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 0x3a50893dd0a51d5a541e7f03441f126325807569e3f576d0e97c0971cbccc098. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/895abe6a-8bb9-4587-93f8-cf5304c3a659.json and https://artists.proofprofile.net/proofs/artist/895abe6a-8bb9-4587-93f8-cf5304c3a659.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 0xfca87c553b581cea1d5a46f4382da9bc72a0e66a108b539df7dbef95798865fd. 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/CZUM72000571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c734ab24aedb42d3c9d8ad1309b49bf597aa63546efd58af28f536467804f5. 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/CZUM72000569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a06efc5cd5b6277b44aa78ebdb0bce8452641418470319c41bf66ae64f26505. 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/CZUM72000577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6f8b1f5b78500dea6e5932c7f8716de70bc0f437df96a61277e72bd45fec2d. 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/CZUM72000578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86af49f6ebfaf5bd824d739659346191ba3cecdda3337637d05f7c73a10709f2. 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/CZUM72100653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b714b6f57534cba749c01452535fc7f6b593c12c654dfd6bb7b2ae935296b93. 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/CZUM72100161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d730345a595ac85b265b3848b2b9e456063517559cfe6eea33ec5f391864731. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/CZUM72100069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069d094db4543c9a6836ebf12d8439c7d992926b948f9e0a0910ab916fb76839. 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/CZUM72100349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69bb16df5bb68e3577b9af646ed82bf465c93638f45239f6b14c347fb8f8cd8a. 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/CZUM72100350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b714b6f57534cba749c01452535fc7f6b593c12c654dfd6bb7b2ae935296b93. 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/CZUM72100161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d730345a595ac85b265b3848b2b9e456063517559cfe6eea33ec5f391864731. 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/CZUM72100069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346c9ca935ab64f290e7e9a28ff48ccc3d844d7c03cac309b5cb3fd13c072e16. 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/CZUM72100775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5febf67fad1fbaabe8ec3e75a7c8b6b2b3cf9d1d2edb8319176510048a17267. 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/CZUM72100782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188b4f3193ff7372690dce3fcb1c610d4f9a887db2e7f0e181f4b1ca1b514da6. 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/CZUM72100783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebe3975aa4e105238f41e7922ac18f2ee6264d6fa6821a096164215a44bb03b. 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/CZUM72100731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378756d33667898073e47ff9af6b82e403b43fef142c08fd8a5ba75c66574ec3. 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/CZUM72100784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770e8f233f6ea117fba7a9f0a98eb774cbddef12250f56b7f8f72dcbea4a74cc. 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/CZUM72100785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d55cc150992398da7f2bc3991db25a2b86aecceaaea8465fece20de1171191. 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/CZUM72100786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b524077f719afedd9ac43e35e0221cfcee8ba26a1a20c1c027364735f15d02c. 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/CZUM72100787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a96b297444da2a890e256c6c1c1124b3085b2dd3e109ea4008ddd7c6087f023. 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/CZUM72100648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d84324139f96b147e3ff43a422cb398da7f225868f974b9e4b321e368106080. 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/CZUM72100761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78642e60ddaa5e92df97acd04d09b6ed144792d0b901f044515733a301c0f7f0. 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/CZUM72100788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a38fe539d217e9998e309e5d4cc645599daad0d645fb354527c78c0a12ee23. 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/CZUM72100445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dea1ab84542713c2c3c7282dbb411b6302ec05a9e5b343435fdf45912badcf4. 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/CZUM72100789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4ac91c04454a08e018c47095a67d2f6e49f63628403159ac36f60930639431. 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/CZUM72100790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34923d788bbc8b0357f84f1de9f0d71e5d2c69315a119257cd94e3a76f00d9d5. 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/CZUM72100791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e4fb48ca926c65b6415ab136f3dd0bf26836aec9a4d7d679e4a526690ea13e. 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/CZUM72100686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc88958b75ee1a1e1c94ff6c49bbb70c553ef21ba2ab2394e1ddd966eab8a81. 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/CZUM72100794.