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 0xeef429f06e364cc2b8f7518b30f2c740b07898c3f7e08e0f2e58b377e49c5e95. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/624ab0f8-0c2c-4c3b-8cb8-2ea2e5922752.json and https://artists.proofprofile.net/proofs/artist/624ab0f8-0c2c-4c3b-8cb8-2ea2e5922752.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 0x00d856d8971f7e574cd49b79e4784e9880d8777cb6f9a443d7e91a3c2b1f8eb7. 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/GBLLT1605436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe037549cf53b50a6d8e40178db60259655c6e5f73bf9621392099d96a0b92efe. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBLLT1605439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e62e0639313e47cb70565341db29db8b706d23c02e45fd5a72ec2c945c8096d. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBLLT1605441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05899ad5c863ee903658a25eefd2134fd2b1d326563160e1b63a78ab9bc1723. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBLLT1605263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde809e505e3512f467a8a486423074753c35fe55c6fd888eb61c863dbff0cb1f. 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/GBLLT1605265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83eb52e61c957e77ebf44066da94ff99ccf3690492547d3d17399a9d9125c837. 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/GBLLT1605267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2dfe2296a5f57c8643c978ada0208f2f911b85e6189acbe60b1bd955f59595c. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/GBLLT1605271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cd101a89ffe90c0935324a658c5e3e37e4daad0ad325db4222083fabd820a2. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBLLT1605272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941e1f30b5ec170f04e4b918e9d41e920a8ec63bc8560287a4570e72ef10db99. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBLLT1605276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b6fd0a599c60dd0b3535f62a03aa175e3c357a5bc8d62ec83b9f1343c34895. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBLLT1605288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc938e6b82da62f367fb62163ad15fff68130fdbb87aa48932019528a6f995113. 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/GBLLT1605178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847fc60c7560a20f85d923dc56d24993400b856742d6f1595418daa8532d27a0. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/GBLLT1605184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7246e35e4dc6f7402623481e8d70a777bc7dd5e614bb7631e7187375daefeadb. 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/GBLLT1605202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea79c975edabc00a047756d27339227957a99c36f3b733df9343c02ee29226dd. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBLLT1605485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a259833a1389b7a8d72fe9eb24fedc3882b462ab92269d2d97704a278290691. 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/GBLLT1605496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae49477069a70ead8137a99d098f94301cefba6a8df1dda6daac264f689722ff. 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/GBLLT1605490.