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 0x0b643477cbb1faf6d8155c6f963166ee493e80de1358a7e962687edcf9ff4b92. 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/f378569f-6233-4ee8-acde-76e7ce79e753.json and https://artists.proofprofile.net/proofs/artist/f378569f-6233-4ee8-acde-76e7ce79e753.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 0x3f027d0a7401090747f0d1caaad7651d22779a5e7806c29a4d645228051b09c2. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZW9L2301479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef053f4cd49197cc8701215f2a4f87897c04bae04e4a1f656961ababf0029df. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZW9L2301458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb452fb73fa785fc68de4e67d4eae3a846d36ebb78ee98d121f6f4ae09e54e42c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZW9M2321405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c09be042a59ec194f10357245cefe99efb2fe00542dcba3b480cf3b96b50fda. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZW9M2321406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4003c75153c3ba960a4f5a7aee02745f59d3a37331a395692fcc40bb2839fb42. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZW9M2321407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1eeac87fe51c7463800a25291d1126444808132454ecdf9e9fb15c28ffb0c73. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZW9M2321408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc835bc5544ee3a34f3d9d6de70c731127e810517dc1d4105940396ee16b3d2. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZMZ92441838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fd5e3f756a7adc80ba548e175f278dbd2789c115ab5430744377b515a06667. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:18:27Z), 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/QZNJX2413422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82affebbc831426f4e16fbf9b2251c2b478cd1f5b09587691b3a7bc3e98fde77. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QZNJX2458609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0357aa9abef8f636115e616f7ebd0b52a76f0011a2a0aa90a34b7b2434d2ed6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTVM2434933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda403a409c9212f89b0da92634166d7f54be577b85f17674f206517c2f76bfe. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZW9K2419833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8674ec128aa0104c927f3b0d57db3db1a3755b3ba5e5167104cbdce7855987. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZW9M2459370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70138b2fcc2937d5ad078d7b309637a6f3159b55f20b54e3a07584d248bbb046. 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/QZGLM2503609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a89a87a1c1b73faa44151a6790548f1573781d15dd8ea1632f3505f657b074. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/US7VG2547865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ae24bc73672e4aebb6032531c5e1cea65802e934d38bc654de0f0450e22937. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZNJZ2503719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b689f59d4944b06a530d0d569277eef24d5c7240849fa24f4f56246b6a0a473. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZTPX2529894.