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 0x4aa921b145bf819b4cfa92ad596e874987bbb6f93165f9cb21db2b622daffcfe. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6161bc3a-f5d1-498e-9568-c7d8d30909c5.json and https://artists.proofprofile.net/proofs/artist/6161bc3a-f5d1-498e-9568-c7d8d30909c5.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 0xac010ce0aca85fa709c497aac8d240175273cbe6d14b437f2a3adf47ef872503. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/US7VG1659019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1273dda11b5c8e706b5c979ff8b6d8b131766811f88d48ac0a461de54bc76214. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/US7VG1659022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc11aad780b7e05eaf8731dc1fa9723573dfc4be7ce363834e663acab45ff573. 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/US7VG1659024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc38d62560025ab712b29663f9bed2dbec2c80473a20f83bc81aaa17413562a. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/US7VG1659026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe9dcfecc507c5f09dec1683455230af5d3f5db63f89b44074f3b75d92e60b1. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/US7VG1659027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41479f249d4ee6c4e7b9c4bf49eeb3ec1e2348497454cae70089648468b59993. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US7VG1659028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfc2c085e41daaf3c0f2ebae6205a240c3c351f4a40f7d075d6008eead4bd01. 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/US7VG1659029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a2014e8a5bf3aa56ec9fe6fedffd681dd225cd59d60b7632ea241d108994d1. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/US7VG1646470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d08a5c96f9b9efc4f72bc838eb288bcde48cc1523833d5eed184f4b2e54f95. 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/US7VG1646471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b5eaf6e1304ab03f399b3e2672b400ff82a604cf57340551fe522eb9f2e04c. 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/US7VG1646472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc8a5b18c88cc1ff572695142ed8ab22ca4a25ca3831a930621b665e1505c60. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US7VG1646473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea6e35a68b1000e788e8b5193a0ab097fc611bf1da7d4cf2f2adee9a352cc5a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US7VG1646474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4f3e3ad3cc3f267aba58522fa1225268be52a909b35a96a7e092bbc8f3af6a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US7VG1646476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18458de40af1691288720ee87ac9998c90b920feb8bc3f08fc5422d97f683fc6. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/US7VG1646477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6cb4ea2f7dc7cfdafa196e3b2b5ac900797a8792a279d11570b6d7154e57f9c. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:46:32Z), 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/US7VG1646479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27ec3a51eecc1659ad7e92fad79ccf4538ee0505f91baeef6cb7c3bfdf7fb61. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/US7VG1644453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13cd3aa53187028129ae559e3fad4705a54f0d3e41a4a6dc6df2f4550e86bb7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZ5AB1956082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23c268679859a8ac22cf2dbf8515db38bf3c1da543ae59b90379e54cd8df1a0. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/US7VG1988613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6644b0a538221ce1033b3a0a55fc58363d67165b14e5606c952f8a5b6a023e. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZNJY2430958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fabcf02b45e6491247b5077fb62578deb74ebe32a0774365f60966542547309. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMZ92115901.