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 0x9e5dcf4f5e4b1fc19de3db167a4f0207791b9f13560d93e45f857ac0b2cdb7c1. 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/7f0134d6-19f4-4510-95cf-906d87f13af1.json and https://artists.proofprofile.net/proofs/artist/7f0134d6-19f4-4510-95cf-906d87f13af1.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 0x7dfcea34ef0ef56b4d606c80670ec686b714d52c79722436ec4ee71942874746. 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/ITC330900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082a742c512c81d369e4c2c76a95079f15283d68f2390cfdf0db44e78915900e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCACD1597241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2a435eb12792ec8154669c4ea74f787e2fabb5a47374b38975a0e477fa7d5c. 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/CA5KR1512565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55dc42c3cb38ea86f4ea1d9080e43ecb52173c59c9a02db7f99bf4cf87190157. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/GB8KE1755563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6619031383652efe211e798b412a88bfa5bf38bb8459f29dec99ca901df8c1c8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GB8KE1755539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323243e301050aedb8bbac6698f898cb90e42cdf6b0e175be2bedfe54691a484. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GB8KE1755568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f67ffd7b19e9c3fb62e34cc02586a140f8bfcf1c15b31ed28dd94821325d59e. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:38:06Z), 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/GB8KE1755560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7fed177bc57703754edf223a102449594c58502d7cc209fee9fcdc25381c9a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:36:18Z), 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/GB8KE1755558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0daef99cad5516e4bbb2607842280e9e089fa2b9b5ab8a50e9f1a77af5eb6bb3. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:57:02Z), 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/TCADY1892886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe0109e87ad77f969344da7b24c689bcf88d2b6e308a0cb1fd627e006e4d4f2. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZHNA2074753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415ff969ec73dc2f5cc0f8cd98e1b1a778a8c77fb6a7299251f8c022fb79abcc. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FRR642001178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415ff969ec73dc2f5cc0f8cd98e1b1a778a8c77fb6a7299251f8c022fb79abcc. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/FRR642001178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3582b8143e1df7dd2a69e0f4e352f7238e63907da565bf90be5591e5da2650. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRR642300739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8548a7f2f09de2624f584a05df222aa6a3512e35c2603e876465f4612ec1c871. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:43:46Z), 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/FRR642301045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d2a1c3dbdad73ad664b0d838029d8b1508512ec77bd10825253d67da561368. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRR642301637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370612d6e8f9feb1d859b0c707452cb3fec06a2dda8c018733a1dbcd0948720a. 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/FRR642301641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa8957904a48e51041d66adfc2b1f86a35485f63b419356303b9250264d34f4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEH742436220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3fc19f3a409519f94988ba2de4948a8ff8592d171dc84aa50390c62f8bea49. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZHN62557970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ee9716735ce774b21c8a888e1332f8d9fee077a2729f98c1f051b8ee187cd1. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/GBKQU2548127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd705d752b5ee3e7d761baafb1ac068051a5ab63f4a74fe3f464bde877dccd1dd. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/GBKQU2563558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c53dc25ba9480a8d7405c70bc403670b4a806d9988452aecbd452875670157. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZWFE2512369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a8977a7f1f07bc0bb629e4333909da3d8a12b88d0e8c5874b7d53960036aee. 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/FR8V41500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f9fa327fc3c0acf8ba950af2bd6c178113e9dba850e28cce7fdb61b61a6c88. 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/FRU661021003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793af15ffeeb508f233058db1f30950a1639978aab37879d53fc67d9d7ba8979. 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/USDM31100133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68565c8869e772d857419c0a6078a476c8afb2ca623e53ac8a464413075113d. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/GB8KE2158677.
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 0x6e8db192ab7d9a87268a923095382a986fd46e766f098c6bb274852f3482827e. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GB8KE2158678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd51d804394e9063641785ca29d400267831bc072e4fb73585810e8aab893896. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZMHN2201452.