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 0xcfc2af67c5315a4bb29bfe9f1c3f3b8a4c56103c80ceb84d9626d461681591ea. 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/d23a6ddc-af47-42de-b3b1-77c4c287e431.json and https://artists.proofprofile.net/proofs/artist/d23a6ddc-af47-42de-b3b1-77c4c287e431.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 0x46c9b5f8a10a6ad20a7e8fbf1e2814aae23d2ba4d8c1fc28b3f853400bc0d6d4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US3DF2412748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0f3cdc8a1f9ed2ebec0abba8e00593968b723062188ea95c5b845e63cfe202. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US3DF2412749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41440b9499dd8d49dce38dc05063bddf553773a82acf184430cbe405271331d0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US3DF2412751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5c1110eb6a6e51e4d96bb4b56e663c86beee644f77ef73ad267c5ac65a983a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US3DF2412750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c133cb7a0782e1ac24d863c0d0ff237d8cacae051c58e5971ddd1ec73a09c53. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US3DF2412752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb26db0ea70701b62dfa56c232e5f7cfdd320345a438e93dfc305fbc21f7d37. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US3DF2412753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a3ddc45dc2a94b6077278f7a3ac7e3b332e21bf71b96d6a25424c5447ddd45. 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/US3DF2412754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd06a859a01cb1a15abc91984c70a34b4c8fd65e62236c8932084c97c700ac6. 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/US3DF2412755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadac4da824f18ae395f79b42742aa95d61d9a5b50dadd56d7b0e839c6d05e521. 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/QMANG2234418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054d49661bb7ac72b7cc030cb868bc7f8b6461065417745a70195f3a43a72a67. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMANG2234419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bcbcc2eefe96b8a930e00add1e3cb53a2bed6eaca5e30d115fb2d128760639. 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/QMANG2234422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd297e19828d0ee9795cef707a7d07b65120ae0c77c84a52759721e3e9652c7. 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/QMANG2234425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a2f3e1fa6dd3132ef06dcf577db3b211a0612fb7ca1ac24945a079b15ea5ac. 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/QMANG2234427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ea0a52f26a9c74ce798890ef293f649bbec2451488bc64de0a6a0ad3773e72. 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/QMANG2234428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead75cadf3bf1a9c0d546e371046bf9edebed2a79851eaed157463954b6e8820. 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/QMANG2234431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e9cfaf150069eee9112fc48e415a3fca74ed9c936c70818d54109db4438ed7. 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/QMANG2234433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c0348127e483e5d96a29d7dc9086fd94769a08b528c8aa2a0f26b7b3e0ae3f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMANG2234438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472b8cd9b84953958ed77faae56e343cf1047aa1f7402d83d317f13a1ba92ead. 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/QMANG2234454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efa8a8b2d44addff8f440b6307821bb22a406fe619617a0f7815c5583b956ed. 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/QM3DF2289066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa165151cc4afca0bb8c8abfc07283a4adaa74f494e36c05e950ab6390ad4fcdd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM3DF2289067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafcaec3ff91acb7faa9a80425bb4812042e81c31b7495174c15ee08223820f60. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM3DF2289068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdac52f29830e471c8cba815ebcc67b487bbb21fd33b532898dd83ed531dfcc7. 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/QM3DF2289069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a23957051adefcbaafe1c560644701221427437d8f8be598996d2cd769abf81. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM3DF2289071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a9f3a3c02020327aaeafc8ec83e0cc482d1fe3a62142313ee82d0914e53c05. 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/QM3DF2289073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1047b87e5001de5b160910cc0ac99da07baf6fce828de81eea39b0f2eb958745. 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/QM3DF2289074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cf33d2cd47f857ce2c7d630fef96a70efaa7597907a12a37ec1a3f9a546b32. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM3DF2289075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fe5576979365665e5c53b8642d98cac7e3f0fa268810a0f7c53fba414c9946. 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/QM3DF2289076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1389b251becd513da400400d51270df862251b15c8829e18190db25a3dfc71. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM3DF2289077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3264cf0b66820c4b25034e5de531ee3b80e77842a1b9eaddcc441f7d87444bd4. 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/QM3DF2289078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8093232defeb102fb3145f91d8b64becaebdf0ceb10016c2420294f21af1ca2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM3DF2289079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b469bd4a14c0ec64bb756c78b8b3ec4304fb400ef8d107242e0a3565ba1776. 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/QM3DF2289082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0714c2f68c4c31d49abe3cc74fc8a5cddec5a7f4a4e26e1ff205631791c5eaf2. 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/QZTB52200926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705da46d31d8df5e140cf58f4c5261c60662e17b4252c48dd0290e8797f432e8. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZTB42202256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9361371ef5d1020d63b361b7814a9c57aeb9b9c410cf67c04b2dd9466abc807c. 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/DEH742431749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154a31b335dc745c4801e97ad6c7a6fe69ae6e965205f589d87ee6cd3abc3f24. 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/DEH742430237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c76938271fb770235931c509ad0d450c55397ba2f6919e9b8871399d6dbf01d. 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/US3DF2475182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe8a1d40f155647e248f61ff2172b0db4da2ca932d1529e88562848a7a0ab12. 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/FXQ892400129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326cf155baa8cd3567cf5aa1407326a877bc724081e80f8d3e0cd6f25065ab0d. 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/FRX452420244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad86ad9e78b7ad427b5e2e461d364a47f9d7212e7f5ff9bb9c9e3fa54c0b17e. 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/US3DF2449285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a7269a0f035fa30dd4e934f41c6d9cb8a7d3157341840b1748f5b03488e7fc. 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/US3DF2438032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77e5dc3a0afe54b0cfed733aa706885be62f883f8b341163cf7b8a1395ef48e. 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/US3DF2409531.