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 0xec0d1e290b022ac6a0cbd3f5fc8c1e14893bd58f010c2908f43f16bd236a2323. 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/95d5c3c0-e4fc-4c95-b45c-984d65448a8b.json and https://artists.proofprofile.net/proofs/artist/95d5c3c0-e4fc-4c95-b45c-984d65448a8b.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 0x0f4347dde5aa00a18625f9052a96304089e8352644a7b8972300df7413722868. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZFYY2582632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbf2cfa7a5a9351503612a772042842bd4e4b0f16308ef42ffde546a27ef579. 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/QZFYY2582623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5f8b619e0879b78b9fcfbcd5ea57139e9400d90a0f63323cb5edcc2a17c289. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:29:28Z), 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/QZFYY2582620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13afa6926ac559f39fed51c13ab329963ec8e29219b7e69bd2f1b999e6f5f98. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZFYZ2517138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5080c223a43369dbfa51175c2a6bf561faff7739870813f769c01758e09097f8. 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/QZFYY2560104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0864317f2b32cf087bb27706915c35c50dcfe69d7aba74740c43a71ac92b4881. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFYY2560105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fd2240348ce217dba9ac70de21f2111416d52b66cf601ccdbf6db84927913f. 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/QZFZ22575345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f75e73c78298bca7ec072a4fde30020340ad27de7132b03015ac0d3e8f1b45f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZFYZ2508638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413f035b46b4ea6fa2153015dc4af8aa805cea2502f0f5c927d13beb468a6d2e. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZFZ42530950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215bc9c393fc022359ff642872e9b721280961f68b9459e4de41755697dcf25a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZFZ42529310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36c6deb687a1ef0a97429cae75f79150b32d413b80e110ac2e6445ec09461c8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QT3F42427608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77df52a0d12bc7f44c3459286dc031e05c3c0056a368ce70cc60cdf0a1fca473. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:45:09Z), 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/QZFZ32545661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213f21e2dbf12214c48ec3b18e6984355fa153ba83bce10936ff1692bc226dfe. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFZ32546495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9945a1582f9722e13e562fc11a68617bd98a97cec3548249dcb064ab1352539c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFZ32546496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f81ea8cf256f6fc5f8668e5f460567ae7d42f9f59a638ac34b49b6616126f9b. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZFYY2572224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4a64770b7ba093538b48bd8e3acf4a774d491c5426aeea26d8c70578df160f. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZFZ42524716.