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 0x86bdb4f36a44d980088d8379c426ee58d81b2b49b49cd20c79a0b2e5d1ec6d7e. Chain 2 (Bitcoin): anchored in block 954580 (2026-06-20T17:48:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7322e35-cc4e-4584-ad60-3945fba55ff0.json and https://artists.proofprofile.net/proofs/artist/b7322e35-cc4e-4584-ad60-3945fba55ff0.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 0xad11133c2e6ed042e4869000c58d5317710ac6a18bf7e2f05d8ce2ead9610c62. 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/QZFZ32203833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd466f1a67a4d9101df577070e7df2ed5f9c2abf1ea682983fed54f1ae3157f. 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/QZFZ32203837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465c3ab2113b679a2d808513e14484f1b879ff83b290bc1c5a09c69215cee771. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZFZ32203838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51eba966b6c50dd40b98989bc7d9615fc8b969fda1b545088a7aee26cb5620cd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZFZ32203840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784c11be53de482705c8b457ce867e9018fa774d387c7369fa5b99573662c2ef. 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/QZFZ32203841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c9615faa48025376280b9cea698b2abd211c70fd7171bcdf059be2aee03453. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZFZ32203834.
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 0x6ea558b09690ad6fd0fca3c6945c10b065c92214d11915f3fce449fd40321a3d. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZFZ32203835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f9059f32c5041aef7dbdf6a3fb387a0070c6d26a7a932f51f178adb7e92750. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZFZ32203836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854607c2780f9f21a38875f2cdd8de6813ebc70cabe79186310892e502b0ece7. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZFZ32203839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1635a8085afaefc6e7bea4c12509ecd912c5d3c2d91d169e1b5018044a105c6a. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZFZ32203842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2244815dabe89e378bc3c9d8ed2527f6cbe5d5d2caf9abe7d6ac023be105e168. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZFZ32203843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8bc0506ba0bd64fddffdfe5b7018503dc02cc444f0939958d8371a354c1bb8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USCGH1896755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c9266e6371790644dbfbde800f43b109e94572cd254f2599e24cbc3a4aac07. 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/USCGH1896757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e22be38fda32d15973882520b621ba47a7d5d19f5e051d4858d355c4bf8620. 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/USCGH1896758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3222d76fd1e5c301003c07015c79dbeee5a6cfed170d47243ed01fcd6dd6ee. 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/USCGH1896761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc914b2e84fd07a0029d65acbaba914ac120b24290332a0f931122258ca89a5f9. 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/USCGH1896763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3feefda11d6fcfca10f692aa6eb9c094fe6a858a2c6539532b2915d6bd527b. 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/USCGH1896766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6f0ab5dd4574073910abcf763af3ef07ee106fc8c876b80bfa4e0d4491daf7. 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/USCGH1896767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07c63004fb3481b69e5a1aa9f50af5ad8d5fe6446b34daa93b005cb3715997d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USCGH1896753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a3f767e3d42e648e124a7dc00ec1f893995c3d2fec282f2acab340c525804a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USCGH1896754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ab7e2cd5c44318a2487c98181de44cbf6412f879e01d6d095da6d8a32b5098. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USCGH1896756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf7ee85ca47c74d9ee32d2bbf8bd8c624716f7227814370c038d70ba3c3ca8f. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/USCGH1896759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394ed4d68e13e7c7b5d344808de8be833b7d767d53b719f843a5ebe10bd33add. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USCGH1896764.