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 0x4eb57db6a4e39de6f765c55ee732a706141a47e85da7957d3b0e04f20c745895. 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/ff77dabe-14b4-4ee5-b4e5-bbbb12e9f282.json and https://artists.proofprofile.net/proofs/artist/ff77dabe-14b4-4ee5-b4e5-bbbb12e9f282.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 0x3e6cf9afe39ba3c72ce11312edc85c0c71ccaf045fbe9bd0919c5388b888a2a7. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/FR2X42044506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3916e3c72df48d3ac6b1e8ed750dba8a4bfa7bd66bcf7bc9e81f1b10868ed571. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FR96X2104298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9064b765ef2342c7c0c394ab4f7698335d6b9a410db4b47ab6d4ae1e5e3c7d6c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QM6P42189832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7311bf88e0518ff4fca3187cb106115f07faab1711ba75083a6b8f67886d7619. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QMFME2195837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f54b757683a940335c29012fedeca6d1c91b8cad77560232749a24114853e18. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:27:39Z), 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/QMFMF2106249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bda81db6e1f6931bf883a0c19fcff90c6d5916eb8bb68cae78d7ef88c1ee18. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:09:25Z), 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/QMFMF2106259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630fe533838e059eeb8c6a1c3405f29eff991d700f614eef37ec7665eabbd853. 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/QMFMF2106027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31027bb703c275f6c7462c0a0608ef32d23a507d9b83b45452ca0dc9ce81e577. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QMFMF2106252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f1274eff5c76fb62b107125c71175552f69c49e6d91b4554343d3ba2e6c438. 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/QMFMF2106253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb943d8ad57b20377c5948d66b67b65c4942af3436baeae5d37f0df0e4683268. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:19:12Z), 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/QMFMF2106070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaab25daf5fac4eb46a31ef735b3e59c18b120d5fd5193d5a934371db371aee1. 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/QMDA62171506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1218c9fcb687e04b949455f0777dc18c3c32d6499a5b37eaae0b1dff56274ee9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FR59R2295909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b16f63d38f842612182cd98563eae6ec0373eeb51edc0edc9a1f6b058fb9d69. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/FR96X2229836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e91f5f004161d0b46441fed5e37959898ff7d77cfeb07a988a617502b0642ba. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T05:31:38Z), 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/FR96X2230348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe550d331b856370709af25440c94a4ba4521668528fbcce8276297ec89250ee3. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/DGA062348234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2cc43da4ba2e7aa64e848e4aa3960a5c89ac13c51b8a48d0094216cf5406c94. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DGA072372609.