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 0x47323afc6cf63c5044112ac9df1eb38eef0e39a75754b844692968241a5b5ccd. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/763f3abd-f081-49f4-8a95-f9bef680d89f.json and https://artists.proofprofile.net/proofs/artist/763f3abd-f081-49f4-8a95-f9bef680d89f.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 0x576db5aa6ba5558e1eafbffab323daee35357acde33d5b4710a61dffa07bee20. 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/HKG732411538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53f357bcb6d98382868bb824ba7256ddde3d7347054462fff0d4019e5900f4d. 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/FR10S2191712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448c527848f4fa55ae0fc7d3c12b936aa4ebc38714bea0132d6ac66c452c758a. 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/FR10S2191714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d132c654892b824b378bcf546fa9d9d69f6cf4700ceccf32a2be38fcb648a1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR10S2191716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbc31e8caa32f057c1a8f084c2bddb02c3e8b728c11c540dec1732cfa0f96a7. 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/FR10S2191717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb873e3b39380b40b63ba35880be079251a9b1b94e1148b4997259260f4e289e8. 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/FR10S2191718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9378062899152bec205e33e0341bde4ac4b9ab0de4bd88692fced8e766caef. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/FR10S2191715.
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 0x65955be1017e84af5c5944ff6c16af08648c7f37dc67836e34316b3c7b0aa9d1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR10S2191741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aec7227caae26cbae264cc1657d00b861ebbfd1f2c6991c272afa404f455698. 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/FR10S2191745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb502279c56f6635ac49d875b120703ec91e48b05500355e68e7bea5e3b4a9a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:56:42Z), 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/FR10S2191746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c31624933260cf6dac26d52eee5b8942c55736921d0c31efd59a7c8a14bc95. 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/FR10S2191747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdacb7cef2ae968c571651fe3786b322c84c1a9bb54f7b4a58336342e52cbb05. 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/FR10S2191748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6277c7cf9388a30e3f8d1769ecee4487e25c9f809cbb34ea2ffc392b66a6371. 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/FR10S2191749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26f6942c0706bb9529394927a804ee9f1cfbe6cf39f418c7c5733aa9730bc84. 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/FR10S2185419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f16de7358ee5ee36759be2e000e985ada792b5bbf762647fa6724a251f9f45. 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/FR10S2185431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ccfda92fc2077de6848ba5ca96fdf10f84bfbda7971f94c0fdd35098fa0da9. 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/FR10S2185094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ecd85dc9abac7273e3b5efd2df1aef34105da2dd5c3388a084b9b49648705b. 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/FR10S2185095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8c4551e52000c377c0446233a5c8d04850cc65c69507809f05001163d7b0b1. 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/FR10S2185096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6cc54a22ab70feb7125fb14c68337350e725da1dd57aeb1fc6d095710302cf4. 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/FR10S2185098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f7eb74673186a09348736f50303ebfc4da437039d69cfa0e6ca6f8d0bb4f7b. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/FR10S2185097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268d2dcf0842e11a1e919b458ae0ca5bfc1213fb7db892594056f1f6741e5c53. 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/FR10S2185058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef867cbbc8ef6164ee6bf394d5f61cd5cdb331c2ccb37f74a30e8e86318dfb22. 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/FR10S2185059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a511d026e8cbabc365dffa80cd5282f127044e2431dc36fc46f9e27e5844f2. 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/FR10S2185069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2063f1581fb0fe34aa99c3be2f16f346bc7183e8b4b780130dd5f14ee7b737. 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/FR10S2185073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8699297c48abc8c834c0a1d7b53ab5a2470bd739824374e0665f0cc2a020737b. 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/FR10S2185340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db9143c1474417c4161b3865445451e15eecac4d3a614944eeb820af29e323c. 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/FR10S2185341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab425162eb86f6e1a77f0619011ae237e55f2b0e5ea13391794ce481e885ef36. 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/FR10S2185343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7647bd74d296cd389e57935a2209b9db3b53c343bad33791b3cf358456fb84. 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/FR10S2185223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4a63339664f033ba4b3bebeae189cb0335a5c526fa9611a570066d8d952b39. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FR10S2185224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9854c98c0157b805f4acc29f877502aba7dff9ab61e055fc00cfea1ebfa9b0a. 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/FR10S2185226.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e4c87f4e9ac754edcad3bee2206e2c97a243283b5ea0c0de6c8cd0e26b6b3a. 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/FR10S2185246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a4d99a943917c30a480dc86a07a7ca9f837502705fa3f98983d9cb8d36a047. 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/FR10S2185247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649f551490c773c234359678e31af9969962f3f0e635483a7db847180be2cf3a. 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/FR10S2185369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2a9146a133043b5155df218be0d651c47c7ef1e30adbf732967e93a74e77cd. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FR10S2185367.