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 0x3065dc5e9a9032b8cb844b15c099a0db08885502307dcd889248f7f387d2fa48. 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/2f2e446e-e836-4d08-b827-d2d528f6cc42.json and https://artists.proofprofile.net/proofs/artist/2f2e446e-e836-4d08-b827-d2d528f6cc42.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 0x4ee4e13c8bb466d8328a4a8ce6675e7645ae5e21a848154eeb93569c0ea257a0. 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/AUMEV2475314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b7514a2a05972f9e486decb5b2bef71467615708c773a8b3b0d1274322d1e4. 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/AUMEV2449472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857a880cfa884eb35a716ad9d143d24b6cd07bf2a619ede780a03cdafe4c1a96. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AUMEV2357473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f072258cfead5ca3859561f727de8de8052fc102f71a1ca3a4eb9c46e21f6b3. 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/AUMEV2355242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18133280783bba29b21f2b0b47880134a7fee8e1a100386f6b41d4415cad3ad3. 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/AUMEV2322086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc0eb21acaf66a80fc91f8ee0846840559d9591b04477885ab7620d1f5c05fb. 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/AUMEV2314054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b75f1fd395cc1e813cf4326e2d96392ea7bc8d78f70dc602f3df06f5e13a053. 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/AUMEV2255696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3311c1f2458e45ded888758707980851ecc36f9da92d481362bd6a637f5013e3. 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/AUMEV2357478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f072258cfead5ca3859561f727de8de8052fc102f71a1ca3a4eb9c46e21f6b3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AUMEV2355242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18133280783bba29b21f2b0b47880134a7fee8e1a100386f6b41d4415cad3ad3. 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/AUMEV2322086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc0eb21acaf66a80fc91f8ee0846840559d9591b04477885ab7620d1f5c05fb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/AUMEV2314054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b75f1fd395cc1e813cf4326e2d96392ea7bc8d78f70dc602f3df06f5e13a053. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/AUMEV2255696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3028d81deb4ffbcd3d271cb2540777e515f2f154c897810f54712032c88b960d. 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/AUMEV2292832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc61d2b026e32f8140e2b667b8f7a7718ea4fb782d1db105bf9e3f894321ed01. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/AUMEV2170123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301ebe75c810a5dce25b2ee360c55a0194480ef8ef7311172b3f7a90f864be7f. 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/QZHN82191403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46130bd86a6c6899b7674daeddd0ada3955ebb3d3d2cd0ee157232fe3b995027. 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/QZHN82191404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954c3378a878393003266745ad81f6ada5bcdad26f3a7613886ff428972a92c2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAFF2098945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1736c9f4d8fe517301b94726eb44be77baed9e6f77952e298bfc11f034e11020. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAFB2018126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25bb6a7ea4b60687cd6e5b35a793f27aa774d75811dbaef3d2160bee3db032fe. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAEU2050684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5adb090428d08f0a7312d1febe79eea2d2958ab02466049baeb104c8aaaba376. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAED1974494.