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 0x599a3c311ac13f34f7c16ee65d5aa5e85ad36f93060cd49b0580c2b86c1b6222. 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/f8debf41-2d3b-4de0-a3f9-19fb4943bc39.json and https://artists.proofprofile.net/proofs/artist/f8debf41-2d3b-4de0-a3f9-19fb4943bc39.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 0x7a7af1c566c4cbac6866a3e96f0fd96474acacbd4d1c864fa0580efdd834f2df. 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/PLH442000086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64542dd2ee6f1e74373159b8a1379e24e672953457519af88871658070a1c6d. 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/PLH442000081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d377008cbc1d121fdb928cd35097611f1e13fb09ce4ff05a95094ebfde49d2. 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/PLH442000087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc81ae1f779eb355944c863ca97c82f8788f0e0737ad0ab06c6a7efea56d833. 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/PLH442000085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac4e5a1bfed6207ba5043b87a46ec0393827055d933d964b3d35ea63ecbcc33. 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/PLH442000088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ec5c9fc5f4282e0e4bf73398e9b8b931ce00a2ab1b8dc9bb6e79b22345739e. 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/PLH442000082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c268bcd0a33698a32c677bb327095103cd83e44dbb383ab36b4e9c6cf714bd0. 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/PLH442000083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681983ee5f8396fec4839f2d7cc2e0227785763e53f9272bc7f6f05f41e94722. 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/PLH442000080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c03eb8c9872f0caf47f97172031b7f989023214c5f350335243e2da7da51e91. 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/PLH442000089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e24ab1e7caa56871eebc28a471a6f9921a0903e27cfed3ebdccfc1dd4b1539. 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/PLH442000091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4392a59b2e8640dac2af6d25f3a8a0529abc164ba88f2ccf06f966c6bad876dc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLH442000084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae05c37ca24ea3ce3e44b4ab6abee3b8163b652afd8f939e7dfc59e35af4d9c7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLH442000090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc81ae1f779eb355944c863ca97c82f8788f0e0737ad0ab06c6a7efea56d833. 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/PLH442000085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681983ee5f8396fec4839f2d7cc2e0227785763e53f9272bc7f6f05f41e94722. 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/PLH442000080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c03eb8c9872f0caf47f97172031b7f989023214c5f350335243e2da7da51e91. 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/PLH442000089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ec5c9fc5f4282e0e4bf73398e9b8b931ce00a2ab1b8dc9bb6e79b22345739e. 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/PLH442000082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64542dd2ee6f1e74373159b8a1379e24e672953457519af88871658070a1c6d. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:31:06Z), 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/PLH442000081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7af1c566c4cbac6866a3e96f0fd96474acacbd4d1c864fa0580efdd834f2df. 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/PLH442000086.