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 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 0xef0f989909f748031d938463745ac564fbbdde97791e61f877c88317e4a5b6ab. 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/f9f33218-569f-4d1e-b7e5-8d8f7ce949db.json and https://artists.proofprofile.net/proofs/artist/f9f33218-569f-4d1e-b7e5-8d8f7ce949db.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 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 0xd9f72a2c75817fd12ee6ff8ed3cd5b90427bb17a45e99ff0ad8f1ae7ba31fcee. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/GBFU71502490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcb49bee83305a7c8dfadc8630cc2495adf7b4c8230ae5fd555b83af6fef3c2. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GBFU71502534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9fa66deb937aa6d670238ced53cef10c183c71b5ff8a5e6d0ccc2db9195ae8. 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/GBFU71502577.
When You Leave That Way You Can Never Go Back
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7617ce02335f039ecbb9f312915502a77882f841d09f62568ee35cabd419ed11. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBFU71502582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97703185c38f12d737f76bc4b834c68c3a2d4f206d91683b4bfc71b1f76a888a. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/GBFU71502585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3218c9cdfd8c7c125702ed36f05f03f4eb2497671df8f1f7ed4c3657b96ba730. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBFU71502590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa842aa42dc4f3025a2a9505af5b5c2701cd94ee0fee326bdd7118fca6ef7ae28. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GBFU71502552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abd8d622699465e50eaf29f2de3d8a28fe790f3e3f1d0a5deb5f9b28f14fb83. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBFU71502554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf085f92a2099164e75fb7883592b9a9bf4824f999016d3fef0d260e769553daa. 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/GBFU71502559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf7609ed243bbc9f940cc443a4a825ba33fc233f83ebbbc4ec31d723324deb3. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T05:07:11Z), 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/GBFU71502561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0df870708d1d8c09a800ec3fd0d3cd2471ce5771e3ee191fd45132b29c12aec. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/GBFU71502598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a508315ebe809ab08c4ffdfdea0a928d21591414325c1bf62aca84acf2e260. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/GBFU71502608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f114cfa19b916db84cd1a395f94db8edd2ab96098d5229440db8c18ca9ebbf. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBFU71502610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52645703876b1e728eb506c8ca499bc1309f5cb2e79e6c34bce0b72d29045b2c. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GBFU71502617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f92154d0172b7a141618b40ba5a53a6f8b0bb48536d0d7ffc6dcb18dbf58509. 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/GBFU71502640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cad74524573bfeebadaf277e45df0335fd10fa1840205496bd954a88094af07. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/GBFU71502645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f317b5656a1a12d14d346d1d3a376c98366b5ab64442d4929f34e1c7f8e52fa. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/GBFU71502647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6f6f394ba4106a3283a335fb953995d744acffc6090a9f2d8f3ce3c5eee8aa. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/GBFU71502659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59b2856eab7e2bea2fa41a23c7b3d6921b9b3d26f59f3b1e845c62cdd3801f3. 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/GBFU71502661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182473d487b3df91ffbc46c103496bed11293c604efaece22ca515eb5f148322. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/GBFU71502714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e343dea7acf5d3e06974bea1aa8758b342825d3ca7136e1d328364f9b20377. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/GBFU71502722.