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 0x4a99b6ca26d0467e59f2c5f63a13622893222bbbf96e6228bf8768e6f20e0b15. 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/f2232cbb-b3c8-4a52-a0d9-a482f996ffb8.json and https://artists.proofprofile.net/proofs/artist/f2232cbb-b3c8-4a52-a0d9-a482f996ffb8.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 0xcffdd5fd3aea2b7de7c4829f2f162a9db93e451f295f7d4c7e530e3b7be65f8e. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/PLE951500286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70eb7c73ded0e64e6b0d885e8637c153ea4dc72167669ceba78d917ac8af2a4e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/PLZ551800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf522a2fff5f05d697bc569a25dd38ebd5b6a66931ddd83dbb72a930546071720. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/PLG251701017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37ad1aca6fd17878a39680712b5c961baf21dfb4be1101507d60c918c885d52. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:10:54Z), 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/PLG251701019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055864708e76bc489c0fd493ca1c2897f4a9ad617adeb25f3454778f7001f582. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/PLG251701020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b2a9af9f372f2fbab57b4a8a7e3c40711e844c691e38ef8b6e470aba9072cc. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/PLG251701023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d6e7c3ca3e2ce9eba28e9179eec42c4c24434cd7b31b9bce7434162ce8d8e9. 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/PLG251701024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98c5b1d5989965803d1101a1b6a582433ec7ffafe172a286f51d37aede51468. 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/PLG251701025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b8e92a88950b88a95a3cf756a4afa3b944ce8e91b94142f7c1faa76707d4c0. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/PLG251701026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd52b39bb6de53dd36633be7c689fd23e414945388480de31fcc2ed077f64973. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:38:37Z), 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/PLG251701027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d7aace4cfb163d87027b23c1d0366ffc3e6191f0e40f329b58fb6f6ac40ec0. 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/PLG251701029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8e73b577e4b6d99e66c90bf6501c37ead03023a5b978ccdac3bc0c84e218cb. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:25:32Z), 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/PLI364142850.