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 0x7996ce441b03a3cbe89c5e66b0129c975be636e534f55a49ce39463d7bc770cb. 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/a95213b5-55a4-4f84-827b-2a3eb7ca611f.json and https://artists.proofprofile.net/proofs/artist/a95213b5-55a4-4f84-827b-2a3eb7ca611f.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 0x9e48368eabb5ae289c48c91c0c78065d09a5cb8ff0f37160f2b8feec16c93fe8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPB602150602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201d507e0dd734f62b010d93b8cc3b4dee008e6106683e60ea1a663d5543d432. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/JPB602163436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b4781243768d3029500d2ebfb7199b9fd1c897927d4638249bb02e38bcf6c0. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/JP92N2208594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1ea7d7062289ca3826038a673ac7a2ab54fc4cf92570da7ea3db2a439fafb4. 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/JP92N2208595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14ce30fa990469cda5d7a5ba4c244f3edc5662b74804884ce900ad7ee8d3eb7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/JP92N2208596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963855e2111c64eb6cd378bd6b16f33765e0de2a26c907d817683fc6d92301ba. 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/JP92N2232757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928324446481d0da7a950237465979eaa2ee26cbe5b83555bd69ca86647591a3. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/JPWP02202237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabc7f0cce5eeaa61f7b1529becd6008e0a71c6673fbdaf92e2470dbac689621. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/JPWP02300135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc516c04f7811b7b2e6ac378e3054c5302abfe53843e1f8c8fe8a236c572487. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/JPWP02300136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfd21e706a46a28e2a2ffee3cd94599db7e764cf93adc0d438fc418d685a59d. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/JPWP02301369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe460d5b87c97dc1151d58dcbc291557bb4559fc4e3a8d1264f065accee935382. 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/JPWP02300979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc45277e2f2c15c1c27c7771c4981bc3326fefd44c80041638cfff74ce77678. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/JPWP02301214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621216c1c80e6175b083cff225b27ce38bd86d4eb8535a0245f671e28a8604a2. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/JPWP02400446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa977388578dd8d07e21bcf978b6331504ca0dc2111e2120cdad7c6fda105125e. 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/JPWP02400447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae766487d8cd2e07c3947e1b3a8efdedb489bfe370be1f37a2a40a891fc143d3. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/JPWP02400448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624bfef66f9b4594cac60ba70f8c49e2a3a917359a28129d36477c2638b334e9. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/JPWP02400449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda46f3e7685849cc01101d95f2dbdc265f8fcb7e45e79b7eac44c106869469c6. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/JPWP02500468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d2546191d7e3afdb20f1e8ba25f9eb50c0ee0c4c900cd8414c680237525bfe. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/JPWP02501381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7262f1ed4d779272f5f488a650af50eca90f78f099f0de39fa449739ea54c39e. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/JPWP02501382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2a234c26cfcc3646e7c285886a531269167476ccaf612d4f0136519b2147d2. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/JPWP02501383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbce0f3c18cad2d58dd16e73608720f631280ec27d878ccc06903844b9295da5. 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/JPWP02501385.