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 0xac9395213b74deed525987cfd9cc61adbd2741801a003ec91c9e0466301087dd. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0f1df9b-d82c-41a2-8a43-0c22cdb68138.json and https://artists.proofprofile.net/proofs/artist/f0f1df9b-d82c-41a2-8a43-0c22cdb68138.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 0x40593ee3840d098a614bb9502929104d97916da3edb85b3c4e2e6e18823e9e8a. 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/QZES92162117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35adc32f24dab814c61a37cd987c2aca8638ff047d8e7c3121edc6d9cf8bc2d4. 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/QZES92162119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b4557c32a8934692a315893d1cebead1e891dbeddc580c050399b46b9c41c4. 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/QZES92162121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf636c3e19b7b3d539718313902c3cfdc50e57903206c39fb6f5c6da69197c574. 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/QZES92162122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf331c11e0789370c3e6564649890828ff450c6113b0f1070a0d0be36b28ee1. 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/QZES92162125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73991e24af9929a3e80aa9badd41b7aaa51b3bc0fa6c8c18471c213a98c2de7a. 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/QZES92162127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e48bf4c5a436335a448298e25709c560563d016cddd3e8ed570d89c32884429. 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/QZTB72233210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda826fbb619c98494eac8f83409fba603df565772347d5872af7064b6eb77e0. 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/QZTB72233213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5a132c6f9de9b0b3d855de18f32b45b7cd47251b30721569fae948363121fe. 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/QZTB72233214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4b17eb8d0a162b95cd1e6c251a1236b97d05ef227d523fe6113e3cc98486e2. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZTB72233215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402cc6ce5ceec16b73a55f1b0139c417814df2c3131ea24c1dedf7c927ff8474. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZTB72233216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc46fd2a3ded973e307373cd24b1017a5524e4895ad4a9551926ec0dc564700. 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/QZTB72233218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1016267758332042880e8a0e1a57ae07eddda4f94e9d798ddc82dda37bd691. 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/QZTB72233220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd635c4bb91083419823f9464f8a9f8d15140d03e176a26471ea2ecafede246a9. 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/QZTB72233221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a2d97d8c6bd018d06865def22c4bbded3ff4995a8bd066fdaecc977b7fbe02. 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/QZTB72233222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ce1e9df9c86c7cbdb8232e83bb5b97c2a1b5ba56c24fae5607c8c7eddbf7e2. 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/QZWFM2311745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114004c8c8aad366dcd0ea5506711f8cd50e506d6e4656dea2a1d12398c254ba. 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/QZWFM2311746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636deca9cdde9a632192cf6eb74e303c2ad6e334827aceb825184b1016637cf6. 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/QZWFM2311749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4dce4a32bfa0b157807d0053c3d7ba5122b5ce80c752daa572982f6255ffc2. 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/QZWFM2311750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162182590b34e5b82600943db4fb280e9b062be4e4d52dba0dc1b220390df7a1. 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/QZWFM2311752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64781b6802a7fea9566c54de10d776094adc1b635685c1c1fc7bf0ef7cb17f63. 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/QZHN72093804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a22578a1f960edae18ecc33008394d3deecca392272f753749b34fb673c0fe. 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/QZHN72093805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581d2078622bc4c699324508a7f84805a90881f1fde62b54e9a4c8ecfd691b95. 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/QZHN72093808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1722ce2f9f23b7cd2e48020f05ed72de17a3d1e867857234e06ddb1990b549. 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/QZHN72093809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd198f5c715f20d549e331e54dda0839b52cef1c3e7655eb9216532db147c8c55. 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/QZHN72093810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670dfd94025cc139d92fc7fc537fbb5f39bedccbd20ff723330780b5d7d88daa. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T16:38:49Z), 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/QZHN72093811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a1b603b7a52157cb9fd79e63acea87e2f943177ec7548c1cf98d728ab8ca19. 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/QZHN72093814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2abef6ae01e9e763595d63232e30276ec8f91e6de81c3e2ea6d0f05454bcc35. 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/QZFYZ2135263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e85f390b72adc03f489b13120cb3185c4a735129212e95d86bee416f82c33c2. 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/QZPLS2230819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2aefd22be2eabd498418786649a54cf2ccc71ff3cfc87534b9f240677452d2. 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/QZPLS2230820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbcd6fec748e3993c20abe885255a3bebc8e7d4b8321c628517f11b277bb9f46. 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/QZPLS2230821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a9cd18293f3a56a73e5c6ad531f2c5ac84406c9b4f093fbb3f0cacc00720c6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZPLR2223231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0acea0dda503fd0abee531c969ff350f729ff0cb3f964a94f5399b3286d494f. 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/QZPLS2230825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f957db77c262b9d4f2cf71c04ba8d263d354bec69c839ca8df46baca53557b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:49:32Z), 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/QZPLS2230826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a5264b1db96efc35f610187be59590f88e35fd7075fa5a540120713e4c6df4. 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/QZPLS2230831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4c26bb3c164f92b858209d4f4d643d4c1f6252d711e5749c61ece4c758ef5f. 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/CZA232301413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a9cd18293f3a56a73e5c6ad531f2c5ac84406c9b4f093fbb3f0cacc00720c6. 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/QZPLR2223231.