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 0x0a935fccbdceaa4573a0822b668de62e773413efee7c36a1fb48fd68e1039170. 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/aaa2410e-c0de-4eca-8d83-044f9e0ca4e1.json and https://artists.proofprofile.net/proofs/artist/aaa2410e-c0de-4eca-8d83-044f9e0ca4e1.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 0x957b60d1126ead1c155e6cce8781d1df7257972f51bbadaef94695e5dea6aed5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QMGR32029789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26914b70107343d3d615a0eda73279dc15d57fcc9bfa58f1f133948f2ea97d19. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:17:04Z), 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/USLD91728472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f360e3f208d213a1b8426d6cb50235d65455894a5077b45ae459d5612de161. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:30:36Z), 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/USLD91733330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f48ae744a96c334d1290f92ef06cfd7c50954f3bf07cd24a01c2d9f567cd497. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USLD91733331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8387fe2059b9ff647d0fa8e8b2211ce2e96fa6edd7dd3339101f3bec3c8572b. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:44:36Z), 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/USLD91733333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aeef2901bf1ba9e6c8f8ec4b423519c65f6ecf9a22fd2088987a0ce85dd3601. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USLD91737556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5822bee7d62264ea5620dbb396ed89ad544b41b21877455d243e16b6db37ce. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USLD91741075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b6fa32a0ae0267034b147fc5a03c1fe76a52ad5ce742e2b05fe2723eed4415. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USLD91741495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32c531960fbe9b2347c5e462d7637badfaa7d15cc84c33b8313a81bd7f8ca33. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM24S2303549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196ab257e1b671083c8d69f271ccbb2386e321e0cbc07dcfafb2a6fb8606368e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFZ42421510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c98e94708e4840024ffe2dff0605bc295e04cf203d95a76c93fdaa149ccb754. 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/QZFYX2471979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c0668abd09c14f2deaeaf6e2fe4ee4164fbd8840ac954fb7691639b75cb037. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZMER2405020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e99ff6d553cfc2834f21c1b9b6d479b5e9e0cd84c9c5246fe20bd001569ef0. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:35:36Z), 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/QZMER2405021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026be15a20994b318b6aa1089a76ad5583b9b4c3bc1821a3d56d8290ca88a88a. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZTAT2431564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026be15a20994b318b6aa1089a76ad5583b9b4c3bc1821a3d56d8290ca88a88a. Chain 2 (Bitcoin): anchored in block 958124 (2026-07-15T11:01:44Z), 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/QZTAT2431564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4df133f6003c24ac93fd9df580c797b2a225257413d890936ca0284089e4b8. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMDA62402073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199f8c3f75107f8740885590981eb669841df3748a15522809e4008cdadeb7ba. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNMW2492171.