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 0xef27cf7edac8c6fabd2b79f028fb19ea99f682f52d3ca3cd44ec8caa53fecd31. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/445cc98e-0166-4292-a7ec-de16a4e6dd9b.json and https://artists.proofprofile.net/proofs/artist/445cc98e-0166-4292-a7ec-de16a4e6dd9b.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 0xa40f8f2133e91c3f64daa0957016fd3351de9c9b50b619a1d60065e942736fc4. 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/CA02W1800063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83be86fa2f9418abe5612a4da1fd1cbc88b065f55c8cfc7c141e518e6246b3e0. 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/CA02W1800064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123b78f4a07e42e148d1360dfbe73ff2a31c0d31d223d4c244883b413a8ef6d1. 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/CA02W1800065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f28aa7bb9589ab61a049a3f82c27b0d76ce6287be38082e606cb755b50ff83. 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/CA02W1800066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4305ea07b553ffec395ea162bcba4ded63ec94631a500faaec2daa311b52c75e. 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/CA02W1800067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e421fe777c251fa86f628eda7e16741898d7b36c042bf12cb325d50e6ee13a. 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/CA02W1800069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35bbd57a61f7af21fcb48efc7a072c54920796a8e924be39e86a7add5f0bee3. 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/CA02W1800070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489600e289cb2ed8f4485648965124ae010af6cd547ab3a1f19945a0ba8e51ee. 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/CA02W1800073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc4a2269ab0c948e66acb5c8d4e7c7840bcb4004dc33dad70e03cf940eca588. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZK6N2433995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7d88cab555059c36a15326a962384e440bab975d3223fe1f9f1d3e4f43042f. 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/QZDA82485923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c67988b51fab5762890b6156752186c7110f33f62b388a4b127fe6c56c76d72. 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/QZFZ22462048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1330ce464be7252579ccb5b0ca0622b6755eea0bbd905bfdbeeec49ef03b6144. 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/QZDA82250168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479bd4c87d882b444f6d08b7706c56975e16ea4b1ca3ae64069d065eebcb3891. 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/QZHN52287564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479bd4c87d882b444f6d08b7706c56975e16ea4b1ca3ae64069d065eebcb3891. 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/QZHN52287564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1330ce464be7252579ccb5b0ca0622b6755eea0bbd905bfdbeeec49ef03b6144. 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/QZDA82250168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35bbd57a61f7af21fcb48efc7a072c54920796a8e924be39e86a7add5f0bee3. 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/CA02W1800070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f28aa7bb9589ab61a049a3f82c27b0d76ce6287be38082e606cb755b50ff83. 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/CA02W1800066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123b78f4a07e42e148d1360dfbe73ff2a31c0d31d223d4c244883b413a8ef6d1. 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/CA02W1800065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4305ea07b553ffec395ea162bcba4ded63ec94631a500faaec2daa311b52c75e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CA02W1800067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d7aabc06da51bcadac1077ffa683c9151a8496f8ccc0398058a21c86af6548. 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/QMEZE1702958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea354d34510a02e595ed00db8de12c03be8133c98a97ea45246b9c2a70a634d6. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBLFP1627954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68607ee6869a36115a666f94bc3310f490e8ab6a3db036160a11127056740c63. 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/CAK8K1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c68556e98eed05203b6c291dc97e5011add2fcd9e9c780253d714517e7f4503. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMMUK1500269.