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 0x8fc906eebf5e5cbee6d9b0ad50a31fad59666a76404aa6f40c63bb2751e6642a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb6ff146-fc47-4083-aaf8-8d2aeebedefe.json and https://artists.proofprofile.net/proofs/artist/fb6ff146-fc47-4083-aaf8-8d2aeebedefe.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 0x3753edc41799888d5022289bb11164b4353a0ae376593ff06602fa40925ca766. 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/CZA231800385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5862552df9e1c6e1e59d8b5e6e431bec5ed9fa8b3a40c87d463ab7158a47b00. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/CZA231900093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e3383dec8e48c1196e5716c4e4f11be502f639e6e4d389f678d86b87e5bc8e. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:37:30Z), 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/CZA231900094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc2c70ea1dd0cb100b4961b090aae2c1bbbc7be764d0232813080b7b890a464. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/CZA231900234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123aaaea85f3ccb2c5a1d8cdb3515539a9e4e436f0a251821dc71904838fa869. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/CZBV70100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77902c794bfdf2c0c4afd88ef949a06927e2ecea6c8fd4012187fb8b6b0a54aa. 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/CZBV70100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432d2c2d4cd6b263d673c2990ac3226de219ca71749f5d0a0a9f9b66058ceb3d. 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/CZBV70100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a81a573dfaff06382835e9ba6d10f852c40abb4c758d18cd3abd5c21b892045. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CZBV70100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be06eed303d017258b88ff4a9c868d9af175ca0a14417489d7ed1994547a2cd. 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/QZFYZ2307008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324584bc0441dae86dd7a0309cf87c3dcc507397cb9c55fd8680d108e4cc08b5. 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/CZK502406002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ad2065fd6bf2a1023f350ad5000a2f5a06f48c66dfb421e7cc7d2a250da557. 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/CZK502406003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c031ad2736ccf845b1bb6ebf0e443016646e2ee2317fb600ab3b9869b2cdff7. 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/CZK502406004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bab51af2a95c7aa0960ce2f68ba52c4dd5d01336570c1a8798db0095ecb537. 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/CZK502406001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f2f11fc23f61874791aca4a307ad09919fe26580080d9fc15063fce7c37729. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CZK502406005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a968333f4259dc7f99ddc085d0a05810328dd8f8e354b5b3874c446bd8fec92. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CZK502406007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23702d6dd4fe2bb709ac670917d11ab9fa6cf9b72ee5ff4304b0d926bb94011. 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/CZK502406008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537290fd7bf7ac4b1198a7366eb66b51687fc796cc6d74817d4561f0bd7cac24. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:46:31Z), 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/QZK6Q2328452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fc7b5da74fe4cba2f9b1878de0fe430a070549d10c2d6aca547ac6740a5833. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-21T18:36:54Z), 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/CZK502406010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757ef1a96b18d069033c29f1d5d6c357efa904bb09418ed799f482e7846538ce. 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/QZES52366992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be06eed303d017258b88ff4a9c868d9af175ca0a14417489d7ed1994547a2cd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFYZ2307008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22750fa82e8707e0942fa2d45316a258e90365a312dc0b2c6836f8494236a2e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:45:44Z), 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/CZK502406013.