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 0x912875e8256e720bef8f23ed0959069bf887b82ac4fa3097688eeea75bf8d64b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/82e082c1-27e0-43e8-94bb-5e627b8ac8dc.json and https://artists.proofprofile.net/proofs/artist/82e082c1-27e0-43e8-94bb-5e627b8ac8dc.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 0x5f988bfac629389da1fac175db6f0495413190ae4aab670236142736f0dc2194. 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/QM6N22466797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6baef6f637b0f01129c1741f5bdfb0bc4d13d29b9ed51f23dcb4b6dec7889b1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TW2441431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d7dd44a8d67ef5ee746f458a55c6fcc784fc3f40013022226743404df68090. 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/GBLV62321422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34cb5bd0d44a22951548ec741e5161c90a2265f07425c0c5aae886acda87f32. 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/GBKQU2368413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb868fcf3a59f6c86ec7176d23aff6d670d176584066333d08e14ef40e75a46b2. 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/QMDA62225767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143a352b5c6650a7459b7607d658b409d67160b1b2060f3fc36cfd40168547c8. 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/QMFME2218640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa052440f9a032c7e139249ba39fbbc3b9ea2f844f87f0e11d6826a49b53a2499. 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/QMDA62244476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634f28b2c57bd18db2fb67cf525351c7ad0bedd517ffbab6b1f5a088bba5787e. 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/QMDA62236383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841985839cd13970bc812d958d80227047552ce474fbfc9ccd7a17ef14cea57e. 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/QM6N22283472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2209d51163604cbcaa8ef30425a0114a019f6d51439800663282a105a585905d. 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/QM6MZ2224958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb92aeeb21decaefba0b7240bd90e8b2b46f45773fb08f5a2fa99cab625badc. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QM4TX2260365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffff71f4e6fb27993b703b13d3d48ad9b2f2784fc31d53bd93e7c87eb2e52919. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM4TW2200445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7840bf9c01bbc13e6a86914ef3566aac1b7ed9f9be7a6c63fd07c9984667649. 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/QMDA62135556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d81c44b4781722cfce8778922aca84fc458af73bafc5b36e5b7c022902b0e7. 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/QMFME2103448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015732cfb1fbf2851f71929821328c4f251330acee899a2554e9f644ba8d5ed9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMBZ92101148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae08d978742fa045a3184290b6b35034bcfe8a8b882635f69a6b4af9cae61dc9. 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/GBLV61813899.