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 0xcfd7403bc0e91d9151650b5064e0f0b58a5475b7a8e21758b83e1f19d302b5d3. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb8c4f57-25f5-43ec-8cc4-e4fd5bdca451.json and https://artists.proofprofile.net/proofs/artist/eb8c4f57-25f5-43ec-8cc4-e4fd5bdca451.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 0x1abf3a7d1fb36e6ac6b7e8f2b10b6f376a9d517d6a0527adc38ea5accff650d1. 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/GBLFP2410225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6455b5f642126168b04b26dc7f56e3fd1a84806c67a6dff4ecad4753a6a090a3. 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/GBLFP2410227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88acb136e1ce3e060b3699e78e09a4ab823d38e30f40b1abc3c3ac1888af0648. 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/GBLFP2410230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e2565c043226c5d81a99a75203065b70dc9647235a0df0ea50050784c406b0. 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/GBLFP2410231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d1c0150e465e015c8c16a12612ea49f262d7494bac17aed5416871e0628d5f. 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/GBLFP2410234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b0a3c361d6c61759ed1d43b6fcd1c3db66351668999df00f82235b7b20e4a5. 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/GBLFP2410226.
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 0xe7e7868ba9e50dcd84c72a93b0a8f328b9a5a3053da954010c6fdfdc6fadb19f. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/GBLFP2410228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520f28ecf738e3de539e4f677fc273cddee4ea95b4223405dfdaad57d92c9c36. 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/GBLFP2410229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccaed9ef5995d9b1ebf47f6a37639d7b74763cd5b2c001f4ddd820ee4123fc6. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBLFP2410233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861a70f2939f61b0f7e94a370a2e010359171be613c1e13f734e1871629f79d3. 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/NL8RL2327770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9095b2ffc01ceb66dc3f6b39804979c375a21ee40e34b478bd4f6d493a7d77e6. 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/TCAGT2360490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82acd892d50f21a6b399688858e37b50af05fb0304a6f4d81a39f556a66a9722. 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/TCAGT2360497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d9407c10f20c0872c461a5ec207b1a8be2ed698ebb2c9d00a9a9d947db1cd6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:09:47Z), 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/TCAGT2360502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f1ac2fda7aad1f7093cccddcca185c1003cda32a7b42d799f3eaa7961ff45f. 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/TCAGT2360505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2db9a8e530ccbb5a8607fe404a3c1f035af51d18c62771df4e057f59f6ba9c. 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/TCAGT2360507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea6d56834220d128cda58c4f3e192ea1fd25f15ddf12531c1c302c941f8cb39. 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/TCAGT2360509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04681b92ceef8d5ece049be7965cedba36445f8308c3fd4073888d423254c497. 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/TCAGT2360513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71faa6c16d4f6762388348d0db1d98b5a1c7279d78360654b6c456c69939210. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/TCAGT2360494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ed415abd49403697d6ac3a7a44dfe14f7d7f9e88895afb8d30f8072fb52576. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/TCAGT2360496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887e5aba00e3b0c0c4faa922348b45b223094a6b3c323b9e8fef90cb3761bbc5. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/TCAGT2360503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa4df5585aff9d9e66f6571ad316220f659d9b4e96ee2eb35386dd5243aa5c5. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/TCAGT2360504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0202e0f0003290367826f89d10c1f0032ce5d8808d243999bdff6f670a0c3fbe. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TCAGT2360510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1c24ab641126771a666d41bf94dd13f9e99af903a8a0bbafce4a2d120a2232. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/TCAGT2360511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1f5cc5e1be248a3f892b76c88e23fd5958e7baceacfd979ffdce6f1367edac. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/TCAGT2360514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ab6a4837b5f09e50158e6279703297b9c1370bc405b8d8df2a7606b5d7cc83. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCAGT2360515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b6a82d3c672824cec4d156ae01ce55751c4083198fafc92cd0f948436cf946. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCAGT2360516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f1b3bb73fd1ef7ef388061924f2dc15df063716de3b31e25058bb71076284a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TCAGT2360518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9190e95a7158cd4f2b0dda3e947399ea871d73341d1dd9687a003c43a483382f. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/TCAGT2360519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9e5a3600c8b00b065041dfb7b4f98b07e75d2aa58b9d8a0f0536452697a7c6. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/TCAGT2360521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ce360495347dc96474c648a2db1ba9b12d50dd130fb8934366a005e65a9ea9. 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/TCAGT2360522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1289737e59390cc6d8a8d88d5ef867e87d9278d10c6a7b3cf5750d19eacf9ec. 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/TCAGP2231566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a39fcde8af23b0d3ae3e6db390b2ad1533ee02807863eb2abbda595dfbd1454. 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/GBMA22488578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726257791acb8c68667bfdc7db2fbde34666a18d8ed24522709885dfd6264fb4. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/GBMA22488576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a03c902b613e3630fd3294cc4b9641039ef7bd67b7c8707d3d2f66f8f8610d. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/GBMA22488577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b953d44514b015979dfec6aca464694279c88d7d29c8b8a03091034b97f9394. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBMA22488579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed03d3286d370f8b0e57020ace47415a78087c0261e79848227c9b2b761bffe2. 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/TCAGP2258000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1aa393b545ad43de32d5f2dcc2298b6411f5244477e25814d12e88ab3f3c9e7. 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/TCAGP2231301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66147c1505a359627f118bd3a65f51ba819f91e5fdf93c9530f0b18b2dbb6db. 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/TCAGP2231218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796e437ed5cef9e7c6ead9920fd185bf2c957634e049aebad21b7e0ec29f98f9. 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/TCAGP2231456.