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 0x1471d53ab2199019e5bb999612026e3c4315dce399caf731e4f7704f1fbea2da. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e58f19d3-6f5a-424e-aa06-119d19fe1799.json and https://artists.proofprofile.net/proofs/artist/e58f19d3-6f5a-424e-aa06-119d19fe1799.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 0xd028007e85c9379bae46bb21735142361a48e5c668d856b2ef394e7ad2a07bb6. 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/TWU712202519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6afeb09ab5399bedf885a330d77da62cb6e6de555a605494659912cd3dfa60. 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/TWU712202513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b862e2642fcdf38f1ab8a0b9592212708450ca243807b0920c41572a2940853. 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/TWU712202506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cfc5a3749af92693321febe608514614101bc0b1ef7cac862e85aaebdcc420. 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/TWU712202508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cd38f11ced4bf4c18e245bd176067b0bedefccea10b14e03a118085bf08b19. 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/TWU712202517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5150d708a1c8ec644c34fec0c6d98c34ce2736101601d3e3601e677dcc09c1. 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/TWU712202510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ab2c51d112de6a80bb86866ada5ffa2ce7c38107b6335e2ca2b3c1ea42e032. 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/TWU712202509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12a1c095c793c7c96fac1f6a3373bec4c8ec0a4cc285dd57cb2c009d2db4c47. 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/TWU712202520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc063cfcb85ae967403133122a45ef28476be09ecac16c24b653018c9a11dbd. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TWU712202507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed377e7409742c0508d2b5323adbe273664e5de644f4ac1666266e0356f4afa. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWU712202512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8846e5398402f5f54ab377d710de667ed1ee8cf03cbadc6eef45145f64885779. 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/TWU712202514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf68fd9eb941c9733748bd38ffee395326bbb8001712129546fa183d6f634ce2. 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/TWU712202518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34966e246d5f73d90c0c4943704ff15f9a6cf1d0ceab065a2329fdcb7b0a9fd. 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/TWU712202521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa956e38ba63dd59c3c1c7b2c28eafea8a6d814d65a645d6de2da27717da8ee79. 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/TWU712202522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1991a50044a99a5c2ed5696e72c175c2e70ae6e4bae0a60a08909fc6deb84f9. 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/TWU712202516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32f15042ae9cad4451dcd4e30eb1f25a6714875391c7b0455ab939f85060d76. 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/TWU712202511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d406d4ea42a3d96f2b3d330d6a531eab18bb631a67a8a0bb54202f5fa84016. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:53:56Z), 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/TWU712202515.
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 0x2569f6929fef7a604e5c82335a2e0eee269c7526d38716d517330e899e9dd7a7. 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/TWU712404431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3de97d2d050381fe96f7e0aac73051f6dfa65e59dbae3caf906e9d468f18007. 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/TWU712404429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fb89887be22d0c13179fcdd64a15caa55aca7f1e7d5103e4701eb2bba01c3b. 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/TWU712301077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b584d7f85b7c0f8580a7a393122e6ee662b192d053030fc6456a25a3515738. 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/TWU712301074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858bfe36fce6fb12c676745bfe11b8729a9a83767211fe0389a395b4be1381e3. 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/TWU712301064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d0859b2d090620849f0db8a527f074e1bade966540b54efd32aabbadac77ea. 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/TWU712301072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219b6ffe5cba4a3210ae2619d5b8eab3a61e29390a9ed850d4e70d59d16988db. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TWU712301070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08167a1621f94123fa106fd8acafbd5acda3f630967f5d9f143527b398283afd. 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/TWU712301071.