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 0xb852ec723c1219d44d247c8bd1ddb2da20be21f2ab5b3eec79ce493be2b1ad05. 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/fe66866c-afe1-45f7-8bb6-3d0725022b3f.json and https://artists.proofprofile.net/proofs/artist/fe66866c-afe1-45f7-8bb6-3d0725022b3f.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 0x8b7bc3cc636b7652fc4c386b438ad75ea403542c38f99ee1be58c7bb5f21734c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CAQ8S1625724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8c6c33ac7554c1637d8527cd239321b7f6f999f8921db1833858c265434629. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/CAQ8S1614239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dec609491316b281fa92d9eea84bdd51df0d084afd4882e3e4e8f88f60dc90e. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/CAQ8S1619369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7b4c73d46f63fb9985d7b9588b11243b097faf1e25c910b11716ea329a9f28. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/CAQ8S1614043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c28e13bcf9775b484aaafd82f69da91fe067cf1c4625b595f4e4958fba8607. 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/CAQ8S1614202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3f8f4211ffa4bba72301990cbd1d3a75f4f93d68da7ee4ca0d896942c61d0d. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/CAQ8S1614209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3e78698231863f32d6cd06c3fcc6ddeaaac63f759db04c9de9071253ac360f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/CAQ8S1614199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fe8492c6290779c46d8522dc43c73922f6fa855ccec30413396e5289d8ce25. 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/CAQ8S1614494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44499f484511188435c02a69d17100959e0bbcd205490bf57381680c210ddad. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/CAQ8S1617372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecca85fa8a0ad223e2dbc42439a7bd0b73dfd3f8ae430b0404bd22295df55b8. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/CAQ8S1617685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42e09f44da497f1f4b04123c419bab9cb616271569ff832811615b1d8c3b801. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/CAQ8S1617766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967c0b3f5d971b22bdbf5d485fef75e49dd1c97d61cf5defc3c08e419b79ccdd. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/CAQ8S1618269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b1957ceb1e3ba6bf9e6cf063ee5c7724a6b033c704a7a0680f5ab1106474d7. 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/CAQ8S1618641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f0b7d02f5fecfe6dd345bb1965d971b513b5c86005a728033641490c1de3e9. 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/CAQ8S1619143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97811d3ab6affc3b25365f5e74aa8f1a7207aa88542a51579c2aa731dde7dfe9. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/CAQ8S1619564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935e09b2705d80fa13dba0f5305ca5085c6369472cc7fc0c1098b792ac9fd77e. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/CAQ8S1620279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c09cf970ad0e1cce52a3ff38aace5d187afb26634ea4b14de858defbab5593. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CAQ8S1620396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e6b78193076ced012edc26fd032a6d82610845413ab1513ea6298f566ec780. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/CAQ8S1625734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dad22173eafe6fd00a7f9a0ea012a4f0f8f47025e002f47a1ac4cdd41ee86cf. 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/CAQ8S1620781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf223fc1cb74a80404c9ae690392c1c51b6922a203b2fd565a990b9d532974cea. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/CAQ8S1620790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989e7fdaf59166854d3099449306dd0c4a4d54187fbedabcf845796a40ec6364. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/CAQ8S1621483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261a4c7eddfcdc4ec92821b1f54dc44a9595a4d6d87a17aa5bac6087b6e0dd44. 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/CAQ8S1621764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c15c631801923b8bc2304e2581e296cc3632018a54d942a5b5148be5f18eb1. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/CAQ8S1622086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6945b063313cff4c173e8cdfa453710d8a26d37ec772e6d0a4681275663e5f6e. 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/CAQ8S1620715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3066d9f068e15470e4ab0c4b91900a8a6d79ef92068212f559b8eae0d4021845. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/CAQ8S1628183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc1f93785188801a8dcf49262935294aa073735d78fcb19864f4758d5c8539c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CAQ8S1630356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e49719696c8657a138dd303dfa76c4bce48c6ac19f4c1c634cf988dfea98bdb. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/CAQ8S1644677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed332694969a61e75bc4732a3c5a41c2607c8cf9d0c0c262830abf992c8bdf9b. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/CAQ8S1644891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadad02b19e4a29575147c69e23b0ba820bb4b7bb44ffc031bb125bbb06004f5f. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/CAQ8S1644992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd810b69f00bde3f29aafb915c702d8daeab7ad408a24f95f36342a842fdaa2c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/CAQ8S1646268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb178181e279ce4e116879cf642170fdf5d532248a6b271fee2524894630ae995. 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/CAQ8S1646576.