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 0xbac3b5f525f4dcce5c2503f6b044dfa6329ad9f3fd3adc471cf2faf128721f36. 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/752ca7ac-042a-433a-9831-e161cf70d02d.json and https://artists.proofprofile.net/proofs/artist/752ca7ac-042a-433a-9831-e161cf70d02d.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 0xc2cd60ff4fa7eef117ee8e9fc554fe8976a08977d61512457c34fa6553177416. 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/DET512404003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38f63d2912306aa199a97869b3b9a48244b87834764431e75bb0a5efe2a9e08. 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/DET512404008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f5d825f99b41a4f8234c3a2f46ca22ead8cfd84bc514bd420055155dadc060. 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/DET512404011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09efe4698162b96d0181335b5cfa82c12bb9422fdbaad4ec82877a83de9d0a71. 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/DET512404012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68ed27a830777caaebe0b10f22418b5176a87e4172002972c89697096cd76bc. 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/DET512404001.
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 0x7e698efa2be1d2d5a0def222f1da9a2ae11c58dbfab60840a358897e17ae5abb. 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/DET512404002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead3cc0b87dfc9ba02801b3986018bdb3fd964921b32f794dd4a84087d588478. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/DET512404004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6099fcf6f34b0bff95254dce3d65287d524cbd90a51a8f4cdbd5543d291c84. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DET512404005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920b8a966c5ad706146f20537a0bbd8147c9bde58565c4d2550aa815d2e86c80. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DET512404006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad489c21c76a0e123fd52a02f3aef950f3de5075274245d6092f554d13482e7. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/DET512404007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba7011a384b71d07c3be92933527a6d6bf4cd805a47631fed7536b540fdbf5d. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/DET512404009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19ac5176c5953132f8b9177d8c3d902a8fcf4face4767654b1f97497bbade8f. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/DET512404010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994664eb4efc6ded406d56bfb2d6eeb6298cbd1c48d8d860fed5dcfa0917a005. 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/DET511711002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25221db6a1205f33878f3643ff88548c9504cd73e8065b658b3489f09e747bfe. 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/DET511711011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933512a689736c65c99bca5b56cf1ec51c988f4b22b4506914e166f91af90346. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DET511510002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d6579ce1561270c692ff66a7d0375096b11c6640dcdf3827332d872371c631. 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/DET511510004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc505c88243ce91bfe6d60ee57657b8d848e01b4e325dd4c095c53a072d6865b1. 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/DET511510011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0dd07e649cddbd053b48a336b789cfcd9702bfc81f86fd61845e0715e7e74f. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DET511510001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e3072a39b81a347f12f0ed05d734738e348d41ba79c79d37243525680bed9f. 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/DET511510003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47b6ef78cf8eb7ae60f98e76e29372e130a95c8f1f677dde0ecbb5bbca99e37. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/DET511510006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4ce1c8bb8cefb0dcb09b789421ff80be7cf58efeb1ed296655f2e85ca8a394. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DET511510007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840d14a38ca49b78e995f174412667ab010b61e807004577dcda909f63f55983. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/DET511510010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093c46dbeaa0ee904d199a0f31182748bb4e823bd96e11825c652ba0fc087d1e. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DET511510013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18e9428a7931fb5dc7ccc96166e73d91fd3b5c9f69a647a22d8c44445859b9d. 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/DET511304008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b394d121f2149491d6867bc2674ef363291f9eaa6c182cdf2891d935f3dba8b. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DET511304003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09aaeaa70ee14d817b2a24cd52ccfa1d48e8022479535e925fc799129e59735a. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/DET511304009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a6b94bf4ae30c8ef4ecc04c7b6f148e402170368ef19bdad33d1dcc3162965. 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/DEE840809150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341008f9e166dda58a750d5d3d7f0512a86a68d231605669a663866aa0c4010c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:52:14Z), 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/DEE840809170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4e575276fe0e8e85bc371a90b05f23665bc00b3da9365c647c558ee517dbca. 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/DEE840809190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5c5535b18516a5e76e6dafbddeb39d6295b9a828425ae537a1bdff655b09c5. 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/DEE840809230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f56ffcfeac49ead9c22884c14f8deb0f9e51c8c68b898aec7f659ff7f3a130a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEE840809250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d9e9befcbb5bb64f4ae7b1638e6a50779052222d8da86cd86b92ae90b9be64. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEE840809130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0d11d6cc8db109142835386ee392be43d44afff72281301e0b60f9313e2390. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEE840809180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a7a48cad0966dbccc23fa451d6613f3e0491fb21d6bd2f2d8abc33a4c2506b. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/DEE840809210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7983655618253102e1dcfa903e142d5c315cb8696fe6da5203c774e4e73ee7. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/DEE840809240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88dddf6ce3245ce3d26f449e2a7dae543c495ab5687459b8e4039fef581c3bc. 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/DEE841111290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc867b132a4a75e1ce1b1c4d95d25e736e7d79c01a6dec53729f6469bdf51465c. 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/DEE841111310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ce77ddbcd9e18e25e2d00e1b07f83ededf74a4caa96d39232d15ed678de164. 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/DEE841111330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac90dc70a20c310067d7cc83cf55df612ad3d59e65ee72f1c95be9691a62360. 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/DEE841111360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d1e3fca3321b38540dad3db1133bbe62e8ae1251bd78b34efcfaed685844c2. 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/DEKM61101803.