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 0x8f94e84857f735acacac168608c0b84234433df98d8c8672fdc214d00c3afe6d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/154741fa-af34-4674-a6cd-37db13ed17e4.json and https://artists.proofprofile.net/proofs/artist/154741fa-af34-4674-a6cd-37db13ed17e4.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 0xb32ae875ebb38f52a56e629d7a188001ee0df488a019f1fa9c691546e49a23b3. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/USA2B1700478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12befec508f0eff6bff123ccbbd46fe8d73f0ff1d3f46f02f6e6a7aa328b0f00. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:32:31Z), 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/USA2B1801453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b3d094590faee2b39b880e99b724a7d2b1bf82e4f04fd91cfbaace5fe3c93e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA2B1700166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c387159b5534df0a6313a46dc9bc1d953da17524286e005db008995fe5c1406. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-17T00:12:07Z), 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/USA2B1700169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456cde9f81713db4363e4799e5f802b6a86045474bb5e06d7c3a8842680d1c22. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/USA2B1700170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76f32eed5e49ee66ab1ba3d994dddd2faac69f98f1fcbcdf4d02811ca436cba. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US2FD1809304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f49e9cd063c684418de1f52f444fa977b86977f358a961a8e195853e26460e. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/US2FD1809306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbff5d05e9157fcf4b95b16f8e22a551ff2a2a4c10e31e90a50e0675e83d861. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/US2FD1809308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1de22b4905fbc37c99732f4cd3cb18fec10c6e6577fecb0710ff448d008cf5f. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/US2FD1809309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e436f30158c40ecfc7231be59ce5235ca5bec1017c0e0c42a8b5d88a1c0aa7. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/US2FD1809310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694b9f6433b94642245b6708b3506968104df0f4812873e5f3d231090921cbef. 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/USEP42249001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddae488f89bd74361cb93b8c144404b133f7068e9fcdffc389fe367b24f75b3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USEP42249003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694b9f6433b94642245b6708b3506968104df0f4812873e5f3d231090921cbef. 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/USEP42249001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c859419e9effa0278a993a79fb98fe8cee65352dc755b9bb894a6736debd433. 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/USEP42249002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddae488f89bd74361cb93b8c144404b133f7068e9fcdffc389fe367b24f75b3. 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/USEP42249003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0839dfc8af3de1173c03bd8d14f16c206be1d68df426e010adf65299b2720a9. 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/USEP42249004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd761e90db730d4caa741696c7b1f3bac86f4664482ea7304f59a9c9afbae7885. 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/USEP42249005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227b1d808b9556850f87d7ba70409d1b1bc8f57e5e6fe89a03c01bd938996941. 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/USEP42249006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa107ca046dfd7f315a9a769762ceb3aa9d97237cc12adad74835a41ed3832b59. 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/USEP42249007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fa82f5bc9dd06984a902e9fe28704b1a48f2c8bd08be80edbc0bbf8a6b5dbb. 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/USEP42249008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33305963d1c45148ff10a0fd4c9755a06b4136ac62a36498f40ddebf46cd88bf. 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/USEP42249009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bff6ec83a5be2d262646b1d4f546df564d9da66d0c3e45303abe971c549eec. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USEP42431001.