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 0x44d2b89b5e2903be21b8b93f4331167c5bd01762ac915ba96222cada236125cf. 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/e84e6b3f-630f-4246-848a-f72f31887d63.json and https://artists.proofprofile.net/proofs/artist/e84e6b3f-630f-4246-848a-f72f31887d63.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 0x75dc60aa5c43f0dbdcecbe93399ad9836822dbf43a0ba453bef02d2219f90539. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:05:29Z), 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/AUI441200068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9323046550d28ed79deb0399852a6a529bc5b25fe56a078646710e80b152593. 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/AUI441200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc330df3aafa47dbca0ceb4d61a1a5b3be8436504305f66c2a7437b8152b122c0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AUI441200072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993dea5ce4bc411bfca4a9d997c1cde4dae6b84fd735dd6ba248df591fc3ab9f. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/AUI441200187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef8097a3b7465be39d7817c9fe6073d420daa3a1a71fc1f3f5570da2ba4cbc4. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/AUI441200189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8bdd34240a9c9211b8d77720de95c184238964fda13f4abcba22056fcbfd020. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:45:12Z), 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/AUI441200191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd8efb00097055a97da48fafa05f727aa2bc98f29a0e34914f807279e4d9faa. 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/AUI441200192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3aee16b3e85529133668e3d134b4bc9ad2ca325079522e82f3f070aae6a448. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:22:38Z), 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/TCAEB1993623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e40b1ca2eb43ebf4997ec6f808293905764127688e2dd9da25ddcf7c3b14bd. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:30:07Z), 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/TCAEB1993794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f370259ff19abd4bbfb00880a0268da48125e82483bb87019872a0e5c268384. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCAEB1993618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293fcdec1802e94c79a24674e458a40f8211c1683ef531e5dd3a685d8c947971. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAEB1993685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb521649dd09d06b47e29c4862f66168704904086195a0771a1e168b29d0c37e. 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/TCAEB1993690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ba1b6e2fdc8bde812df73299d0530ab56fa5687508047561ae6128df190f58. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAEC1951660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0bde04b5708bc6d9e1a17e592daa0f7607f9b82e47be47ed15781e30a6091f. 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/TCAEI1994455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55abc65fa65b97ee68e53aca7fef69971afe1d8d4452a302e24167c5780d12e0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAEI1994476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5167e3e176b426457192b54d84e62b0edd8203456f24e40e7f557eb4e0a8898. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCADM1883821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b272659bb443e6897692f16142c52d3e3cbb48c1382cb3720ff6588c47d9a9. 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/TCAJA2410648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4f1ffa247261a5d7b2b93bb8bb2f9a401c67dbcafecb07999b3de78406b6aa. 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/TCAJA2466483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2f851d8e09b9b3e83549cbd234dd41ddd17b61d067b0269d47a705802f082b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAJD2463369.