92430f. 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/DGA082394592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd499eff18ab5cbb0cd4cbabd460c6996b9c6196c7881ebd931bd01d802aa9534. 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/FRX872244851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820cac5750fa7e2fd71cfe5d8a43b17ac4782c89d13c6540f40282ebc6755d2b. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/FRX452341299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c15088f41c9daee39a571e223307cdc2291fa66006a5d9ea20de6c417def179. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DGA0M2332799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209f99617f4cc4e0ff6a95637cb9715fd2304c5b6b601619f99278ce18ad7ed8. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/DGA072464481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1af0e879d7ed47d541232071def1e32aea18163ffeec469c2ae6614eb0e9410. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/DGA0Q2498431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1af0e879d7ed47d541232071def1e32aea18163ffeec469c2ae6614eb0e9410. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/DGA0Q2498431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16da7ecc8336c34871d3dee420a44ce60d5a8085da2a06ee4b53feadcc9e6ba. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/DGA0R2494973.