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 0xb8feee952ebeb88dc8e14be14cab44935ae33a93fe0df86d5ea7f6a85645da49. 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/00c64f7c-3b24-4dee-9f4d-be6de512620b.json and https://artists.proofprofile.net/proofs/artist/00c64f7c-3b24-4dee-9f4d-be6de512620b.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 0x0fdb3c8a74aba8efb9ebadbd38e8583899af3e004f80c76d97956098f54fdf28. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWQ2498719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074a61252e8dede473e7262a3822f203994a3aedae18ae975d08dcc24100fb1b. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZNJX2383272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587c6ae60453affeb1ce00c0aa8a9acefc23c69d636d081f3f7303a3f73e97c4. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZ5FN2438861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fcee37ddd09e5cc198295307f4368f11fe925d7da98a74c479360cfdba307d. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZWDD2420231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3b210fa1c727bf8bf4643da2d5d1c25a0f02eefb9b8c753577db44a1cc512a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZW9K2484421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f8eab227182fafd9bcf103a8487ff5b190b547b30a36873261503bfcacf9fa. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/BRDIV2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7efc2b38a3af8c1b70a4ae2b9b1cde133b31d2ecd2b29f18ebab61ea2f781e. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QM4TX2595317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf063676ed8728702cade7000e2b1f95278469436fe8e6e31fb2f598b628b240e. 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/QZ5FN2564443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8639c9a4a9af7331dfcb22df1a7b403d3067f886eec47c66d5b7cfe15808d07f. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZ5FN2564444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b72dc251de03c367441c0bebba76fbe5db1f52661c1fe0445eaff5d900a457. 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/QZ5FN2564356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c1060ccdb9607505065ccfe8b63ffd2acd5ee9f47646274f2caedec5755c90. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZ5FN2564359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0a50b4d222e6ca9949b72cb6b70797788027732e02fbcb1c5b842e3431dd38. 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/QZZEB2468823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfefd28aa55ace9c5808da3593a7306af1b17d7d14ba461d9bf4eb27bfc498a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FIFJM2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe853a336297b57f4ae56fe0b79ff025b48a687c818b5e088de9edd0355cbfe84. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBRKQ2446066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6651f8e624bae21acc880ae9afd4cc80ccf3cee10f9cac10b524278a35d934a5. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QM6MZ2433773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120fe5e3fe60b6d97ff4f73cf6aa9bd68a424a0d62fde5b6e28777a583cba2e3. 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/QZ5FN2413484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc06daa63610efc02ed438d5ad77818794b56e9455672e7a519dc01b5289407. 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/QZPYN2377851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62c02e7ea74b00b0e2964318cf411c9d2eb9a00a9f4faa1f5790f5d1525e408. 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/TCAGF2261906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc74b471c1272246731136f2877047536afe30dd2eba685fb86f43bc69e8405. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHZ32242409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ee42092b5d2972bbfeecdf260acbb89bec14e8e627ccf7636ff439f7fc9388. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USA2P2331254.