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 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 0x7894fbc7a672bf0eaee5537ca217d675c83c3bb34bde10dee379413d2bbdd8b1. 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/bb9d9b6a-303f-4728-8c80-db32bcf1bd6a.json and https://artists.proofprofile.net/proofs/artist/bb9d9b6a-303f-4728-8c80-db32bcf1bd6a.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 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 0xd7be1836bfdcbf32813b24b66accdec65914237a0d45208ffe22bfbeaf7e8984. 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/USCGJ1507689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5554eb60ae2c4c9e1a9a2c1e25a67425921eb0db6d378d5341c5ca0743c29054. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/USCGJ1507694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5053b94a3780e6a2b1139f9f84f80c48a1ab62d04d3db168c902d8b28ee9969. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USHQ41100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9962b9c960596f1dd95f3a904f68586cde93f5a3f91426650058d1be9bdd2a31. 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/USHQ41100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314f313eda9aa7e37a0924f85a07b47acfd7402bcc0244bf159584ca0952becf. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/USHQ41100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e83bd15658c61ee8c8c4b94c9c49a97fd109588ca904cca620d3b0158549d8. 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/USHM22342483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f40ac72d78359086e250edcedbad5d93fa9b70613250e8f0cab278f336de6e. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USHM22342485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2275828a01b08d9484cdfb5f8b7a1191e93e85fa1f976ab06c6fe736d2c4d15f. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USMH92360293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7564250cddd7841317e14d56f46d3f0ab8bf437be6ec77820ee425e593a1e04. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/USMH92360294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329c8eceb41b6e674e25f0ee585bde2c4079ec8bb1975a08dc788b718e0f0ea7. 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/USMH92360299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1d4355cc39beb2a18bb2bef10980813b45a476862c5bcc3304c51deeaba37b. 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/USMH92360301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332c0263d8d92da626970b5556e90d9f64bedc90ccab417f3be58114aac8816f. 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/USMH92360302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df62bb1bcbeb534b0b4e3e70cfa8147bd94f867a3aecf3a4447afe140b36e99. 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/QZMZ92126623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bee8509c528460ca2cd53fc4e38ec35eab0d66e6b9f31aafff6cd1c7f44537a. 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/COGM11614002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df62bb1bcbeb534b0b4e3e70cfa8147bd94f867a3aecf3a4447afe140b36e99. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMZ92126623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a43a64e4dcdfcacb1abcb9e5a7856c6296df46a2fcc51068bdd0e407743f04. 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/MXF602500066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a43a64e4dcdfcacb1abcb9e5a7856c6296df46a2fcc51068bdd0e407743f04. 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/MXF602500066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d24e2b36114152e6f85c1d6c2f27dc1c5996dc909aa5917380f96d1603b2ca. 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/MXF601400771.