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 0x35ca09bc5d4b0393916d77c1435f77c05065bf9d33e6cb09bbb6c6f24bb8bd7b. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/10122d86-0f41-4e16-a3c3-8b86ad553867.json and https://artists.proofprofile.net/proofs/artist/10122d86-0f41-4e16-a3c3-8b86ad553867.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 0xe38f029dcd00fc58b5281e59795d1f38fab4ed158034291bcd8fe9c52660f5d4. 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/GBUM71302420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8b1b46e522f6660579c2fbb99a43dea823db626c2af71f41700cff96a04a61. 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/USYFZ1449307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5758a600ad208700f11b0dbb8b9fa43818cea4a0acdf67229a03e12529d2d3f9. 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/USUM71013466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afcf865e97d45750ece8f7b5871c40ee6f4ae979c7244e4d4496dd91ae20729. 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/USYFZ1339702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f54c72ede64ccd5c8bc8be871062a89d41ba5f69483abd04dcc99182594888. 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/USUM71507643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa3aa985d29c5dd73533448780055b3266ade98950b18e1ccf18ad885148500. 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/USYFZ1449301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d89c2416a882e59d4c5552335f8d29b3053528d9db587ff2be4a6708b179a8. 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/USYFZ1447405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfb074212ffa57e8baa2669c8b711370b97788fd3c483bf16aeecd9e3ea8fd9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US4LA0715701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e69239ceba8e23fe0067bd4d51d8b6b19f11c292e5cb05f68b26c4735300856. 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/US4LA0715705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde276c422e349ed87875c741514d08ed1f1a5197546ace7671b93df89c087f08. 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/US4LA0715706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563e4e659e2ae2d44c917945e9143bb99afbd0fe1f2e2189a5106adea50b0e0f. 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/US4LA0715708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbe133406447fabc2bc5c967be19c8bcb38c80b80bf480973a5fcdd8c6500e3. 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/US4LA0715711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b5807db4f7bb0a07cae52afc2391cc6e3b3fed5e89d0849caa60a8b65432d2. 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/US4LA0715702.
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 0xd83888a645bcd6216bcabf21430b4a18e90ae79658754f08509f0bcad693781c. 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/US4LA0715703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7781fe4f554b1791990bb85f13232df475070545b69987ea8e6836a7f293f40c. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/US4LA0715704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b20171216edbc76afb64a8d05f676b3d83f979ad55cce242f88674dbf06038a. 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/US4LA0715707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c17e1e34164d479f73271813b1019c7d43b8410a835d82572501239ebc8e42. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/US4LA0715709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58516a1b1301f4304fa7533381b1d0f08cd4691368d9f65e9a590dc153d49307. 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/US4LA0715710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f13ccde1f412fc49823e9333dbec6963973b04b359abbd8e39ab41e61575af0. 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/US4E40415102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6eb2c0eba2d1b1ba27f39c9753e2afbfcb4c6c9f7ce70fb37ba2f4905da04df. 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/US4E40415103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab34d8aa46d4c07b516877bc1716199f65867b23d02da785464d439edf054826. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US4E40415105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b52434a6e712be1820a2fa78f46d4e0972519765fd05869a12efa403389de0a. 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/US4E40415108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64da62b84a041f92dd1245cf0e040197602e767c013b5b2436e10e09748cae7c. 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/US4E40415112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b81c410687992b82d984ef9b205fa8409cb1dc62bbd00724c5162580e3496c. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/US4E40415109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b4d2198963f807fe4d6710414316318b35e779ddf1eb894958d65981b78d0b. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/US4E40415101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cda0fdc4103c910ffe3525eb2c0cb832a9e88260ece8ac334e8b8e5fe805884. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/US4E40415104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266d1fe416a1fd8262c8aaef058e2e6b42f50cdd96173ce26855bcb0619ab020. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/US4E40415106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c159e529e42c258625a9ccada26d2f5cd551a4d6a22cb5a410a12681eadc59. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/US4E40415107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcaf161a3e4030477a57f778fd1244daf5406c67b981402ef7b8694d8e6f0c7. 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/US4E40415110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb995dd1d44e16cee9b99df1a99a623dab2cd004e4b3769d214ddebd5acc4e47f. 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/US4E40415111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a33e53fd926731925fd7571b32732e2c712fcf691e13600728bec4e1e40467. 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/QM4TW2580058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13aaac92450edfafd95656b0d3945684488218fa7da3c50c04e79299d9777607. 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/QM4TW2580059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf53ce6a5d3ebc0567f400df915b8c1ee43d70ab7a8fa407d0fc019b6e0724a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM4TW2580060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2349131ede95999755ebf4ef5e43ac2320312e5504baa725846c00f8f34110b7. 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/QM4TW2580061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f250af9f3d5fe72bc72ba0e9378a01260fbeb0f106bdcdc78dfd12199f7073. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM4TW2580062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82499dc72b9dfeb572a0aaf1ac6d59895b059f6d296d07f84644474cb81feaf4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM4TW2580063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4be259bbdd89c84f24253ef8f87485465f99da5c1dcabce4921fe032e20e9c8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM4TW2580064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce18102d7ba53e240406fb3fe96524e27fb8237e0a5ab09240fe8c38eae3cf0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM4TW2580065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a8f8c846f616356ea66145b21b392ede4028bb2116e62b75db5fb211f2e965. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QM4TW2580066.