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 0x21cf58738ce608e4825a70e543174417011b2e9ad9a54952796092ad9d36c4bb. 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/6c17b269-d6e3-4508-a1c0-5d0a12666483.json and https://artists.proofprofile.net/proofs/artist/6c17b269-d6e3-4508-a1c0-5d0a12666483.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 0xd184ff67d4b54c7e3fba1ae0a4f3e129ca1d7aeaf7f85b95d22aca93a8c490eb. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:02:37Z), 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/NLD321500692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f5bdb8c910984e52f2d5dbaa5e4544d84d3514f2c364dc6cec3fc2aa4cb293. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLD321600755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579c0640e2fa8dcdaed72e96d28de74b73c2e812da401b0f508cccc3f3fc4bf4. 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/NLD321800315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ec4edca80b6b98cec56e080146762f998486ccf96be046e47b420d347426fd. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/NLD321800318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e8bd03391aad1f3916478c53ebae4e2f0ba364f9aa50be3b7089bf02888528. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLD321800319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd329ecd3cd383b92f629fda17b093a5cb14eca470f07e3e80e4482cf5ce354. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:15:02Z), 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/NLD321800322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80be64a94b3a86e58376b6a96cffeac3e4b2c190fcc4a1772f87a249fe0b812c. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:34:38Z), 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/NLD321800323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509541a9ba910c35b2a4e74ad44c2fa3d1ec02358c7657aa6c5a45349b47ae44. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/NLD321800324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b8700f4f194cdfd5e237baf551d89050adbb90c2b4dd5ec9f40015ad109d46. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/NLD321800325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0405db69130ef2f2051df34d142b2728f2e72151fe36c24546d06884cfd72e5c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/NLD321800326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269b0712ed8f8a9630429fd0b79cbf93c3aa2f2a6710c0ba877cd3469157c0f6. 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/NLD321800327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8989a400a1df1268952070114dfedb4bf8706aab29bcc3bd300c7b14ffb2e36e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLD321800328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be3c45b20579e35226fffa661b187803f1a5c5cecbad9f0f52cade363b03c10. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:00:16Z), 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/NLD321800331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038f21d76f78da50475b2b76b7341e396d4a876586ec1c44ad687a5801756cc5. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/NLD321800332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e8c0704e88f03ce476f4b5a183808cf6fc6eefa7e517cc829fb47829c8bb98. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/NLD322100072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b0fac55eded7924d2b7d0e7ae9775512f2d3e2ecb6841fea253be8689847b5. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/NLD322200144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb692ac0993c814ba673bf54689aa3be2c37837957b8d30670bcb831c8727916. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/NLD322200145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8760e7610dbef2e2778c72ee0db384bb65e1b019f1f5047e1e6693ed7735a2. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/NLD322200147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2da2b0309e4149aa252d96fa4c74808c0b54558f8a31ece90bdb56f02a6eb7. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/NLD322200148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24fc31f95898a7996afd22a518075f8e0316bd4a4e24ceb1ad033f2ff95eabd. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:31:52Z), 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/NLD322200149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0927cc8da46c8f8f084549099124418230dd0ea9d01c9fdcb1e0c29a5378fb. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/NLD322200150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd7d0f1f2f9d888b76f013237a88f37c7df3c3398715cdb842f9fdbaa24ee92. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:42:19Z), 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/NLD322200151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c4685bbf0e509542e52b30df3fa7f0de6d4af52bd851620b95c0cac8072ada. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:29:01Z), 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/NLD322200152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a26551b93fe80aeb91cfc801c7c144de60f4a1beb33544f8592548267a4760b. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/NLD322200153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2389194fc7ba87b5a903e1f3912a9818b04a14e79f559e24a3f506e773a84aa6. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:02:46Z), 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/NLD322200154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce5906295a568260407cd721b227b5b840391bc5417a7ddf66733c62978135b. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:30:29Z), 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/NLD322200156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1dc39a181781fb922de06eb916d1e31e772fd29c75e04f95baf647e84dc38a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/NLD322200157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543b09b97451878a989a1a93cc74a8d486508c5cdc7598bac15fc5ad877eb1af. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:06:14Z), 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/NLD322200160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37f88cedb149e993d7c7b904108ae0688afc7a3f793fd96e3824b47c5e7c4d8. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:59:02Z), 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/NLD322200161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc49cdcacf8c92c6ab22d478193821585c109ca2cf41c62eb756a0d9c3dd067. 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/NLD322200163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491c28e0db5a97d045f13238b7c6964ffab2b0e3132267391e1b89cf29a3597b. 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/NLD322200165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313489f356d6bdeaa483a877801ea886da843c3e3aa711c39b446b3c27625ba6. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:10:31Z), 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/QZFZ72592738.