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 0x72998387f1d4aa7ca09bb542c156a990165cbc6466758b04ae9200d6c1a58ed7. 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/477d7e52-6acd-4909-918c-54442569b1f5.json and https://artists.proofprofile.net/proofs/artist/477d7e52-6acd-4909-918c-54442569b1f5.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 0x2a29704bbf9783a1874adde726c705fa854ab9757f744f7a4967c06e5c2bedbd. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GBKQU1992851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15231b6d3c163299e62d67c8fa50bfd67c0418abfaefa96d5fda9157bf4704c7. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/US83Z2007441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9700a7ce808668a156576b194e382537ec1e1e7d0adb2197d6dd00fd228f366a. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/US83Z2007435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79814325c740ed8e52fd59de1dce8bc12cf7d875102b264145bdb7e1c687f18. 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/US83Z2007436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4c648ebde34880f67b6bbaa49ba2438f22583afcf0170a16ca8c8111cb713a. 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/DEH742045396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55630ba5f2fa42e1078ab1d7acc066bbd436f4283232cf3022cc2112037a4096. 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/GBLV62027845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3b3107537005a7486210231a1cbc758d3d270733fdaa6c508be32db30e0ddb. 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/GBKQU2253197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509335c311c7081270fdce11a4986307cbca0ccdccb1edaab7205e1c72963526. 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/GBKQU2329586.
Dog Talk - Valentin Huedo Selvatic Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01dca3b4981e513c8af3afef88e1f57241e41c469008d6e80ccd58661bcd12c9. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/GBKQU2329587.
Echoes From the Underworld (DIBIDABO Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7678041926ed751aa3ac05c81d78e67a7c947dc1a53769b60e1debbaa18e13b. 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/GBLV62409816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf81435591fb95d9ca1c2238b2a706236b1828d02a3d46396654ed74bbd3cf7. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBKQU2396351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f599cf1ec86e447dd402b90c6a1de75da732f48154ae3554f16018c814a0a3. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/US83Z2303738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95dabef1278c9e4972d4e7947de821b2d5a3c2d9fcf0d2f381f9d4175c16174f. 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/US83Z2127814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3e7dd061c90d96041a120f53ff05e1dcacdc60b8c4b66191d8a05d341303d8. 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/US83Z2127817.
Bar 25 Music Presents: Sounds of Sirin Vol.8
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3b3107537005a7486210231a1cbc758d3d270733fdaa6c508be32db30e0ddb. 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/GBKQU2253197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cd39b9e9bccfc368f7d885cd5b03ff9c530f445efcb39d40e5df693af0db04. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US83Z2312441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f31c5ace0ad86c7541517bc271f11cc65905ffb072e01cb976bee24e410fb7e. 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/US83Z2047112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06f9babd1d90a21ba0564a7656e8b8ff0b642041f8a7abc06d82402aa7fbfa8. 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/SE4MF2200378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06f9babd1d90a21ba0564a7656e8b8ff0b642041f8a7abc06d82402aa7fbfa8. 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/SE4MF2200378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9fe7ed8bba4f7ddf35943217f2222eb528cd654fc1c883cca833eb56b52a5e. 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/DEDD72420023.
On the Radio - DIBIDABO Instrumental Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd5f4b827e6203df50a13eaf07f2f5f928b6c25f047151ed39344e45868a185. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/DEDD72420024.