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 0xc30edce179afb434471f9e4a14a1f32b85f3c3028cebdccda7ec5c6172ec2b6f. 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/2347516f-b424-47ef-bb6b-9ff7f763ce35.json and https://artists.proofprofile.net/proofs/artist/2347516f-b424-47ef-bb6b-9ff7f763ce35.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Taps: Remembering Our Fallen Heroes on Memorial Day
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 0xff4ab6f2ad607e13cf756ecd83a645e4e7ab689224b0671160a5bffb08a7eb37. 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/USA5R0822301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42825ccac15472f37bccc93ee302317585d69459d76f2c7cf7105fecc30912a1. 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/USA5R0822302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29227d3d77dbca105bb49be3af8f1945d6d08bcf662800fb1dd0c28c87ce270. 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/USA5R0822303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710c81e630faf41bdd57c583f7dd854ddbb39f1640c3781105d925d6e1ab044c. 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/USA5R0822304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc997e968e8eb5f782aa0c236988ee335897c02666d6fcc7301db6cd63500800. 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/USA5R0822305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e8c4cf7355b2f8ea55bff5d7160997ed987c640dc1fb6f08e059837c74700f. 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/USA5R0822306.
United States Air Force Heritage of America Band
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd2e4a838eb5962a8b1dc0b25d846fa1b5676400468c37b7cdd4c2ceeb2c408. 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/USA5R0822307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0450afe5537cc6471bbefbe881ae64f4e157fc9a3e2b3741754ee06e4e1a0f3c. 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/USA5R0822309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2111d21ef560bbbd9e23447dc52c7b4e1d8c01defe37e563952cf21c536f252f. 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/USA5R0822310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5682f1752dfc6e4ad61a77f5a64f1360e973b9d13d2fb0c65b39233c7067c3. 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/USA5R0822311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4da27301d54dc1fc63766a844aed98ac99f1810b71c078b39c3dde99d9511aa. 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/USA5R0822312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0f896cf4e84c344608dbfa494c3e04c62016efb55d5f56f38dc571417183e2. 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/USA5R0822313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbded2196b9394d7190999b1bfa9ba9c4c889a7177ab3f692f2e1fe6a65b15d. 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/USA5R0822314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a25b573a487ff95b1552a2793b26ba95b9278ff622d0d1da25950b2dc5bdb8. 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/USA5R0822315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef9cf92cd960c653d9c9820589ea63c688166c0db08d3c8f61fa2218f2be1c2. 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/USA5R0822316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88032823ccaee7bcf56c208b944b7de827c7243983ab9d8c094e515bd8ecee9e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:03:22Z), 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/USA5R0822317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330ed4e5b338b080ea51bc80dffe790bf4dc41417d2162f41150b9d6a13ba56a. 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/USA5R0822318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2748d9294c4bb49d69a8ff2263061ece2e7c6e492b8c4ed5c7a224c9fdb5fdb8. 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/USA5R0822322.