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 0x4bdf8b498e04932334792258a9e9dbad617e0eff0705e998f6e0d71524f89457. Chain 2 (Bitcoin): anchored in block 953991 (2026-06-16T18:47:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f339462-247c-4b75-b426-22872189e8a9.json and https://artists.proofprofile.net/proofs/artist/2f339462-247c-4b75-b426-22872189e8a9.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 0x9cd6e986ebad771c8fd7ddb4f2de57f4c4589fe586cd0212a8ca6e8caa43aa1d. 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/GBHWT0500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4ea93c0e1361abec8d9be837ad93371ac12879132276fde4421af16329bf83. 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/GBHWT0500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14ab4e10ea5cb004ac1fb0104ce0a881c389b773dd605f2718168c9e34f4de5. 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/GBHWT0500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdaa6abdd0c2c6d32eca3a6da6572d46f62433a7f745dedb4f7b051c703dd756. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GBHWT0500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5375d7507dbf5c1cf4e2567c5981b56153e6ec9f1b74b78fabc07b8a7f303fee. 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/GBHWT0500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb099d8869cff7275dc96165b6c32336ec8f3b420dffcf97d973683717f5cf9bc. 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/GBHWT0500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86750f77c1355e34bc91bc635c11c09763c0304311109a6b4d337f227f94f157. 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/GBHWT0500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1296bf6f24d337d1f71566b2fa1b945338676542c341ed1eafa22c9014563423. 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/GBHWT0500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb66d4fc2eb608770174a6297b4ced3d2106dc8af57999c7ad75391d1f4ce19. 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/GBHWT0500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4752e5ab5a984698c088aff94b07438cd1bd7f6a5cc09d0079fbbf3d63e265a. 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/GBHWT0500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a0d54a4d87f8494a55a3aaf7a2eb11c72b6aa46a88e35a68232eb2b8baca33. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/GBHWT0500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95110cf325c38a5801d892c01cec4c33a7807552e75cea5a48b3168a18e8eaff. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/GBHWT0500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe845d7f4a1c7babfdf9e38ba082f15a771784ced732d1501a305e8704c6da5e3. 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/GBHWT0500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371103c5b3d49897e4faf2e3b6f3e2f99ca7c4092183e25f9e61c1b469615083. 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/GBHWT0500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12eba2ae3eb19b2e1f451e0814f25188e8f43b4fcccaf3c53c8b590b4b42b1f5. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBHWT0500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df8f58af52d0c311ddb7b2e2e0aedd9230909395fc4209f89a660e7b7724ac5. 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/GBHWT0500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124c39da69fab21c0e69bf5a7714256f9029bf4117525cb76a13606945fe1cc9. 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/GBHWT0500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b42c539f172b589789fe9e955a9ab9c6f04304136ef9df136698a9c524af54. 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/GBHWT0500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9613e8918594157abb495d3159bae52ad0cba16b7fa256604bf4831540d9616. 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/GBHWT0500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fcc48276aaef3481647af9677f9eb5e81707ea4b25bbb85735ad6008c10513a. 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/NLRD51412682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbb1483efaf90a98e63eb81743cef851e99de3f2fa70459f633684ea129e336. 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/GBG5X1224301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe990499f2a02f429d876506de4404ac8f53cbdb38d817b534afa87789d40f0f8. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/GBG5X1224282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cbc0d765b059e2d73811b60ba289bf584b5daba0bde15eae9cae97b266636e. 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/NLRD51403502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4022e867a346b711f523b6c5402e532832b20327e8b0dc58899ab774d9e68175. 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/NLRD51403500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc1b0719a207338a91f8ec32ff1b946f2824f6d4eff56a78640859d9ebb1942. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBG5X1224262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad897b047c7608e4bd595591b1c22f2b52c4eabe8eec61ef084519c3fe6631a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBG5X1224284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe990499f2a02f429d876506de4404ac8f53cbdb38d817b534afa87789d40f0f8. 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/GBG5X1224282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4853d664e7aa77796ef89b9dced8732f71649efa6312de90d4e917c159beb7ba. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NLRD51402328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083553f146f016c890cf047757630b3618e467b87d22db2dd3eb45506a783ff3. 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/GBG5X1224279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed0667dd3d7239b9978fe12d84773f7f1faa660fd9ec2c2c97818756f2083d0. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/GBG5X1224265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5affe0526c5273ded314780115d7b9370c45e0b41f40293bdd04d3aafd54f5c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBG5X1224305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cff19745016fd07d35ccca5ae6b80845c2c42aa1d4a178209db4b2eb1ac713. 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/NLRD51410185.