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 0x9f4187373e384b97e1a41d9e20ee2d5e7ba9945e09995f4bdce824aafe9d7dd0. 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/fbfe33bf-634d-4bde-af3f-4163a25e1e05.json and https://artists.proofprofile.net/proofs/artist/fbfe33bf-634d-4bde-af3f-4163a25e1e05.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 0x3fe5f3d5550f81e9b4aad0bbe2e9485394d50ef134511d181841c0edd9e93a97. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USYB31614701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a4104f529b982e3feca477cb413d4cec5f7b8e3a8f933ebc32690f3b5d1a0e. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/USYB31614704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3299dd7acb6a5e08a9d58e7a4cf80d9d8e8e042efb54b2009b184afce6c17e86. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:08:34Z), 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/USYB31614705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a23b71733df60e5e007e39d4f339b0a7da66c52b288b1219f43621c2a5d1ea1. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:05:56Z), 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/USYB31614709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10376ee21e006775070797797c888e7388a13f56d74e56e9ea47583933820707. 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/USYB31819801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e214bebd341613b6996ce5dc2fca155d62563875b2b7a37e1b382ef42cd3527. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/USYB31819803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80d78c57cde9c7cd2144ee6590848f54cb53b2877bfbec34e574e82793b63ae. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:49:40Z), 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/USYB31819805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ddca7ee4235eb52ecc87ee7c321f340cdf806dcb4065770d5f2b62449045487. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T18:08:55Z), 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/USYB31819806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b00d2dd015c495174dde32e0f335cafdc5710bf2350f58e207c4e77a33e1a7e. 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/USYB31819810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3693760d0f909e4275ffad792d6da17ee99e1ae874c35c5bdec1d526185e7bec. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:39:53Z), 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/USYB32026901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bc3175c1e598718c79ab2d63d7c9fb2f09f87cb683145b7f23ca0e2c4881a3. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USSTT2200277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1295799dcf40b1d15bad3c0bcdf1578007e7f6e259f4f93a020ed81d202faa. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:06:34Z), 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/USSTT2200278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621cc942f5448293edda7a90b0c5a0439b3dc3b34e46ff89a2d0120d890c95cb. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:45:44Z), 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/USSTT2200279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f61beae960937258a51aefc95a4a00e7ab084b2823d3c9b13bd62ed894c32c. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:37:08Z), 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/USSTT2200280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dce937372932771beb99d3006dc6e9364c3f62d47ba249f284c2af842661c8a. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:20:24Z), 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/USSTT2200282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6b486ff50322911049dfb1525835a55d65d6aab23a66d47df0e1a88a32ef9f. 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/USSTT2200283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a82961544b7caf06cf5d99ea1a81a615a8a34c75153eccf6bcbbb73378ebc6. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:44:16Z), 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/USSTT2200286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966ff37a3cab50a288b0084312ad21d37ba2dac46321fd7c4cd7e79bce84a249. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:08:36Z), 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/USSTT2400093.