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 0x8cc59650be4bf2f55332f63ce82b98d6c394c9ae5ee7d36d2f8fadfb6823dd7e. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5ca6007-c933-4b44-8be9-215533811a51.json and https://artists.proofprofile.net/proofs/artist/a5ca6007-c933-4b44-8be9-215533811a51.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 0xf804fd356976da26caffecaed9cf6ce5d5cb426a526482b815000b29ffad8ef7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZWFL2327435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e10fa985cc0f1f29d975bcb87cbda40f27caa22ed66fc28c821a5cb3409aef. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZWFL2327438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa501ed6adabe3bd6ed8041b7766e015d65ff02d01cbce0a69433ccb908b3fa34. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZWFL2327437.
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 0xca97905a80bd9aa6173440c23e9aec928752560245859cdb487009bd92aa1997. 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/QZWFL2327439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef25bfdf68946efd93570f21acf2ebfd862d05fd132330aa483b5a663c3ce554. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTBE2491640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab80a5d1b084cad6e64a3d001baa89c9559bb106f81b24930b2458f09b05125. 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/QZTBE2491641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf373ff784a2131382f9b75f5489b8c735e5bdf8019d1c2ea7d2157b8bb276384. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTBE2491645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b749f148729a7a93b872e278ac004de80273daabb0cc8c1fafaa2081955b419. 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/QZZ7T2489610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b54fdcee34a7893e9ece6f7e268f4eccc88c9f87a8ee76be14fa8153f16bec0. 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/QZZ7T2489613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5854b1b81bc6c5fa2a10f9c589353285b952d2c42da5b05655d85cdce92ccf2e. 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/QZTBE2491642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275401cb8bb5a1b57d24484fe14dae99d2fba515cf23001dcfcf7c2884293322. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/QZTBE2491643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b7fc153f2db9d1689fd1fa10a866d16f1036010404055db1bf2d5f868c2b38. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZTBE2491644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cb57301c723b2eb201bea73e81b177fb16b14552de22ac63bae7cdbcee54ed. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZZ7T2489611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fcc05889545a7779d479a2b0ea8bb5121c1d7bf6b1db860780e8a89b6286ef6. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZZ7T2489612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5525155d07c972af5bba9747206d26a690e9a6a79ee0956b8509d8771455f7. 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/QZHN52501348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b5fca5a9e2372a146d903a470448e55d112812686a1c12fb1e0e79dd57c08f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZS7J2570045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2bbc3a2710a1500fe4df319743bdfb3f7ed4a4b6a7e68efc6b91752e8bfb0f. 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/QZSYP2266018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27351589c20212ef0048770091c4e5de969db1e3fd9a932fd89d675df33d77b1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM22097039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc888b29e3793b24277327ee7eca9fec38812828b6d2e66822acb3600d0e9105. 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/USL4Q1807743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4d2d7a5ebc0c9a1d7e7721528761e601cd06f477b434d2b0fb80006097c537. 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/QZTB32408145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8365164bc8c078f4061e075861ac8bfc735599966c3edf5bcce3f3b5fc79d48. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/TCAHU2489019.