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 0x7db31990e8f3cb80fac68beed61462e1317857827e1248a95dbf0a429394c41a. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9ab24eb-f7b6-420a-b134-74da36d4daee.json and https://artists.proofprofile.net/proofs/artist/f9ab24eb-f7b6-420a-b134-74da36d4daee.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 0x22d8e4b1bcd4c3279b4f6efcfca614e242c940da621097837d6926270d2b1d7b. 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/FRX991513513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3828eca8819bd1bee582311cced0634e6103c50ceb44235cbc9d6dd8e33ec26d. 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/FRX991513514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28356af66eef56e83027d35c2ef41b650f28cf97d951476c0a10e9606f7b2690. 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/FRX991513529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7845f82d747dea1eafe2ce452fb3d04117f202f001a5e1a0cd14f475493684d7. 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/FRX991513517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb581e344de9c8ec592e52d72ebcf906e29a450357adb339495ac672f98007025. 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/FRX991513532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae84d9a04a4dc010529ad8a9211af4c31967968ed0411fed6e820cb24272549f. 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/FRX991513534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8950dcd851d6af9a52f6900be23f06fb828342097259f9d1f958e0bc0850e308. 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/FRX991513523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5529a59dbc4d8f2491389012dcdef6640cb844d87666ddc348850b603d9f3e9. 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/FRX991513538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4664b1f3d1bd6381f4425713198be82131fe7d6938adf541f9ae03bc1dcb31ec. 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/FRX991513539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8126628ec07aa787ca1dce1cbcafee0e3450daac0540905fdc3e08a1dd1fcc78. 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/FRX991513525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dc8938749a5cc57d160dccbcc132720a03fb2da8709f12dcb607ccdb42101f. 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/FRX991513540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c4afa43946cbabb79a4e39568695442d5a4e30c69f0dc3c7f208a014153e60. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX991513526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e05e27eb5d623e5009a6b866ee7bf476971f7b4d7257065759bfbadd03ab07. 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/FRX991513527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7a1ed786bc62a499234dda9e475cffe72d66a82a8a877fa4dbd5927c60f0df. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FRX991513528.
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 0x0dd412ceff9742ff2d32a1a62b88944f2baf5fa0eacb49b216b73d3fe163abd2. 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/FRX991513515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667f9f5e47c682d75d62fb4ce0c7fc4559ee10468e1f84efa62eee08abfbba0e. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/FRX991513516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4dd7f5960ccc3d6934b0e49fb2fc4dc04507f68b0d76e79f8983f3f79f8f18. 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/FRX991513531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70178f0abb9fe56953b949f53d9ae748176b330067bca8357cf811f19a17763. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/FRX991513518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b18be051080107b866c550865a8c08c44f109dce303ecd7c3e66361c86159ec. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/FRX991513533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2c7219641a0207f55ca0b73aa924ec0585fcdb32338285332f6a712d74f85a. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/FRX991513519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc2331fb8caf29721249b38ead1d232442fa52637485f90af2c2422e954c94c. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/FRX991513520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26921f9b2f4d3b5107713affe85353908e966c79515dc2d2eb11ee5c5aaf9954. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/FRX991513521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79541cd3fc69c1f2cf56657dd08e66d4e718fd27f4f7e643a0e8edcdb334082b. 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/FRX991513522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973b6b54f3751056b1b3be63351897beb9019c713414f5dc2a04461607e62843. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/FRX991513524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4041c7ef00a9c2a4372cc4c9812b20d46c9e87e09ee841d5aab444977c8f19cd. 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/FRX871587375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e94e6efc8b6ec16103a20be97c8a21524123a425100549bc11ca46cc481f2f7. 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/FRX871587378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369955a78cb5a083e9c42308db50828a9451a1ad6b0494c8d37925b23aa4f6c3. 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/FRX871587379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf33541a38aad28750667978c1b4e24ecc1738e1eb49fe426eae378f50c05c30. 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/FRX871587380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a92518d856d00ac9ec23ae98d9dd5f1dc8f8157cc5a2f4a50c70a0877f67360. 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/FRX871587383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c91d6207e990536dd701f0b476eb99184ef5c7867cf932c7d1027b2dd02da3. 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/FRX871587384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084392d8d68908e80b3777691cfb73be367bb9a144157efa72a3eace5cb7d4fb. 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/FRX871587385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5f34bcf5b50dfa63c04bc52fbaf0dc4b145d1643ff836a61b57fe189d0a9e4. 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/FRX871587386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548c381504a86b5347f309ca6c5f9529f9eef3c8f0d81561aad97358db43192a. 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/FRX871587387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e547129168a99ae55131fe107beed6be28a629ad107e66f02e75e2908efdcc6. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/FRX871587390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6bcfab860a60ecfd2237907d54d0273b3baedf895e6d069130d3dfcb315cbd. 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/FRX871587391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e12fd09317080e787bf4b608a801a48ecc8bb435eec6660dfba1b2d325f55b3. 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/FRX871588585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531a75c8760b80324a4b2fd0cefa08028bd10beed40479e41ba91033861ced58. 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/FRX871588586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27767c9ad0ab96aefef4cdc57796c586dac09c11f8bab7896d938934c7ba423. 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/FRX871588587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70242ab838a6be99ee8bfbdc51fb13316d2e47ad3cb1b63699cb943b47758420. 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/FRX871588595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035325df1ae9c7cb4741ce8f8ba9a7769d99fd8da277ab5556ad2292d8b79e56. 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/FRX871588596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82425f5c4f56f751125fbd490cc6d5b562462b0372daa52d917e77be6b073f16. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FRX871588599.