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 0xa073366a3c7a3c8f1a3cbb8607688b2efd76a6354c405a3bb4c3d775e17e7f58. 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/c9e12c19-8ebb-40f6-9633-f3a34b6fe8a7.json and https://artists.proofprofile.net/proofs/artist/c9e12c19-8ebb-40f6-9633-f3a34b6fe8a7.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 0x84762e009dfa9119cda563c5d8480ce7497f19e2cff02fadafdece7bf8439bb4. 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/FRX222000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10c09941bdbae749c382e95a68ccf68999b721e03b9ac52987ca57b820f76c4. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/FRX222000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6e43317f3dc27bb53b8bb3ca25bd7d3560af09337d66b8bc9a88f2e9d1cbb3. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/FRX222000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc791cfceca1fac56a59bf426687e619b79ac5cbd0bbf7d6bc450792f7548f0e5. 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/FRX222000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985c22f63f9838fa158488a546d664494d79da340e81cc10b2327c35e43d7595. 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/DEE862100995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45510a35ee590f61d190a6e82a7e2f66500a3e4ba43c040fb09eff2f78b8dd7f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FRX222100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc7a7edc0b951d2e2011e22d81b98c1ef3ee39aad8eea7ea23a5f7a27dccff3. 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/FRX222200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23496f3bb85d09b94758e9d2c18eef3025166273cb5e648271c78edddc2c6a4. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/FRX222200003.
Pavane in F-sharp Minor, op. 50 (Piano Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc744fc7d0e74441d4830cba0e69ff016b52e7a84c23e5da55e2685fda5d87dd9. 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/FRX222200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6738bd8a6c5ed211e8530b782012bd43ab70aabb55d843e260d336f905c07283. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/FRX222200002.
Peau d'âne (De Peau d'âne / From Donkey Skin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdace3903d85c8046cc0f1f69964c7c4027809433d041497f08d2e765cda12205. 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/FRX222300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76687cd7295e2ca3154f609f867e9a3615f5984c4de29d1ac12db3e6be6b7e2. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FRX222200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1570c6c7851cd81f71da87864c074d63c0ff8288292730521c9785ab88271be3. 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/FRX222300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dbe50f95b6e9a350f6ab24febd127200d14a06e65f2f1a55fdd426ae1de9e60. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRX222300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbb9f8f88b5d63acd1ab30c26953b4bf996eb8ed099f92b80fea031ec5b7ff6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRX222300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f971bba7e816acfeeeab6ae9ef845128a42d73bafba848b54c87d2b94313ab. 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/FRX222300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9188c24559dd93dc3ef946ae2073f5eb03faa3a81c0e72acf25806508dabfa. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/FRX222300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777ab31645751ecab6cf77f027353fa3e9fbd20981b96c6de8cef6e3c0dfa24f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/FRX222300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fbfab14d4a3a84d3ee569c385749f2f3768ca3d2a9f2b185c4588d09c9c446. 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/FRX222300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ef798fcf229a0d82ec4c875d5f5c1c5dc8821abe4daafb2970236fbcd8c8e1. 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/FRX222300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd604e1fdeabd84a05a2a78de12117c94570ed7e3452d4efe1aa5cef423889a3e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FRX222400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd604e1fdeabd84a05a2a78de12117c94570ed7e3452d4efe1aa5cef423889a3e. 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/FRX222400010.
Le Comte de Monte Cristo (Piano Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaff5112a19de313a3b09fc0e148091f7ed111e6921ee2e3fa4c05e6802b935f. 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/FRZ662407050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6697c1552f3d3603da951264b8f6e68eca6c3c1cc2ff6ffee69c9208ee4b39. 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/FRZ662407080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2820d3c1e29317810f399306cd7eccce46b312eb961e1565301874c03994d558. 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/FRZ662407090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af765beb641a1987671f97b334c62b05606707f2d27422bd283c297d3c81b95. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FRX222500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985c22f63f9838fa158488a546d664494d79da340e81cc10b2327c35e43d7595. 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/DEE862100995.