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 0x0cf6eb8935cb2dcc4263227e5838e110d9ea1576ab376fbc77ee487a3b5dab59. 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/1e368b47-9f64-4551-902c-ba5ec843578e.json and https://artists.proofprofile.net/proofs/artist/1e368b47-9f64-4551-902c-ba5ec843578e.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 0xaa9006f0a25324ce3a16eff5241147c3f6e17bffe9e65dd7bedf0d9f4787671b. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/HKG732276370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670f4fd0674736822d4319ec46510a05dc84dc8719345ea4ba3fb1f6ca940db8. 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/HKG732276351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cddb550129202dec90e9cf25a5507d64a36a9788d9763278c9dc436d823ab5. 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/HKG732276352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a33612626a9449f453e711d2da0b975a4fae5cd880ff3b271bb0006faaa54e. 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/HKG732276356.
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 0x27cce78a946d1be90f2e0a9d72a8a19ccffb06de6ef650c7594dc508a5da5b27. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/FR2X41868432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e63013c10dd5fcacb66b48f3048d8566fced6282a5ef001f4f9fac607454f1. 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/FR2X41868434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece787d539c838f84cb73560e8fa4d90036ee0ae566dd7183774f64041aa769c. 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/FR2X41868435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3481ba425f32f558b004e47caec67b6e832cb839451d1999f528fd91e4b378. 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/FR2X41868436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d92cfd86eb1a9a11c695f862e8f0615e3bc4b742694318c54b35741737d02e0. 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/FR2X41868437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d3a576fb893c7896e1d771f6e3888f5fbee414de40ddf65dd435a707a5e1f1. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/FR2X41868430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb180df0029fd9f1d47d0ac10c59b9b091df284704d0f895f3e8fdb6a115c77. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FR2X41868431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7993f1c85930433fb37d260378712e9ea9627430c6ece67422cad98553602d6. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/FR2X41868438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0089efaf67ecfa2979a47d0e1905ea63aa474ce78c7c6df84044f47046dc1d2b. 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/HKG732466390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c597f9dcdb7487f030cce1c195e7ba5842ac49954b51de3877283957f456f4. 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/DGA0L2461665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328978f5bb95b79925d83eccd87c2e5468ced3703ee00777e4ac0f5471166cbb. 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/HKG732457121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b99ab0935f0726525dcb4e2b75062ba2f27d817860cb5d3007f6a10b6fd240. 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/DGA082444165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f47556eb9ad05e04a528cc9454024c7d1998e3771f67296584dc600956f408. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/HKG732428474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa825e6bfcbea7c7d216225f187e27db85fd31a0ef7063bcc54bc1908b13029ff. 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/DGA062479524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef30b596d3e14c93b364a77e23e209764e22a509bdc87800001ca68e5275991. 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/FRX452448517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d21f64db6b36544af3c5cb972c3fd4fa7147f6e4885f18b454de7d73f25f3e9. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/FRX452448521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea5ebc0cbd3bc83cd5d7fe9d1f4e8a701b8f8df83027509d55917f68dce4f0a. 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/FRX762449420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8f6c7cd1fb2f81650bbed47a598303ecf782e58ef46950da858b147bf32ca9. 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/FRX762431388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e9f0d52d11b4d101010b6026fd6b17c33a8397847e161877f50561c713eec6. 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/FRX452419642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7269ee7d819df225c5b1458afea9e4f6279bfabc34da5a5bf87d37bbf5ba2f. 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/HKG731682362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc8e246f75e1ada0c8b0cee68f619c90d0250ad900cea1bff6176eb649e592b. 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/HKG731682296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6cc441a4688cd28b1f5840bf9eb929d2787f908e8867e860b64556c70b79423. 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/HKG731681651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60986d541ed79acf31fe36b5d945a6a9f9db184201b44d13fa456d0b7e7c236d. 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/FR2X42477346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c68e3fa9d48d779044310287f48f36122ae1012b0685f7e5560678987bdb114. 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/HKG731676072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63251f8b7d623c94ebac2a6d76ef74b15c719cfba9ce179e9feae443512a0bef. 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/FR2X42457730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23d115b806a876529abb958a1b9b1a4f42c0a8387f4db3aac6e180461d41af0. 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/HKG731675287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70bc2c30265fa480bef9ea4ff5d0494be84ef2c0549fbdd2fa4cc4453bcc236. 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/HKG732485514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26f68de10ed5dba6877ef74689b9ac543bd5a31d95646e9d9ea8c8448249ad7. 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/HKG732487114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d5b0d6a1a0ea83a40f0c9379ff43e4a1ec460cdf10638b079d5b7a48b5f79d. 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/HKG732481445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d345c687dcb4e727f381cf0d7ecf57a66d03b4518038876a1c5e400b54e9aa4. 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/DGA0R2454540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125629ac259c3d410d1d56440de5d8ac56528d78308521c69e39c5c6fbda2af2. 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/HKG731674850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe51e5ef31fefea9accfd39c4352e9ee56a10eeedf1708156cb976790326e87. 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/HKG732026909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680f5044816420aca54ec0dac77e212431d983a5d897967cfc161baac567973f. 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/HKG732026910.