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 0x9a6121a5b92cd5367c817b6147a44685b6d69a4a0a8552386cf00fe8d329f63b. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6773de5b-4cfd-4507-8185-89feb01cb09b.json and https://artists.proofprofile.net/proofs/artist/6773de5b-4cfd-4507-8185-89feb01cb09b.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 0x97963e03ae3815fe191cd275db8dbb0c9464233e9f56a7c71853a02809f64ab6. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ITBGD2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d4f6e0d0ace54bb8a975d459fa56aab02281dfe14cffe146366ba67c87735e. 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/CA5KR1920134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9330df385e0ee6ecff0aafbf960cd94673ffdd9c4f497dfece3e83bbbbaea43a. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBLV62318836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bf3e918b66cfc9d18d39d89f3aaebd95f2c5eeda5ba07f4b6c1e01d5ca4ebe. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CA5KR2408550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a155c96c632af96aec1e88a6a9bab0397bc95185bc78ebeabbef7f51826ba3. 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/CA5KR2310079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a8317b42dc14804462b0793f120a95180dc373a65b8e0cbc4d879e59f95f30. 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/CA5KR2310080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184fb753ba80fbf6bdde43f144207551edfbe8f21fbf29e31a6fd5606b85717b. 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/DECY52202061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f622eac862316cb957a04d5b73b992893a5bc3cafa4927cf9b505b80179a7a. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/UKACT2231393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76d4f683e16ed43ae0fd5ac4561f9efc3222ae16cc0ad6b94bdc31d63214eed. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DECY52100781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08389a0f46b2fa2bbf77d58a8c431b74c87c18fd77d5d3fa366e34ee20fe7dd. 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/ITBGD2000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aca93ae9a2aad0c111f3ad75c348f1eb3f4205e8c4c4c749342a88a35ab37a9. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/ITBGD2000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ffd33412a1b53c731098ee82f4313a74b57a11e8f53364e8c054489881006f. 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/ITBGD2000042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fa1d71adba81abcf68344c327752da4a2144829551d8c1884f7b01e7e40b89. 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/CA5KR2019948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca8ac6abe84c61cb2a6e8a42f7a9f8fed776a9a62c69d3228a97b53cd7aeb48. 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/UKACT1915173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5effdd615b971afd87a010bb3b4d3b94d26ac68c6048ae0dd7dec885e9cbd185. 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/DEH742510225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d3a473bbd5c9b3ee89ed2d10241f400c532e8d5a9532c59604660cee7941dc. 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/NLCK42504343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb469f0d76c5ae834407d494bebfd3d24ff37dd4669aad331a69a0388b83de1. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/NLCK42504344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e40fa73b01d5f322987d480befa1130aac7dbf9f5dd2f02a31ec92d331f7da3. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/NLCK42504346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b142984a763e145a925974083cce765449eb8718c394243fa3b38d22c4aa295. 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/GBKQU2105153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851a79dc5ef35fa939bc73ef32e1846eaf48e5ce79a92a0cb4c35c5c3cec0d04. 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/BEAA61700023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4434487db05208cad49e8fdd3f46076a7a81b855e7f6405d131695406e4b4c8b. 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/ITBGD2000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41e93c09be721f98aab9122449f1924b326ea75cc4bcd995c3d00ea60fbb75c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ITN3C1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305651d6f8fc5fdb0f1a3b4fef4abdef6b96c2d838297fed2d88d52117f72b35. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ITN3C1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42c0a8a08928b7bbe24bbdc7d0fdf49f52aca0b17608f118e77ab0ac38d2366. 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/CA5KR2265184.