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 0xe3aebab2cb8580ee602afa56ae49ebf7516b25cfb993afd99723f6deddb09ea4. 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/f29f5302-d725-458b-8dab-45883bcdd3b6.json and https://artists.proofprofile.net/proofs/artist/f29f5302-d725-458b-8dab-45883bcdd3b6.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 0xb9ddf7b02ce48b214528b15f4586f866319836b3fb8ee476d3161fd9839434c8. 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/TCAFX2124131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e57766374fb3a4050e3d12a43908aebcb2c90453a58577c473f36431338105. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM7282063970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229ecf265940782bf755b793273142f0abf81a96f6d39b7b70f43cb5c7ba9a34. 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/QM6P41942109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7e4a1e69217467b3ad18639e4ae43c532ae2120757fb264edd9a56d2316ae0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USANG2295829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa858dff770ebbcb2bd834f8a3cc4d9f395cf054f8cdbf92501444d9df8d0b1. 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/QM3DF2203019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaee72ffc8ac1f7bbb8e9842369909d4931fcf1be46cbde32457bd2fd191707d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:21:44Z), 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/QM3DF2203023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19bbaade00408251f78aa3c9c9e86df3c4760240ef229ae48c8a0a640d0a3c9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM3DF2202661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a198d6efc482318945f485755159d90e155a7ff0205a8d2716d0de1c4f25c66. 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/USCG61400051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13135a5fe058442ce436c43521344ec300a8e4fd6ba80d6ccde37a94591e8283. 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/USCG61400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d004c84d50a5e10f905b7429f05a4444a9b401c6fce894ad1f4f94b22d115d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USCG60851041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300def28349cb528b6161c2c173968d775ab56cca2518b93b3874f388970020a. 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/USCG60851046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf326eee9a6e90fd343e5b6449ca846c0228b45d18555b1f223cff74e411c3f20. 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/QZ2J21507979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fcaf067d979048bbefc205e15440895443e59c902c5c75a3e96db94976d9afd. 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/QZTB32364026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd16d8e05cbe5da3572749f0cb4d74bf72fc4e34f28b719d9a99734e6531eb2. 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/USA2P2344310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19bbaade00408251f78aa3c9c9e86df3c4760240ef229ae48c8a0a640d0a3c9. 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/QM3DF2202661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcbc6905a049984e98f472a22e40d6ccd038d40283f465af47c26fd950c5044. 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/QZ2J21505217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f48658b09a58efe99915cf4f2ec9889343daadf02ce3e8971ce7e7679014a01. 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/QZS7J2148106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e8b9eb7a8e551be6b3935705612da22b88531690010f0689015f88805f9c17. 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/QZ2J21502818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13939a0a9b064c7af5bd7cbe5a7655cf9996ac05c270b0fa2972cdb9e2193b22. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM6MZ1922257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229ecf265940782bf755b793273142f0abf81a96f6d39b7b70f43cb5c7ba9a34. 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/QM6P41942109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e57766374fb3a4050e3d12a43908aebcb2c90453a58577c473f36431338105. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM7282063970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fd5236e412e97b710aa48881a5caa4154ce17a2a8dcc429d4ecf52f2c29e16. 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/USANG2478553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd456a23f1fd48d97a14d7948d2cd2ac55748033d9b794cf42d1a68981b49aed3. 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/QZTVM2464729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342dfba6adbb9201a3bfc69093930085e81287c92ab542101cd598c1b7a2e41b. 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/QZ2J21502598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff240b2ad4fe0386c74c917ef71c15ddbd4bea48555f2a07d497feaafcfc6fa. 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/QZNJY2237263.