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 0xbb4670873538cd9c6cbfcf247b2da057c44446ed8406472e367963f6150c4bfd. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc0c26ca-f802-45a3-8ed2-66e8bbc83fbb.json and https://artists.proofprofile.net/proofs/artist/cc0c26ca-f802-45a3-8ed2-66e8bbc83fbb.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 0x321961f75fb4d5b978751fecea70856e3e952a3fd2e847cd3f5389a0120b129a. 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/FRX762318648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1b4b870285e38d8b037d931d850fcfa3db790a4100fb7459c08b489420c3ec. 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/FRX762318645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9678407d0fc20a8185e996ffbce066deba515246472c4558d004d69d5c79c92. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX762318642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d42a1096f6eb5735fdc107e3046521f02f5f90ef5fa488d4148fdbc60bd4efc. 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/FRX762318643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa2b2b26061ed1a5e0113220d0ed1901daff5326eee8fcff2c39a4a48d2ce29. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX762318644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d5d89c696aa7cf0623f69f75ffb7c64965b8b41c0dc7ea18511d8331f9a6d5. 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/FRX762318646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa814814d1831f4b83cd7f64b5382695878e561825f175b696d6d2177ccadf038. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX762318647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967364e1a91938037a9f12e55386c288eed77c9d4ec8d87d160a7a1cb5704439. 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/FRX762318649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a61eb464508ea686f7823edd740365039fae7cd75488e67a08fc2cdcbe449e1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX762318650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fe08eb60befa1fca8b8bec544419e1c37c3621fd8950e092061d6b27435ff4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX762318651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67082ea9e0fa239da4c2dec58df7886a33e8857551cfd1346640e3bea5b92d0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX762318652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c076c38f8499abcae5478e1b594c047da3d6530d4f6898797e196e0e246fd40. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX762318653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4f617231bc3da3f57d543bfdad660ee63209408614961bd99d32efd5984278. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX762318654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e8fdde5177e3de7c77d6eec9a5931ccd36d3484cf88929b60eeacf1bb43dc2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX762318655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e3e1f959ffe36f590346ca6c8fe239903766571c8195604d294e19d7148ddd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX762318656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae1ea8b3e4dc31350dbd0f8997f532074a09710731f274690282fd63435c173. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX762318657.