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 0x61f93d97bbfd39e2f7aea575ef9aa922e8e541aaa7672f8e926d3a828e509a2e. 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/488b59e2-6fe3-4cb7-830e-27269ccbcbd5.json and https://artists.proofprofile.net/proofs/artist/488b59e2-6fe3-4cb7-830e-27269ccbcbd5.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 0x7cb04fb072ad396caa9dd72b4dab9a51ff89ad0404fc31dbaa41c3fc85109578. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZFZ42552982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9149ad7c3cc7d6e3aa816aeae00b9c0aee3f9307c6bbaf99bbc52ec36c2ed3ed. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:09:20Z), 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/QZFZ72577800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb04fb072ad396caa9dd72b4dab9a51ff89ad0404fc31dbaa41c3fc85109578. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZFZ42552982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723369a0b78c7c6a07a3b83e2a190db84130c4877a34820ce60688a810b07dab. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:39:43Z), 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/QZFZ22582560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b78251028ec600bd9bc47ca6bf8fbbe458f6e5bdbb73640fc80a69589801b81. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZFYX2570372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fee9ed85cde4538328c99c726b94d3ed1c6d67ff254c76e6d8617b73c67293f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZMEM2571334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ef15bc0812d68412e8629d0829ec2de6283496d40510e43233beb4b5cd6a46. Chain 2 (Bitcoin): anchored in block 958635 (2026-07-19T00:58:42Z), 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/QZMEM2571335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ee318bdd5e5d4d0be7f2c77ef940132f981ee916f0bc7e31a8532f7ac12f3a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZMEM2571336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81c5e6b1c2e1604b0deb5635c1c599583897b4a4e78eb8cbaefea704ca002b9. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZMEM2571339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765875d6701821b10181aee902484e4c12be486dc4c0fb00078d4b2eaedaa996. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/QZMEM2571340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3d14db2de04fd65d9fa033808a6f1d98e939d07b0c3c36748ee96ec087d3de. 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/QZMEM2571341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999686690a0bce3fc6be04b84b72f7efbebbd53f84946a4b6dc7d1f3a40b5a68. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZMEM2571342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a45c970db6f414f3f6f4538e19eac510cbc0d3430b926c3358bf559a217bf1. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZMEM2571343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4140b6655c67242ef41e2d4383330a9b5324edc6c6e517c13f97dcb3e6d19b4e. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZMEM2571344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f755addaa92c6af6af339ba619fbe1db01f93496a2ef7ba7689999b2e092bc. 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/QZMEM2571345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a0722e48c18d8632e68f0b99b7928e8441bb9fcf02dc12f42755b3ed99fb03. 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/QT3F32529293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fa58bb4c52fe98dbe34f957defda2e4b1c2c6689d00acc4e00d19e4e11e327. 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/QT3F32529294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7323f5d53ab98a29849936e35c826bf8e5103760839b225ebf135aa9ff1f8e69. 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/QT3F32529295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1ee76b320ef6982d4a44cfffddf4605a253fcd6e19483b5b30e589f34fc965. 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/QT3F32529296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4406102bf17513d293e8231cdf62f27bf622546031008db815a0ddd8a2151526. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QT3F32529297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bf514aa9c26b970ce5aa4f417026b1822e2b991f0bcc1147db6d74967af594. 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/QT3F32529298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab59f3a3ff88514a54de359ce628db0e8427ddad65b5ffc6a64d08fbb8d286ac. 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/QT3F32529299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb862189b38efe329a060e5fedb245bd346bccc601e0e1d4fff7aa7f2a09915. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QT3F32529300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd996dfb450df247f4e060b5190ecdeb27b85fdd19f264a9ce16f297731ce7a7. 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/QT3F32529301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce55b12324a217d2fdfe2dea9ee14f9d5ad8d3a2925754da9082f948237f79a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT3F32529302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0e2cd979c782aac81f62d41d81f91a9e22e1b92f6012175fe71c3dea2a826d. 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/QT3F32529303.