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 0x6daf397d493b193f732fa2bb24da55a8b60246d8874ecf925fbc71ff14a147f7. 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/b352b724-ae4c-4d30-8df8-f31dd1e866ac.json and https://artists.proofprofile.net/proofs/artist/b352b724-ae4c-4d30-8df8-f31dd1e866ac.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 0x97f0724918f55076fa19c5336faa86ff1c9bdb017f22b7f0a08a3cf5b7304d7d. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZCE61828658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97eb04c7729362942cdfff536c2b208a355fb6e2c014d0a1f089b5b1a515878e. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZCE61828659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772804d1dd5ad264893754a3423daa1887abb2eb303f8c091c1e0eb2dbf4c089. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZCE61828662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e63c2d12023fca6ee11ef67f5281a775e2e0ca3b059e1d3aca12d33be2085c6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM2PV1815487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7363bd851e80da41ab3d6b488108683066f4c991995cd363b902fc6a7767ea7. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZES51880188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548a7b315cb2c073c396c58f1efce53546ae04da86e43082d1579c450c4e33fa. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/QZES51880190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e9140dd135bd05d32dd7b3ad404df8fd9bb345254bc25ad815db13a520955a. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZ8LD1947952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19aee98c2fb95fe0ef3408aa45b4d9009501b5a0df219adc2b8b693eef79ac24. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZ8LD1947953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfd694df7b1e267f13996620fbb69d736a9a8763c9f3a4ae9143211682117ac. 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/QZ8LD1947954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbee8bd2bcd2e0355dd5d337bc9b98c2b75fb3d465720342b5514f3d0a7ffddf. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZFZ41929301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdda49c183313fbc7a27a2d0bcdc76811d4dcde9fccb08f4ce432ae389429b8. 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/QZHN31963048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24c436cc2e75b198dc28b1eca0f322cdbac741e116e9ee5fac1782c4305cb01. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/US3DF1998702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c818ec7662bd4d668be8c470094d579d4fa02d9a861c4149e6a7e18a5556f2. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZHN31962875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9ac1f6387b4e26d83b9256ee55dbf8ae5882fe14830a5adfdb5b118485879e. 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/QZHN61978431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae86f07121e371dc2222bbbefcfa6b777e996bfc0f00baaf3d038ddf73ce6ab. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZK6Q1925276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b85f6a293806231a40b6adfdcf9596824467e4fa7cd7d1719da0fcaff97a56. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZFZ32070228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518421653574278c845c6096a060d5d4b30dbc1a921c58c4d6cca7dc8b12eb07. 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/GBSMU7739273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd686d2a00ee8f20bb781827a139cbbaa45eeadd81bf8f66b7a9fb17fb2584c2f. 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/GBSMU7739702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c284b4d378e06cbe8cf00092e226ee49bf7cac0dac815e8cdfb5c13c17b5f8. 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/QZHZ42040292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a2fd4531e8834b5935da654df97938ad4d20f2801f50796b71a3fec79caf27. 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/QZHN72060274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28d48d8deec289a3ba0f93281d7b1d135400b25b1e1b614e78e69fa0fa363c3. 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/QZK6N2156001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e51013af2018e7f1498fbd6b28077b57c2a86e1b727e7c7a4234145dd31ab11. 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/QZMEM2179866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82253a03cfde48416a350225ae69a7a7a2642a84af2e0242f65d28941ed70dec. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/IL6652204335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee2a923018d7a96d4e87fb556d89592168720799f6ec66c3093c1c0e8df1bb4. 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/QZTAW2290478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217baa03bb3a9764ddd37724f77be1ddba81549e40f7800644f852cc3f26e1e8. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZNWR2341535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4f9da2e2803e967cfac3586e09a4ba59fb7a7e6302718b944e5d0fd34c3970. 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/QZDA42493504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123ba35d40273236260f7ecf11203e3743d1979cdb25462a7ad3ad5b9875cac8. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZES52460921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7ad8385bbd56010025426d6d860338a702215649c22aaaf946b62798bf9fd0. 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/QZNWQ2439377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1b8ba278eba2102af41eeb8957b24d3a6c597d152b5670876907391d3dbbc3. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZMEM2437157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd853d76588712232164b419ca80e0345c76fa41294c3ed014e77acf621752ffe. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZMER2434049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238b2b801b8267d506ce47ad7194502f73e3eb6484621bc97d287f6f6f1f0a4d. 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/IL6652410081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a1cfd38f1a2ff39c930db35f1f7e595e0da9a5c018d851b3d756fa1296a2fb. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/IL6652511948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b52dd35ad37a88f8d01ac14150cb4857bbd885207828caafd5e5de6e445548. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZHN82512797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bcce74f5162fb50319e995a762d7ceb0c7c80f90bb5c00a1ba101eb638fd2b4. 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/QZK6G2534946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdabf0ae3166a1c03cc81a60abef7ce4b82a06982b70c5e4e6db36d5c6fd65ee. 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/QZMER2567814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a1003af7fbf0e6dcb081f0c9e4e7611dc1e7a524d81ed398fe0874e22f1fc4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZHN52075172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9972d1739be91487e8eb2e48190e822cabe4c77443fd69ac74d02fd086cbd2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US6QR2500033.